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Document And Entity Information - USD ($)	12 Months Ended
Document And Entity Information - USD ($)	Dec. 31, 2014	Feb. 19, 2015	Jun. 30, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	NEWPARK RESOURCES INC
Document Type	10-K
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		84,069,387
Entity Public Float			$ 1,019,100,000
Amendment Flag	false
Entity Central Index Key	0000071829
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Period End Date	Dec. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2014	Dec. 31, 2013
ASSETS
Cash and cash equivalents	$ 85,052	$ 65,840
Receivables, net	318,600	268,529
Inventories	196,556	189,680
Deferred tax assets	11,013	11,272
Prepaid expenses and other current assets	12,615	11,016
Assets of discontinued operations		13,103
Total current assets	623,836	559,440
Property, plant and equipment, net	283,361	217,010
Goodwill	91,893	94,064
Other intangible assets, net	15,666	25,900
Other assets	5,366	6,086
Assets of discontinued operations		65,917
Total assets	1,020,122	968,417
LIABILITIES AND STOCKHOLDERS’ EQUITY
Short-term debt	11,648	12,867
Accounts payable	108,242	88,586
Accrued liabilities	53,342	46,341
Liabilities of discontinued operations		5,957
Total current liabilities	173,232	153,751
Long-term debt, less current portion	172,498	172,786
Deferred tax liabilities	37,694	27,060
Other noncurrent liabilities	11,240	11,026
Liabilities of discontinued operations		22,740
Total liabilities	394,664	387,363
Commitments and contingencies (Note 15)
Common stock, $0.01 par value, 200,000,000 shares authorized and 99,204,318 and 98,030,839 shares issued, respectively	992	980
Paid-in capital	521,228	504,675
Accumulated other comprehensive loss	(31,992)	(9,484)
Retained earnings	262,616	160,338
Treasury stock, at cost; 15,210,233 and 10,832,845 shares, respectively	(127,386)	(75,455)
Total stockholders’ equity	625,458	581,054
Total liabilities and stockholders' equity	$ 1,020,122	$ 968,417

Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2014	Dec. 31, 2013
Common stock par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	99,204,318	98,030,839
Treasury stock, shares	15,210,233	10,832,845

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues	$ 1,118,416	$ 1,042,356	$ 983,953
Cost of revenues	876,999	858,467	811,048
Selling, general and administrative expenses	112,648	93,657	81,500
Other operating income, net	(1,827)	(4,213)	(870)
Operating income	130,596	94,445	92,275
Foreign currency exchange loss	108	1,819	749
Interest expense, net	10,431	11,279	9,727
Income from continuing operations before income taxes	120,057	81,347	81,799
Provision for income taxes	41,048	28,725	31,346
Income from continuing operations	79,009	52,622	50,453
Income from discontinued operations, net of tax	1,152	12,701	9,579
Gain from disposal of discontinued operations, net of tax	22,117
Net income	$ 102,278	$ 65,323	$ 60,032
Income per common share -basic:
Income from continuing operations (in Dollars per share)	$ 0.95	$ 0.62	$ 0.58
Income from discontinued operations (in Dollars per share)	0.28	0.15	0.11
Net income (in Dollars per share)	1.23	0.77	0.69
Income per common share -diluted:
Income from continuing operations (in Dollars per share)	0.84	0.56	0.53
Income from discontinued operations (in Dollars per share)	0.23	0.13	0.09
Net income (in Dollars per share)	$ 1.07	$ 0.69	$ 0.62

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net income	$ 102,278	$ 65,323	$ 60,032
Foreign currency translation adjustments	(22,508)	(8,750)	(1,523)
Comprehensive income	$ 79,770	$ 56,573	$ 58,509

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balance at January 1, 2012 at Dec. 31, 2011	$ 945	$ 477,204	$ 789	$ 34,983	$ (16,075)	$ 497,846
Balance at December 31 at Dec. 31, 2012	957	484,962	(734)	95,015	(66,622)	513,578
Net income				60,032		60,032
Employee stock options, restricted stock and employee stock purchase plan	12	1,088			(402)	698
Stock-based compensation expense		7,103				7,103
Income tax effect, net, of employee stock related activity		(433)				(433)
Treasury shares purchased at cost					(50,145)	(50,145)
Foreign currency translation			(1,523)			(1,523)
Balance at December 31 at Dec. 31, 2013	980	504,675	(9,484)	160,338	(75,455)	581,054
Net income				65,323		65,323
Employee stock options, restricted stock and employee stock purchase plan	23	8,284			(2,120)	6,187
Stock-based compensation expense		9,699				9,699
Income tax effect, net, of employee stock related activity		1,730				1,730
Treasury shares purchased at cost					(6,713)	(6,713)
Foreign currency translation			(8,750)			(8,750)
Balance at December 31 at Dec. 31, 2014	992	521,228	(31,992)	262,616	(127,386)	625,458
Net income				$ 102,278		102,278
Employee stock options, restricted stock and employee stock purchase plan	$ 12	2,970			(1,335)	1,647
Stock-based compensation expense		12,411				12,411
Income tax effect, net, of employee stock related activity		$ 1,172				1,172
Treasury shares purchased at cost					$ (50,596)	(50,596)
Foreign currency translation			$ (22,508)			$ (22,508)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$ 102,278	$ 65,323	$ 60,032
Adjustments to reconcile net income to net cash provided by operations:
Impairment charges		176	443
Depreciation and amortization	42,030	44,198	32,821
Stock-based compensation expense	12,304	9,699	7,103
Provision for deferred income taxes	(2,328)	(7,832)	1,358
Net provision for doubtful accounts	1,252	416	1,709
Gain on sale of a business	(33,974)
(Gain) loss on sale of assets	(1,369)	(3,178)	724
Excess tax benefit from stock-based compensation	(1,278)	(2,146)
Change in assets and liabilities:
(Increase) decrease in receivables	(53,494)	32,172	23,565
(Increase) decrease in inventories	(14,136)	16,431	(28,758)
(Increase) decrease in other assets	(546)	4,574	(641)
Increase (decrease) in accounts payable	23,606	(17,733)	13,702
Increase (decrease) in accrued liabilities and other	14,828	9,803	(1,813)
Net cash provided by operating activities	89,173	151,903	110,245
Cash flows from investing activities:
Capital expenditures	(106,973)	(67,929)	(43,955)
Proceeds from sale of property, plant and equipment	3,205	1,313	863
Proceeds from sale of a business	89,766	13,329
Business acquisitions, net of cash acquired		(6,776)	(53,075)
Net cash used in investing activities	(14,002)	(60,063)	(96,167)
Cash flows from financing activities:
Borrowings on lines of credit	62,164	254,390	364,426
Payments on lines of credit	(62,445)	(328,086)	(296,944)
Principal payments on notes payable and long-term debt	(55)	(25)	(40)
Proceeds from employee stock plans	3,442	8,328	1,059
Post-closing payments for business acquisitions	(412)		(11,892)
Purchases of treasury stock	(53,130)	(9,281)	(50,756)
Excess tax benefit from stock-based compensation	1,278	2,146
Net cash (used in) provided by financing activities	(49,158)	(72,528)	5,853
Effect of exchange rate changes on cash	(6,801)	(318)	1,668
Net increase in cash and cash equivalents	19,212	18,994	21,599
Cash and cash equivalents at beginning of year	65,840	46,846	25,247
Cash and cash equivalents at end of year	85,052	65,840	46,846
Cash paid for:
Income taxes (net of refunds)	56,568	31,101	24,508
Interest	$ 9,865	$ 10,189	$ 8,355

Note 1 - Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2014

Disclosure Text Block [Abstract]

Basis of Presentation and Significant Accounting Policies [Text Block]

Note 1 — Summary of Significant Accounting Policies

Organization and Principles of Consolidation. Newpark Resources, Inc. was organized in 1932 as a Nevada corporation. In 1991, we changed our state of incorporation to Delaware. We are a diversified oil and gas industry supplier providing products and services primarily to the oil and gas exploration and production (“E&P”) industry serving customers in North America, Europe, the Middle East and Africa (“EMEA”), Latin America and Asia Pacific regions. The consolidated financial statements include our company and our wholly-owned subsidiaries (“we”, “our” or “us”). All intercompany transactions are eliminated in consolidation.

Use of Estimates and Market Risks. The preparation of financial statements in conformity with accounting principles generally accepted in the United States (“US GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Estimates used in preparing our consolidated financial statements include, but are not limited to the following: allowances for product returns, allowances for doubtful accounts, reserves for self-insured retentions under insurance programs, estimated performance and values associated with employee incentive programs, fair values used for goodwill impairment testing, undiscounted future cash flows used for impairment testing of long-lived assets, depreciation using the unit-of-production method and valuation allowances for deferred tax assets.

Our operating results depend primarily on oil and gas drilling activity levels in the markets we serve. Drilling activity, in turn, depends on oil and gas commodity pricing, inventory levels, product demand and regulatory restrictions. Oil and gas prices and activity are cyclical and volatile. This market volatility has a significant impact on our operating results.

Cash Equivalents. All highly liquid investments with a remaining maturity of three months or less at the date of acquisition are classified as cash equivalents.

Allowance for Doubtful Accounts. Reserves for uncollectible accounts receivable are determined on a specific identification basis when we believe that the required payment of specific amounts owed to us is not probable.

The majority of our revenues are from mid-sized and international oil companies as well as government-owned or government-controlled oil companies, and we have receivables in several foreign jurisdictions. Changes in the financial condition of our customers or political changes in foreign jurisdictions could cause our customers to be unable to repay these receivables, resulting in additional allowances.

Allowance for Product Returns. We maintain reserves for estimated customer returns of unused products in our Fluids Systems segment. The reserves are established based upon historical customer return levels and estimated gross profit levels attributable to product sales.

Inventories. Inventories are stated at the lower of cost (principally average cost) or market. Certain conversion costs associated with the acquisition, production, blending and storage of inventory in our Fluids Systems segment as well as in the manufacturing operations in the Mats and Integrated Services segment are capitalized as a component of the carrying value of the inventory and expensed as a component of cost of revenues as the products are sold. Reserves for inventory obsolescence are determined based on the fair value of the inventory using factors such as our historical usage of inventory on-hand, future expectations related to our customers’ needs, market conditions and the development of new products.

Property, Plant and Equipment. Property, plant and equipment are recorded at cost. Additions and improvements that extend the useful life of the assets are capitalized. Maintenance and repairs are charged to expense as incurred. The cost of property, plant and equipment sold or otherwise disposed of and the accumulated depreciation thereon are eliminated from the property and related accumulated depreciation accounts, and any gain or loss is credited or charged to income.

For financial reporting purposes, except as described below, depreciation is provided on property, plant and equipment, including assets held under capital leases, by utilizing the straight-line method over the following estimated useful service lives or lease term:

Years
Computer hardware and office equipment				3-5
Computer software				3-10
Autos & light trucks				5-7
Furniture, fixtures & trailers				7-10
Composite mats (rental fleet)				7-12
Machinery and heavy equipment				5-15
Owned buildings				20-39
Leasehold improvements				Lease term, including reasonably assured renewal periods

We compute the provision for depreciation on our barite grinding mills using the unit-of-production method. In applying this method, we have considered certain factors which affect the expected production units (lives) of these assets. These factors include periods of non-use for normal maintenance and economic slowdowns.

Goodwill and Other Intangible Assets. Goodwill represents the excess of the purchase price of acquisitions over the fair value of the net identifiable assets acquired. Goodwill and other intangible assets with indefinite lives are not amortized. Intangible assets with finite useful lives are amortized either on a straight-line basis over the asset’s estimated useful life or on a basis that reflects the pattern in which the economic benefits of the asset are realized. Any period costs of maintaining intangible assets are expensed as incurred.

Impairment of Long-Lived Assets. Goodwill and other indefinite-lived intangible assets are tested for impairment annually as of November 1, or more frequently, if an indication of impairment exists. The impairment test includes a comparison of the carrying value of net assets of our reporting units, including goodwill, with their estimated fair values, which we determine using a combination of a market multiple and discounted cash flow approach. If the carrying value exceeds the estimated fair value, an impairment charge is recorded in the period in which such review is performed. We identify our reporting units based on our analysis of several factors, including our operating segment structure, evaluation of the economic characteristics of our geographic regions within each of our operating segments, and the extent to which our business units share assets and other resources.

We review property, plant and equipment, finite-lived intangible assets and certain other assets for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. We assess recoverability based on expected undiscounted future net cash flows. In estimating expected cash flows, we use a probability-weighted approach. Should the review indicate that the carrying value is not fully recoverable, the amount of impairment loss is determined by comparing the carrying value to the estimated fair value.

Insurance. We maintain reserves for estimated future payments associated with our self-insured employee healthcare programs, as well as the self-insured retention exposures under our general liability, auto liability and workers compensation insurance policies. Our reserves are determined based on historical experience under these programs, including estimated development of known claims and estimated incurred-but-not-reported claims.

Treasury Stock. Treasury stock is carried at cost, which includes the entire cost of the acquired stock.

Revenue Recognition. The Fluids Systems segment recognizes sack and bulk material additive revenues upon shipment of materials and passage of title. Formulated liquid systems revenues are recognized when utilized or lost downhole while drilling. An allowance for product returns is maintained, reflecting estimated future customer product returns. Engineering and related services are provided to customers as an integral component of the fluid system delivery, at agreed upon hourly or daily rates, and revenues are recognized when the services are performed.

For the Mats and Integrated Services segment, revenues from the sale of mats are recognized when title passes to the customer, which is upon shipment or delivery, depending upon the terms of the underlying sales contract. Revenues for services and rentals provided by this segment are generated from both fixed-price and unit-priced contracts, which are short-term in duration. The activities under these contracts include site preparation, pit design, construction, drilling waste management, and the installation and rental of mat systems for a period of time generally not to exceed 60 days. Revenues from services provided under these contracts are recognized as the specified services are completed. Revenues from any subsequent extensions to the rental agreements are recognized over the extension period.

Shipping and handling costs are reflected in cost of revenues, and all reimbursements by customers of shipping and handling costs are included in revenues.

Income Taxes. We provide for deferred taxes using an asset and liability approach by measuring deferred tax assets and liabilities due to temporary differences existing at year end using currently enacted tax rates and laws that will be in effect when the differences are expected to reverse. We reduce deferred tax assets by a valuation allowance when, based on our estimates, it is more likely than not that a portion of those assets will not be realized in a future period. The estimates utilized in recognition of deferred tax assets are subject to revision, either up or down, in future periods based on new facts or circumstances. We evaluate uncertain tax positions and record a liability as circumstances warrant.

Stock-Based Compensation. All share-based payments to employees, including grants of employee stock options, are recognized in the income statement based on their fair values. We use the Black-Scholes option-pricing model for measuring the fair value of stock options granted and recognize stock-based compensation based on the grant date fair value, net of an estimated forfeiture rate, for all share-based awards, on a straight-line basis over the vesting term. Performance-based restricted stock units are valued at the date of grant using the Monte Carlo valuation model.

Foreign Currency Translation. The functional currency for substantially all international subsidiaries is their respective local currency. Financial statements for these international subsidiaries are translated into U.S. dollars using the exchange rate at each balance sheet date for assets and liabilities and the average exchange rates in effect during the respective period for revenues and expenses. Exchange rate adjustments resulting from translation of foreign currency financial statements are reflected in accumulated other comprehensive loss in stockholders’ equity whereas exchange rate adjustments resulting from foreign currency denominated transactions are recorded in income. At December 31, 2014 and 2013, accumulated other comprehensive loss related to foreign subsidiaries reflected in stockholders’ equity amounted to $32.0 million and $9.5 million, respectively.

Derivative Financial Instruments. We monitor our exposure to various business risks including interest rates and foreign currency exchange rates and occasionally use derivative financial instruments to manage the impact of certain of these risks. At the inception of a new derivative, we designate the derivative as a cash flow or fair value hedge or we determine the derivative to be undesignated as a hedging instrument based on the underlying facts. We do not enter into derivative instruments for trading purposes.

Reclassifications. Certain prior year amounts have been reclassified to conform to the current year presentation.

New Accounting Standards. In April 2014, the Financial Accounting Standards Board (“FASB”) issued updated guidance that changes the criteria for reporting discontinued operations including enhanced disclosure requirements. Under the new guidance, only disposals representing a strategic shift in operations should be presented as discontinued operations. Those strategic shifts should have a major effect on the organization´s operations and financial results. The new guidance is effective for us in the first quarter of 2015; however, we do not expect the adoption to have a material effect on our consolidated financial statements.

In May 2014, the FASB amended the existing accounting standards for revenue recognition. The amendments are based on the principle that revenue should be recognized to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The new guidance is effective for us in the first quarter of 2017. Early adoption is not permitted. The amendments may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of initial application. We are currently evaluating the impact of these amendments and the transition alternatives on our consolidated financial statements.

Note 2 - Discontinued Operations

12 Months Ended

Dec. 31, 2014

Discontinued Operations and Disposal Groups [Abstract]

Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]

Note 2 — Discontinued Operations

In 2013, we initiated a process to sell our Environmental Services business, and in March of 2014 completed the sale of the business for $100 million in cash, subject to adjustment based on actual working capital conveyed at closing. Cash proceeds from the sale were $89.8 million in 2014, net of transaction related expenses, including the adjustment related to final working capital conveyed at closing. The agreement significantly limits our post-closing environmental obligations, including those related to the waste transfer and disposal facilities. In addition, $8 million of the sales price was withheld in escrow associated with transaction representations, warranties and indemnities, with $4 million scheduled to be released at each of the nine month and 18 month anniversary of the closing. In December 2014, the buyer made certain claims for indemnification under the terms of the agreement, which defers the release of the escrow funds until such claims are resolved. We believe the buyer’s claims are without merit and intend to vigorously pursue resolution. As a result of the sale transaction, we recorded a gain on the disposal of the business of $34.0 million ($22.1 million after-tax). All assets, liabilities and results of operations for this business have been classified as discontinued operations for all periods presented.

Summarized results of operations from discontinued operations are as follows:

	Year-ended December 31,
(In thousands)	2014		2013		2012

Revenues	$	11,744	$	65,002	$	54,066
Income from discontinued operations before income taxes		1,770		17,773		13,609
Income from discontinued operations, net of tax		1,152		12,701		9,579
Gain from disposal of discontinued operations before income taxes		33,974		-		-
Gain from disposal of discontinued operations, net of tax		22,117		-		-

Assets and liabilities of discontinued operations consisted of the following at December 31, 2013:

(In thousands)	2013

Receivables, net	$	11,915
Prepaid expenses and other current assets		1,188
Property, plant and equipment, net		62,333
Other assets		3,584
Assets of discontinued operations	$	79,020

Accounts payable	$	4,415
Accrued liabilities		1,542
Deferred tax liabilities		12,449
Other noncurrent liabilities		10,291
Liabilities of discontinued operations	$	28,697

- Definition

The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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+ Details

Note 3 - Inventories

12 Months Ended

Dec. 31, 2014

Inventory Disclosure [Abstract]

Inventory Disclosure [Text Block]

Note 3 — Inventories

Inventories consisted of the following items at December 31:

(In thousands)		2014		2013


Raw materials:
Drilling fluids	$	152,076	$	153,901
Mats		1,531		790
Total raw materials		153,607		154,691

Blended drilling fluids components		40,971		34,075

Finished goods- mats		1,978		914

Total	$	196,556	$	189,680

Raw materials consist primarily of barite, chemicals, and other additives that are consumed in the production of our drilling fluid systems. Our blended drilling fluids components consist of base drilling fluid systems that have been either mixed internally at our mixing plants or purchased from third party vendors. These base systems require raw materials to be added, as required to meet specified customer requirements.

Note 4 - Property, Plant and Equipment

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment Disclosure [Text Block]

Note 4 — Property, Plant and Equipment

Our investment in property, plant and equipment consisted of the following at December 31:

(In thousands)	2014			2013

Land	$	11,736		$	10,085
Buildings and improvements		98,492			86,660
Machinery and equipment		188,987			179,685
Computer hardware and software		27,431			25,360
Furnitures and fixtures		5,466			4,829
Construction in progress		40,628			12,667
		372,740			319,286
Less accumulated depreciation		(146,860	)		(137,702	)
		225,880			181,584

Composite mats (rental fleet)		90,321			60,332
Less accumulated depreciation-mats		(32,840	)		(24,906	)
		57,481			35,426

Property, plant and equipment, net	$	283,361		$	217,010

Depreciation expense was $33.2 million, $29.4 million and $25.7 million in 2014, 2013 and 2012, respectively.

In 2014, we incurred $28.8 million of capital expenditures to expand our mat manufacturing facility, located in Carencro, Louisiana. This expansion project is expected to be completed and placed into service in March of 2015. In addition, we recently announced two capital investment projects within the Fluids Systems segment. We are investing approximately $30 million to significantly expand existing capacity and upgrade the drilling fluids blending, storage and transfer capabilities in Fourchon, Louisiana, which serves the Gulf of Mexico deepwater market. This project is expected to be completed in early 2016. In addition, we are investing approximately $20 million in a new fluid blending facility and distribution center located in Conroe, Texas, which will support the increasing demand for our proprietary fluid technologies, including our Evolution systems. This project is expected to be completed by the end of 2015.

Note 5 - Goodwill and Other Intangible Assets

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets Disclosure [Text Block]

Note 5 — Goodwill and Other Intangible Assets

Changes in the carrying amount of goodwill by reportable segment are as follows:

(In thousands)	Fluids Systems			Mats and Integrated Services			Total

Balance at December 31, 2012	$	72,459		$	14,929		$	87,388
Acquisition		-			4,544			4,544
Purchase price adjustments		2,692			-			2,692
Effects of foreign currency		(560	)		-			(560	)
Balance at December 31, 2013		74,591			19,473			94,064
Effects of foreign currency		(1,907	)		(264	)		(2,171	)
Balance at December 31, 2014	$	72,684		$	19,209		$	91,893

We have evaluated the carrying values of our goodwill and other indefinite-lived intangible assets as of November 1, 2014. We determine any impairment of goodwill by comparing the carrying amounts of our reporting units with fair values, which we estimate using a combination of a market multiple and discounted cash flow approach. In completing this evaluation, we determined that no reporting unit has a fair value below its net carrying value and therefore, no impairment was required. As a result of the significant declines in oil prices and decreases in U.S. drilling activities subsequent to our November 1, 2014 evaluation date, we updated our fair value estimates based on our current forecasts and market conditions and determined that each reporting unit’s fair value remains in excess of its net carrying value.

Other intangible assets consist of the following:

	December 31, 2014							December 31, 2013
(In thousands)	Gross Carrying Amount		Accumulated Amortization			Intangible assets, net		Gross Carrying Amount		Accumulated Amortization			Intangible assets, net

Technology related	$	5,087	$	(3,277	)	$	1,810	$	5,318	$	(3,065	)	$	2,253
Customer related		35,910		(24,403	)		11,507		38,684		(17,892	)		20,792
Employment related		1,625		(650	)		975		2,238		(934	)		1,304
Total amortizing intangible assets		42,622		(28,330	)		14,292		46,240		(21,891	)		24,349

Permits and licenses		549		-			549		622		-			622
Trademarks		825		-			825		929		-			929
Total indefinite-lived intangible assets		1,374		-			1,374		1,551		-			1,551

Total intangible assets	$	43,996	$	(28,330	)	$	15,666	$	47,791	$	(21,891	)	$	25,900

Total amortization expense in 2014, 2013 and 2012 related to other intangible assets was $8.0 million, $10.4 million and $3.3 million, respectively.

Estimated future amortization expense for the years ended December 31 is as follows:

(In thousands)	2015		2016		2017		2018		2019		Thereafter		Total

Technology related	$	341	$	341	$	341	$	341	$	341	$	105	$	1,810
Customer related		3,970		2,651		2,025		1,026		730		1,105		11,507
Employment related		325		325		325		-		-		-		975
Total future amortization expense	$	4,636	$	3,317	$	2,691	$	1,367	$	1,071	$	1,210	$	14,292

The weighted average amortization period for technology related, customer related and employment related intangible assets is 15 years, 9 years and 5 years, respectively.

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Note 6 - Acquisitions

12 Months Ended

Dec. 31, 2014

Business Combinations [Abstract]

Business Combination Disclosure [Text Block]

Note 6 — Acquisitions

In December 2013, we completed the acquisition of Terrafirma Roadways (“Terrafirma”), a provider of temporary roadways and worksites based in the United Kingdom, for total cash consideration of $6.8 million, net of cash acquired. Additional consideration up to approximately $1.6 million may be payable based on the earnings of the business over the 18 month period following the acquisition. Prior to the acquisition, Terrafirma had been operating as a partner to the Company since 2008, developing a rental business with DURA-BASE^® composite mats, primarily focused in the utility industry in the U.K.

The transaction has been recorded using the acquisition method of accounting and accordingly, assets acquired and liabilities assumed were recorded at their fair values as of the acquisition date. The excess of the total consideration, including projected additional consideration, was recorded as goodwill and includes the value of the assembled workforce. The following table summarizes the amounts recognized for assets acquired and liabilities assumed as of the December 2013 acquisition date, including final adjustments to the purchase price allocation:

(In thousands)

Receivables, net	$	2,155
Property, plant and equipment, net		2,160
Goodwill		4,544
Other intangibles, net		3,328
Total assets acquired	$	12,187

Accounts payable	$	3,350
Short-term debt		284
Accrued liabilities		285
Deferred tax liability		1,092
Other noncurrent liabilities		400
Total liabilities assumed	$	5,411

Total cash conveyed at closing	$	6,776

Pro forma results of operation for the acquired business have not been presented as the effect of this acquisition is not material to our consolidated financial statements.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

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+ Details

Note 7 - Financing Arrangements

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Debt Disclosure [Text Block]

Note 7 — Financing arrangements

Financing arrangements consisted of the following at December 31, 2014 and 2013:

(In thousands)	2014			2013

Senior Notes	$	172,498		$	172,500
Revolving credit facility		-			-
Other		11,648			13,153
Total debt	$	184,146		$	185,653
Less: current portion		(11,648	)		(12,867	)
Long-term portion	$	172,498		$	172,786

Our financing arrangements include $172.5 million of unsecured convertible senior notes (“Senior Notes”) and a $125.0 million revolving credit facility (the “Credit Agreement”) which can be increased by $75.0 million for a maximum $200.0 million of capacity. The Senior Notes bear interest at a rate of 4.0% per year, payable semi-annually in arrears on April 1 and October 1 of each year. Holders may convert the Senior Notes at their option at any time prior to the close of business on the business day immediately preceding the October 1, 2017 maturity date. The conversion rate is initially 90.8893 shares of our common stock per $1,000 principal amount of Senior Notes (equivalent to an initial conversion price of $11.00 per share of common stock), subject to adjustment in certain circumstances. Upon conversion, the Senior Notes will be settled in shares of our common stock. In 2014, holders converted an insignificant amount of Senior Notes into shares of our common stock. We may not redeem the Senior Notes prior to their maturity date.

The Credit Agreement provides a $125.0 million revolving loan facility available for borrowings and letters of credit and expires in November 2016. Under the terms of the Credit Agreement, we can elect to borrow at an interest rate either based on LIBOR plus a margin based on our consolidated leverage ratio, ranging from 175 to 300 basis points, or at an interest rate based on the greatest of: (a) prime rate, (b) the federal funds rate in effect plus 50 basis points, or (c) the Eurodollar rate for a Eurodollar Loan with a one-month interest period plus 100 basis points, in each case plus a margin ranging from 75 to 200 basis points. The applicable margin on LIBOR borrowings on December 31, 2014 was 200 basis points. In addition, we are required to pay a commitment fee on the unused portion of the Credit Agreement of 37.5 basis points. The Credit Agreement contains customary financial and operating covenants, including a consolidated leverage ratio, a senior secured leverage ratio and an interest coverage ratio, and also prohibits the payment of dividends on our common stock. We were in compliance with these covenants as of December 31, 2014.

At December 31, 2014, we had no outstanding borrowings and $22.5 million of letters of credit issued and outstanding under the Credit Agreement, leaving $102.5 million of availability at December 31, 2014. Additionally, our foreign operations had $11.6 million outstanding under lines of credit and other borrowings, as well as $0.1 million outstanding in letters of credit.

The Credit Agreement is a senior secured obligation, secured by first liens on all of our U.S. tangible and intangible assets, including our accounts receivable and inventory. Additionally, a portion of the capital stock of our non-U.S. subsidiaries has also been pledged as collateral.

Our foreign subsidiaries, primarily those in Italy, Brazil and India maintain local credit arrangements consisting primarily of lines of credit with several banks, which are renewed on an annual basis. We utilize local financing arrangements in our foreign operations in order to provide short-term local liquidity needs, as well as to reduce the net investment in foreign operations subject to foreign currency risk. Advances under these short-term credit arrangements are typically based on a percentage of the subsidiary’s accounts receivable or firm contracts with certain customers. The weighted average interest rate under these arrangements was 15.1% and 14.1% on total outstanding balances of $11.4 million and $13.2 million at December 31, 2014 and 2013, respectively.

We incurred net interest expense of $10.4 million, $11.3 million, and $9.7 million for the years ended December 31, 2014, 2013 and 2012, respectively. Capitalized interest was $0.8 million for the year-ended December 31, 2014. Scheduled repayments of all long-term debt as of December 31, 2014 are as follows (in thousands):

2016	$	-
2017		172,498
2018		-
2019		-
Thereafter		-
Total	$	172,498

Note 8 - Fair Value of Financial Instruments and Concentrations of Credit Risk

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

Note 8 — Fair Value of Financial Instruments and Concentrations of Credit Risk

Fair Value of Financial Instruments

Our financial instruments include cash and cash equivalents, receivables, payables and debt. We believe the carrying values of these instruments, with the exception of our Senior Notes, approximated their fair values at December 31, 2014 and December 31, 2013. The estimated fair value of our Senior Notes was $192.3 million at December 31, 2014 and $231.2 million at December 31, 2013, based on quoted market prices at these respective dates.

Concentrations of Credit Risk

Financial instruments that potentially subject us to significant concentrations of credit risk consist principally of cash, trade accounts and notes receivable. At December 31, 2014, substantially all of our cash deposits are held in accounts at numerous financial institutions across the various regions that we operate in. A majority of the cash is held in accounts that maintain deposit ratings of P-1 by Moody’s, A-1 by Standard and Poor’s, and F1 by Fitch. As part of our investment strategy, we perform periodic evaluations of the relative credit standing of these financial institutions.

Accounts Receivable

Accounts receivable at December 31, 2014 and 2013 include the following:

(In thousands)		2014			2013

Gross trade receivables	$	299,962		$	252,168
Allowance for doubtful accounts		(5,458	)		(4,142	)
Net trade receivables		294,504			248,026

Other receivables		24,096			20,503

Total receivables, net	$	318,600		$	268,529

Other receivables include $14.5 million and $15.6 million for value added, goods and service taxes related to foreign jurisdictions and other tax related receivables as of December 31, 2014 and 2013, respectively. In addition, other receivables at December 31, 2014 include $8.0 million associated with the Environmental Services business proceeds held in escrow as described in Note 2 above.

We derive a significant portion of our revenues from companies in the E&P industry, and our customer base is highly concentrated in major and independent oil and gas E&P companies operating in the markets that we serve. During the years ended December 31, 2014, 2013 and 2012, revenues from our 20 largest customers represented approximately 40%, 50% and 40%, respectively, of our consolidated revenues from continuing operations, although no single customer accounted for more than 10% of our consolidated revenues.

We maintain an allowance for losses based upon the expected collectability of accounts receivable. Changes in this allowance for 2014, 2013 and 2012 related to continuing operations, was as follows:

(In thousands)		2014		2013			2012
Balance at beginning of year	$	4,142	$	3,950		$	3,149
Provision for uncollectible accounts		1,246		309			1,614
Write-offs, net of recoveries		70		(117	)		(813	)
Balance at end of year	$	5,458	$	4,142		$	3,950

The Consolidated Statements of Cash Flows included in this Item 8 of these Financial Statements and Supplementary Data also includes a provision for uncollectible accounts related to the Environmental Services business that is classified as discontinued operations in 2014, 2013 and 2012. However, these amounts were minimal for the periods presented.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Note 9 - Income Taxes

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

Income Tax Disclosure [Text Block]

Note 9 — Income Taxes

The provision for income taxes charged to continuing operations was as follows:

	Year Ended December 31,
(In thousands)	2014			2013			2012

Current tax expense (benefit):
U.S. Federal	$	17,086		$	24,275		$	19,020
State		2,170			1,595			1,602
Foreign		9,925			7,085			8,682
Total current		29,181			32,955			29,304

Deferred tax expense (benefit):
U.S. Federal		12,237			(2,057	)		(1,082	)
State		(174	)		(598	)		(1,219	)
Foreign		(196	)		(1,575	)		4,343
Total deferred		11,867			(4,230	)		2,042

Total provision	$	41,048		$	28,725		$	31,346

The total provision was allocated to the following components of income:

	Year Ended December 31,
(In thousands)	2014		2013		2012

Income from continuing operations	$	41,048	$	28,725	$	31,346
Income from discontinued operations		12,475		5,072		4,030

Total provision	$	53,523	$	33,797	$	35,376

Income from continuing operations before income taxes was as follows:

	Year Ended December 31,
(In thousands)	2014		2013		2012

U.S.	$	88,964	$	65,310	$	54,603
Foreign		31,093		16,037		27,196
Income from continuing operations before income taxes	$	120,057	$	81,347	$	81,799

The effective income tax rate is reconciled to the statutory federal income tax rate as follows:

	Year Ended December 31,
	2014			2013			2012


Income tax expense at federal statuatory rate		35.0	%		35.0	%		35.0	%
Nondeductible expenses		2.9	%		4.3	%		1.9	%
Manufacturing deduction		(1.9	%)		(2.5	%)		(2.2	%)
Different rates on earnings of foreign operations		(4.3	%)		(4.6	%)		(3.4	%)
Change in valuation allowance		2.1	%		3.0	%		(2.1	%)
Uncertain tax positions		0.6	%		(0.8	%)		1.9	%
Foreign tax withholdings		0.4	%		0.2	%		5.2	%
State tax expense, net		1.0	%		0.5	%		1.5	%
Other		(1.6	%)		0.2	%		0.5	%

Total income tax expense		34.2	%		35.3	%		38.3	%

The Company’s effective tax rate has been positively impacted by lower tax rates in certain foreign jurisdictions such as Romania and Algeria. The 2012 provision for income taxes included a $3.9 million charge associated with a tax assessment and related increase in tax rate for the period of 2006 through 2012 in a foreign subsidiary.

Temporary differences and carryforwards which give rise to deferred tax assets and liabilities at December 31, 2014 and 2013 are as follows:

(In thousands)	2014			2013

Deferred tax assets:
Net operating losses	$	15,097		$	16,064
Accruals not currently deductible		14,868			12,901
Unrealized foreign exchange		3,145			-
Bad debts		597			1,166
Foreign tax credits		862			1,653
Capitalized inventory costs and other		4,867			4,135
Total deferred tax assets		39,436			35,919
Valuation allowance		(15,353	)		(15,024	)
Total deferred tax assets, net of allowances		24,083			20,895

Deferred tax liabilities:
Accelerated depreciation and amortization		(40,308	)		(29,530	)
Tax on unremitted earnings		(6,680	)		(6,169	)
Other		(3,025	)		(1,607	)
Total deferred tax liabilities		(50,013	)		(37,306	)

Total net deferred tax liabilities	$	(25,930	)	$	(16,411	)

Current portion of deferred tax assets	$	11,013		$	11,272
Non current portion of deferred tax assets		1,258			119
Current portion of deferred tax liabilities		(507	)		(742	)
Non current portion of deferred tax liabilities		(37,694	)		(27,060	)
Net deferred tax liabilities	$	(25,930	)	$	(16,411	)

For state income tax purposes, we have net operating loss carryforwards (“NOLs”) of approximately $186.4 million available to reduce future state taxable income. These NOLs expire in varying amounts beginning in year 2015 through 2030. Foreign NOLs of approximately $18.6 million are available to reduce future taxable income, some of which expire beginning in 2015.

The realization of our net deferred tax assets is dependent on our ability to generate taxable income in future periods. At December 31, 2014 and December 31, 2013, we have recorded a valuation allowance in the amount of $15.4 million and $15.0 million, respectively, related to state and foreign NOL carryforwards.

Unremitted foreign earnings permanently reinvested abroad upon which deferred income taxes have not been provided aggregated approximately $133.3 million and $112.6 million at December 31, 2014 and 2013, respectively. It is not practicable to determine the amount of federal income taxes, if any, that might become due if such earnings are repatriated. We have the ability and intent to leave these foreign earnings permanently reinvested abroad.

We file income tax returns in the United States and several non-U.S. jurisdictions and are subject to examination in the various jurisdictions in which we file. We are no longer subject to income tax examinations for U.S. federal and substantially all state jurisdictions for years prior to 2010 and for substantially all foreign jurisdictions for years prior to 2007. We are under examination by various United States federal and state tax authorities and tax authorities in other countries. We fully cooperate with all audits, but defend existing positions vigorously. These audits are in various stages of completion and certain foreign jurisdictions have challenged the amount of taxes due for certain tax periods. We evaluate the potential exposure associated with various filing positions and record a liability for tax contingencies as circumstances warrant. Although we believe all tax positions are reasonable and properly reported in accordance with applicable tax laws and regulations in effect during the periods involved, the final determination of tax audits and any related litigation could be materially different than that which is reflected in historical income tax provisions and tax contingency accruals.

A reconciliation of the beginning and ending provision for uncertain tax positions is as follows:

(In thousands)	2014		2013			2012

Balance at January 1	$	2,175	$	2,753		$	1,218
Additions (reductions) for tax positions of prior years		1,604		(650	)		1,350
Additions for tax positions of current year		7		72			185
Balance at December 31	$	3,786	$	2,175		$	2,753

Approximately $3.3 million of unrecognized tax benefits at December 31, 2014, if recognized, would favorably impact the effective tax rate, including $2.2 million for which the tax statutes are scheduled to expire during the next 12 months.

The Company recognizes accrued interest and penalties related to uncertain tax positions in operating expenses. During the year ended December 31, 2014 and 2012, the Company recognized approximately $0.2 million and $0.4 million, respectively in interest and penalties. In 2013, there was no interest and penalties recognized. The Company had approximately $0.4 million and $0.2 million for interest and penalties accrued at December 31, 2014 and 2013, respectively.

Note 10 - Capital Stock

12 Months Ended

Dec. 31, 2014

Stockholders' Equity Note [Abstract]

Stockholders' Equity Note Disclosure [Text Block]

Note 10 — Capital Stock

Common stock

Changes in outstanding Common Stock for the years ended December 31, 2014, 2013 and 2012 were as follows:

(In thousands of shares)	2014		2013		2012

Outstanding, beginning of year		98,031		95,734		94,498
Shares issued upon exercise of options		540		1,386		286
Shares issued for grants of time vested restricted stock (net of cancellations)		633		911		950

Outstanding, end of year		99,204		98,031		95,734

Preferred stock

We are authorized to issue up to 1,000,000 shares of Preferred Stock, $0.01 par value. There was no outstanding preferred stock at December 31, 2014, 2013 or 2012.

Treasury stock

During 2014, 2013 and 2012, we repurchased 215,760, 222,175 and 104,995 shares, respectively, for an aggregate price of $2.5 million, $2.6 million and $0.6 million, respectively, representing employee shares surrendered in lieu of taxes under vesting of restricted stock awards. All of the shares repurchased are held as treasury stock.

During 2014, 155,650 shares of treasury stock were re-issued including 73,801 shares pursuant to our employee stock purchase plan and 81,849 shares issued to non-employee directors under the 2014 Non-Employee Directors’ Restricted Stock Plan. During 2013 and 2012, 67,622 and 34,724 shares of treasury stock were re-issued, respectively, pursuant to our employee stock purchase plan.

Share repurchase program

In February 2012, our Board of Directors approved a share repurchase program that authorized the repurchase of up to $50.0 million of the Company’s outstanding shares of common stock that was fully executed in 2012.

In April 2013, our Board of Directors approved a share repurchase program that authorizes the Company to purchase up to $50.0 million of its outstanding shares of common stock. This authorization was subsequently increased to $100.0 million in February 2014. These purchases are funded with a combination of cash generated from operations, proceeds from the March 2014 sale of the Environmental Services business and borrowings under the Company’s revolving credit facility. The repurchase program has no specific term. The Company may repurchase shares in the open market or as otherwise determined by management, subject to market conditions, business opportunities and other factors. As part of the share repurchase program, the Company’s management has been authorized to establish trading plans under Rule 10b5-1 of the Securities Exchange Act of 1934.

During the years ended December 31, 2014, 2013 and 2012, we repurchased shares of the Company’s common stock under these share repurchase programs totaling 4,317,278, 562,341 and 7,241,693 shares, respectively for an average price per share, including commissions, of $11.72, $11.94 and $6.92, respectively. As of December 31, 2014, we had $42.7 million remaining under the current authorization program.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 15: http://www.xbrl.org/2003/role/presentationRef
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Reference 16: http://www.xbrl.org/2003/role/presentationRef
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Reference 17: http://www.xbrl.org/2003/role/presentationRef
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Reference 18: http://www.xbrl.org/2003/role/presentationRef
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Reference 19: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Note 11 - Earnings Per Share

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Note 11 — Earnings per Share

The following table presents the reconciliation of the numerator and denominator for calculating earnings per share from continuing operations:

	Year Ended December 31,
(In thousands, except per share data)	2014		2013		2012

Basic EPS:
Income from continuing operations	$	79,009	$	52,622	$	50,453

Weighted average number of common shares outstanding		82,999		85,095		87,522

Basic income from continuing operations per common share	$	0.95	$	0.62	$	0.58


Diluted EPS:
Income from continuing operations	$	79,009	$	52,622	$	50,453
Assumed conversions of Senior Notes		5,091		5,005		4,771
Adjusted income from continuing operations	$	84,100	$	57,627	$	55,224

Weighted average number of common shares outstanding-basic		82,999		85,095		87,522
Add: Dilutive effect of stock options and restricted stock awards		1,733		1,767		876
Dilutive effect of Senior Notes		15,682		15,682		15,682

Diluted weighted average number of common shares outstanding		100,414		102,544		104,080

Diluted income from continuing operations per common share	$	0.84	$	0.56	$	0.53

Stock options and restricted stock excluded from calculation of diluted earnings per share because anti-dilutive for the period		788		415		2,671

Note 12 - Stock Based Compensation and Other Benefit Plans

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Disclosure of Compensation Related Costs, Share-based Payments [Text Block]

Note 12 — Stock Based Compensation and Other Benefit Plans

The following describes stockholder approved plans utilized by the Company for the issuance of stock based awards.

2014 Non-Employee Directors’ Restricted Stock Plan

In May 2014, our stockholders approved the 2014 Non-Employee Directors’ Restricted Stock Plan (the “2014 Director Plan”) which authorizes grants of restricted stock to non-employee directors based on a pre-determined dollar amount on the date of each annual meeting of stockholders. The pre-determined dollar amount for determining the number of restricted shares granted is subject to change by the Board of Directors or its committee but is initially set at $150,000 for each non-employee director, except for the Chairman of the Board who will receive an annual grant of restricted shares equal to $170,000. Each restricted share granted to a non-employee director vests in full on the earlier of the day prior to the next annual meeting of stockholders following the grant date or the first anniversary of the grant. During 2014, non-employee directors received shares of restricted stock totaling 81,849 shares at a weighted average fair value on the date of grant of $11.24 per share.

The maximum number of shares of common stock issuable under the 2014 Director Plan is 1,000,000 leaving 918,151 shares available for grant as of December 31, 2014. The 2014 Director Plan completely replaced the Amended and Restated Non-Employee Directors’ Restricted Stock Plan, which expired under its terms on March 9, 2014 with no further issuances being made under that plan after December 31, 2013.

2006 Equity Incentive Plan

In December 2006, our stockholders approved the 2006 Equity Incentive Plan ( “2006 Plan”), pursuant to which the Compensation Committee of our Board of Directors (“Compensation Committee”) may grant to key employees, including executive officers and other corporate and divisional officers, a variety of forms of equity-based compensation, including options to purchase shares of common stock, shares of restricted common stock, restricted stock units, stock appreciation rights, other stock-based awards, and performance-based awards. In 2013, the 2006 Plan was amended to increase the number of shares available for issuance to 12,250,000 shares. At December 31, 2014, 2,247,611 shares remained available for award under the 2006 Plan, as amended.

The Compensation Committee approves the granting of all stock based compensation to employees, utilizing shares available under the 2006 Plan. Activity under each of these programs is described below.

Stock Options & Cash-Settled Stock Appreciation Rights

Stock options granted by the Compensation Committee are generally granted with a three year vesting period and a term of ten years. During 2014, 554,641 options were granted with a three year vesting period and a ten year term. The exercise price of each stock option granted was equal to the fair market value on the date of grant.

The following table summarizes activity for our outstanding stock options for the year ended December 31, 2014:

	Shares			Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value

Outstanding at beginning of period		3,449,367		$	6.94
Granted		554,641			11.20
Exercised		(540,318	)		6.37
Expired or cancelled		(121,675	)		8.87
Outstanding at end of period		3,342,015		$	7.67		6.49	$	7,932,450

Vested or expected to vest at end of period		3,293,925		$	7.62		6.45	$	7,920,816
Options exercisable at end of period		2,135,599		$	6.69		5.36	$	6,361,350

We estimated the fair value of options granted on the date of grant using the Black-Scholes option-pricing model, with the following weighted average assumptions:

	Year Ended December 31,
	2014			2013			2012

Risk-free interest rate		1.53	%		1.02	%		0.68	%
Expected life of the option in years		5.22			5.22			5.22
Expected volatility		48.6	%		53.7	%		60.3	%
Dividend yield		-			-			-

The risk-free interest rate is based on the implied yield on a U.S. Treasury zero-coupon issue with a remaining term equal to the expected term of the option. The expected life of the option is based on observed historical patterns. The expected volatility is based on historical volatility of the price of our common stock. The dividend yield is based on the projected annual dividend payment per share divided by the stock price at the date of grant, which is zero because we have not paid dividends for several years and do not expect to pay dividends in the foreseeable future.

The following table summarizes information about the weighted-average exercise price and the weighted-average grant date fair value of stock options granted:

	Year Ended December 31,
	2014		2013		2012

Weighted-average exercise price of the stock on the date of grant	$	11.20	$	11.43	$	5.57
Weighted-average grant date fair value on the date of grant	$	4.97	$	5.42	$	2.89

All stock options granted for the years ended December 31, 2014, 2013 and 2012 reflected an exercise price equal to the market value of the stock on the date of grant.

The total intrinsic value of options exercised was $3.2 million, $6.1 million and $1.0 million for the years ended December 31, 2014, 2013 and 2012, while cash from option exercises totaled $3.4 million, $8.3 million and $1.1 million, respectively.

The following table summarizes activity for outstanding cash-settled stock appreciation rights for the year-ended December 31, 2014:

	Rights

Outstanding at beginning of period		134,833
Exercised		(26,200	)
Expired or cancelled		(1,500	)
Outstanding at end of period		107,133

Exercisable at end of period		107,133

During 2014, there were no additional grants of cash-settled stock appreciation rights. The remaining outstanding cash-settled stock appreciation rights, if exercised, will ultimately be settled in cash for the difference between market value of our outstanding shares at the date of exercise, and $7.89. As such, the projected cash settlement is adjusted each period based upon the ending fair market value of the underlying stock. At December 31, 2014, the fair market value of each cash-settled stock appreciation right was $2.62, resulting in a liability of $0.3 million.

Total compensation cost recognized for stock options and cash-settled stock appreciation rights during the years ended December 31, 2014, 2013 and 2012 was $2.6 million, $3.3 million and $2.3 million, respectively. For the years ended December 31, 2014, 2013 and 2012, we recognized tax benefits resulting from the exercise of stock options totaling $1.0 million, $1.9 million and $0.3 million, respectively.

Performance-Based Restricted Stock Units & Cash-Settled Performance-Based Restricted Stock Units

The Compensation Committee may use various business criteria to set the performance objectives for awards of performance-based restricted stock units. During 2014 and 2013, performance-based awards were awarded to executive officers. The performance-based restricted stock units will be settled in shares of common stock and will be based on the relative ranking of the Company’s total shareholder return (“TSR”) as compared to the TSR of the Company’s designated peer group over a three year period. During 2014, a total of 110,497 performance-based restricted stock units at target were granted with the payout of shares for each executive ranging from 0%-150% of target. The performance period began June 1, 2014 and ends May 31, 2017, with the ending TSR price being equal to the average closing price of our shares over the 30-calendar days ending May 31, 2017. During 2013, a total of 149,532 performance-based restricted stock units were granted with the payout of shares for each executive ranging from 0%-150% of target. The performance period began May 3, 2013 and ends June 1, 2016, with the ending TSR price being equal to the average closing price of our shares over the 30-calendar days ending June 1, 2016. No performance-based awards were granted during 2012.

The following table summarizes activity for outstanding performance-based restricted stock units for the year-ended December 31, 2014:

				Weighted-Average
				Grant Date
Nonvested Shares (Performance-Based)	Shares			Fair Value

Outstanding at beginning of period		149,532		$	13.11
Granted		110,497			12.55
Forfeited		(61,581	)		13.04
Outstanding at the end of period		198,448		$	12.82

	Year Ended December 31,
	2014		2013

Estimated fair value at date of grant	$	12.55	$	13.11

We estimated the fair value of each restricted stock unit at the date of grant using the Monte Carlo valuation model, with the following weighted average assumptions:

	Year Ended December 31,
	2014			2013

Risk-free interest rate		0.81	%		0.52	%
Average closing price	$	11.28	⁽¹⁾	$	11.33	⁽²⁾
Expected volatility		44.5	%		53.6	%
Dividend yield		-			-

(1) Average closing price of our shares over the 30-calendar days ending May 16, 2014.

(2) Average closing price of our shares over the 30-calendar days ending June 3, 2013.

During 2014 and 2013, $0.5 million and $0.4 million in compensation cost was recognized for performance-based restricted stock units, respectively, while no compensation cost was recognized during the year ended 2012.

Restricted Stock Awards and Units

Time-vested restricted stock awards and restricted stock units are periodically granted to key employees, including grants for employment inducements, as well as to members of our Board of Directors. Employee awards provide for vesting periods ranging from three to four years. Non-employee director grants vest in full on the earlier of the day prior to the next annual meeting of stockholders following the grant date or the first anniversary of the grant. Upon vesting of these grants, shares are issued to award recipients. The following tables summarize the activity for our outstanding time-vested restricted stock awards and restricted stock units for the year-ended December 31, 2014.

				Weighted-Average
				Grant Date
Nonvested Shares (Time-Vesting)	Shares			Fair Value

Nonvested at January 1, 2014		1,772,854		$	9.52
Granted		754,477			11.21
Vested		(691,650	)		8.71
Forfeited		(112,782	)		9.79
Nonvested at December 31, 2014		1,722,899		$	10.58

				Weighted-Average
				Grant Date
Nonvested Share Units (Time-Vesting)	Shares			Fair Value

Nonvested at January 1, 2014		150,988		$	7.84
Granted		89,737			11.20
Vested		(73,135	)		11.77
Forfeited		(8,712	)		11.10
Nonvested at December 31, 2014		158,878		$	10.22

Total compensation cost recognized for restricted stock awards and restricted stock units was $8.6 million, $6.7 million and $4.6 million for the years ended December 31, 2014, 2013 and 2012 respectively. Total unrecognized compensation cost at December 31, 2014 related to restricted stock awards and restricted stock units is approximately $13.3 million which is expected to be recognized over the next 2.1 years. During the years ended December 31, 2014, 2013 and 2012, the total fair value of shares vested was $9.0 million, $9.5 million and $2.5 million, respectively.

For the years ended December 31, 2014, 2013 and 2012, we recognized tax benefits resulting from the vesting of restricted share awards totaling $2.8 million, $3.0 million and $0.9 million, respectively.

Defined Contribution Plan

Substantially all of our U.S. employees are covered by a defined contribution plan (“401(k) Plan”). Employees may voluntarily contribute up to 50% of compensation, as defined in the 401(k) Plan. Participants’ contributions, up to 3% of compensation, are matched 100% by us, and the participants’ contributions, from 3% to 6% of compensation, are matched 50% by us. Under the 401(k) Plan, our cash contributions were $3.6 million, $3.4 million and $3.3 million in 2014, 2013 and 2012, respectively.

Note 13 - Segment and Related Information

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

Note 13 — Segment and Related Information

Our Company consists of two reportable segments, which offer different products and services to a relatively homogenous customer base. The reportable segments include: Fluids Systems and Mats and Integrated Services. In March of 2014, we completed the sale of our Environmental Services business, which was previously reported as a third operating segment and is now reflected as discontinued operations. All assets, liabilities and results of operations for this business have been classified as discontinued operations for all periods presented. Intersegment revenues are generally recorded at cost for items which are included in inventory of the purchasing segment, and at standard markups for items which are included in cost of revenues of the purchasing segment. All intersegment revenues and related profits have been eliminated.

Fluids Systems — Our Fluids Systems business offers customized solutions including highly technical drilling projects involving complex subsurface conditions, such as horizontal, directional, geologically deep or deep water drilling. These projects require increased monitoring and critical engineering support of the fluids system during the drilling process. We provide drilling fluids products and technical services to markets in North America, EMEA, Latin America, and the Asia Pacific regions.

We also have industrial mineral grinding operations for barite, a critical raw material in drilling fluids products, which serve to support our activity in the drilling fluids market. We grind barite and other industrial minerals at facilities in Houston and Corpus Christi, Texas, New Iberia, Louisiana and Dyersburg, Tennessee. We use the resulting products in our drilling fluids business, and also sell them to third party users, including other drilling fluids companies. We also sell a variety of other minerals, principally to third party industrial (non oil and gas) markets, from our main plant in Houston, Texas and from the plant in Dyersburg, Tennessee.

Mats and Integrated Services — We manufacture our DURA-BASE^® Advanced Composite Mats for use in our rental operations as well as for third party sales. Our mats provide environmental protection and ensure all-weather access to sites with unstable soil conditions. We sell composite mats direct to customers in areas around the world where we do not maintain an infrastructure for our mat rental activities. In addition, we provide mat rentals to E&P customers in the Northeast U.S., onshore U.S. Gulf Coast, and Rocky Mountain Regions, and to non-E&P customers in the U.S., Canada and the United Kingdom. We also offer location construction and related well site services to E&P customers in the Gulf Coast Region.

Historically, our marketing efforts for the sale of composite mats remained focused in principal oil and gas industry markets outside the U.S., including the Asia Pacific, Latin America and EMEA regions, as well as markets outside the E&P sector in the U.S. and Europe. We believe these mats have worldwide applications outside our traditional oilfield market, primarily in infrastructure construction, maintenance and upgrades of pipelines and electric utility transmission lines, and as temporary roads for movement of oversized or unusually heavy loads. In late 2013, we announced plans to significantly expand our manufacturing facility, in order to support our efforts to expand our markets, globally. This project is expected to be substantially completed in March of 2015, and will nearly double our current manufacturing capacity.

Summarized financial information concerning our reportable segments is shown in the following tables:

	Year Ended December 31,
(In thousands)	2014			2013			2012

Revenues
Fluids Systems	$	965,049		$	926,392		$	861,670
Mats and Integrated Services		153,367			115,964			122,283
Total Revenues	$	1,118,416		$	1,042,356		$	983,953

Depreciation and Amortization
Fluids Systems	$	22,934		$	26,679		$	18,419
Mats and Integrated Services		15,507			10,501			7,952
Corporate Office		2,734			2,584			2,575
Total Depreciation and Amortization	$	41,175		$	39,764		$	28,946

Operating Income (loss)
Fluids Systems	$	95,600		$	72,604		$	59,987
Mats and Integrated Services		70,526			49,394			54,251
Corporate Office		(35,530	)		(27,553	)		(21,963	)
Operating Income	$	130,596		$	94,445		$	92,275

Segment Assets
Fluids Systems	$	778,148		$	733,340		$	790,147
Mats and Integrated Services		175,318			112,619			81,252
Assets of discontinued operations		-			79,020			79,276
Corporate		66,656			43,438			43,866
Total Assets	$	1,020,122		$	968,417		$	994,541

Capital Expenditures
Fluids Systems	$	36,626		$	39,316		$	27,916
Mats and Integrated Services		64,101			26,455			8,174
Corporate		5,215			464			6,307
Total Capital Expenditures	$	105,942		$	66,235		$	42,397

The Consolidated Statements of Cash Flows included in this Item 8 of these Financial Statements and Supplementary Data include $0.9 million, $4.4 million and $3.9 million in depreciation and amortization expense and capital expenditures of $1.0 million, $1.7 million and $1.6 million related to operations that are classified as discontinued operations as of December 31, 2014, 2013 and 2012, respectively.

The following table sets forth information about our operations by geographic area. Revenues by geographic location are determined based on the operating location from which services are rendered or products are sold.

	Year Ended December 31,
(In thousands)	2014		2013		2012

Revenue
United States	$	748,845	$	717,263	$	684,084
Canada		79,516		47,559		48,643
EMEA		177,244		141,535		121,175
Latin America and Mexico		85,244		99,587		88,157
Asia Pacific		27,567		36,412		41,894
Total Revenue	$	1,118,416	$	1,042,356	$	983,953

Long-Lived Assets
United States	$	296,799	$	250,724	$	237,751
Canada		10,044		10,862		11,830
EMEA		55,560		44,262		30,729
Latin America and Mexico		6,635		9,852		11,158
Asia Pacific		25,991		27,241		31,539
Total Long-Lived Assets	$	395,029	$	342,941	$	323,007

No single customer accounted for more than 10% of our consolidated revenues for the years ended December 31, 2014, 2013 or 2012.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
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-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9031-108599

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9054-108599

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8538-108599

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 29
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8864-108599

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599

+ Details

Note 14 - Supplemental Cash Flow and Other Information

12 Months Ended

Dec. 31, 2014

Supplemental Cash Flow Elements [Abstract]

Cash Flow, Supplemental Disclosures [Text Block]

Note 14 — Supplemental Cash Flow and Other Information

Accounts payable and accrued liabilities at December 31, 2014, 2013, and 2012, included accruals for capital expenditures of $1.2 million, $1.5 million, and $1.0 million, respectively.

Accrued liabilities at December 31, 2014 and 2013 were $53.3 million and $46.3 million respectively. The balance at December 31, 2014 and December 31, 2013 included $25.9 million and $17.4 million for employee incentives and other compensation related expenses, respectively.

During the years ended December 31, 2014, 2013 and 2012, we did not finance the acquisition of property, plant and equipment with capital leases.

Note 15 - Commitments and Contingencies

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies Disclosure [Text Block]

Note 15 — Commitments and Contingencies

In the ordinary course of conducting our business, we become involved in litigation and other claims from private party actions, as well as judicial and administrative proceedings involving governmental authorities at the federal, state and local levels. During the second quarter of 2014, a lawsuit was filed by Jesse Davida, a former employee, in Federal Court in Texas against Newpark Drilling Fluids LLC, alleging violations of the Fair Labor Standards Act (“FLSA”). The plaintiff seeks damages and penalties for the Company’s alleged failure to: properly classify its field service employees as “non-exempt” under the FLSA; and pay them on an hourly basis (including overtime). The plaintiff seeks recovery on his own behalf, and seeks certification of a class of similarly situated employees. The Court has conditionally certified a class of plaintiffs as those working as fluid service technicians for Newpark Drilling Fluids for the past 3 years. The form of the notice to be sent to the class has been approved by the court and the members of the class will be given the opportunity to “opt-in” to the litigation. A second case was filed by Josh Christensen in the fourth quarter of 2014, in Federal Court in Texas alleging that individuals treated as independent contractors should have been classified as employees and, as such, are entitled to assert claims for alleged violations of the FLSA (similar to the claims asserted in the Davida matter). Similar cases have been filed against other companies in the oil and gas services industry, including some of our competitors. We are monitoring developments in those cases as well. Because these cases remain in the early stages, we cannot predict with any degree of certainty the outcome of the litigation at this time and, as a result, cannot estimate any possible loss or range of loss. In the opinion of management, any liability in these matters should not have a material effect on our consolidated financial statements.

Leases

We lease various manufacturing facilities, warehouses, office space, machinery and equipment, including transportation equipment, under operating leases with remaining terms ranging from one to eleven years, with various renewal options. Substantially all leases require payment of taxes, insurance and maintenance costs in addition to rental payments. Total rental expenses for all operating leases were approximately $25.5 million, $24.5 million and $21.3 million for the years ending 2014, 2013 and 2012, respectively.

Future minimum payments under non-cancelable operating leases, with initial or remaining terms in excess of one year are included in the table below. Future minimum payments under capital leases are not significant.

(In thousands)
2015	$	8,441
2016		6,147
2017		4,887
2018		3,663
2019		2,934
Thereafter		10,499
	$	36,571

Other

In conjunction with our insurance programs, we had established letters of credit in favor of certain insurance companies in the amount of $3.5 million and $4.0 million at December 31, 2014 and 2013, respectively. We also had $0.4 million and $9.9 million in guarantee obligations in connection with facility closure bonds and other performance bonds issued by insurance companies outstanding as of December 31, 2014 and 2013. The December 31, 2013 balance included $9.3 million in guarantee obligations related to our Environmental Services business that was sold in March 2014.

Other than normal operating leases for office and warehouse space, rolling stock and other pieces of operating equipment, we do not have any off-balance sheet financing arrangements or special purpose entities. As such, we are not materially exposed to any financing, liquidity, market or credit risk that could arise if we had engaged in such financing arrangements.

We are self-insured for health claims, subject to certain “stop loss” insurance policies. Claims in excess of $225,000 per incident are insured by third-party insurers. We had accrued liabilities of $1.8 million and $1.2 million for unpaid claims incurred, based on historical experience at December 31, 2014 and 2013, respectively. Substantially all of these estimated claims are expected to be paid within six months of their occurrence.

We are self-insured for certain workers’ compensation, auto and general liability claims up to a certain policy limit. Claims in excess of $750,000 are insured by third-party reinsurers. At December 31, 2014 and 2013, we had accrued liabilities of $2.4 million and $2.5 million, respectively, for the uninsured portion of claims.

We maintain accrued liabilities for asset retirement obligations, which represent obligations associated with the retirement of tangible long-lived assets that result from the normal operation of the long-lived asset. Our asset retirement obligations primarily relate to required expenditures associated with owned and leased facilities. Upon settlement of the liability, a gain or loss for any difference between the settlement amount and the liability recorded is recognized. As of December 31, 2014 and 2013, we had accrued asset retirement obligations of $0.6 million and $3.3 million, respectively. The December 31, 2013 balance included $2.9 million in obligations reported related to our Environmental Services business that was sold in March 2014.

Note 16 - Supplemental Selected Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information [Text Block]

Note 16 — Supplemental Selected Quarterly Financial Data (Unaudited)

	Quarter Ended
(In thousands, except per share amounts)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter

Fiscal Year 2014
Revenues	$	242,824	$	272,466	$	296,964	$	306,162
Operating income		20,757		31,816		39,432		38,591
Income from continuing operations		11,742		20,329		23,492		23,446
Net income		35,011		20,329		23,492		23,446

Income per common share -basic:
Income from continuing operations		0.14		0.24		0.29		0.29
Net income		0.41		0.24		0.29		0.29

Income per common share -diluted:
Income from continuing operations		0.13		0.21		0.25		0.25
Net income		0.36		0.21		0.25		0.25


Fiscal Year 2013
Revenues	$	267,923	$	259,376	$	268,132	$	246,925
Operating income		24,861		21,596		25,645		22,343
Income from continuing operations		14,867		11,859		15,431		10,465
Net income		17,375		15,664		18,760		13,524

Income per common share -basic:
Income from continuing operations		0.18		0.14		0.18		0.12
Net income		0.21		0.19		0.22		0.16

Income per common share -diluted:
Income from continuing operations		0.16		0.13		0.16		0.11
Net income		0.18		0.17		0.20		0.14

Accounting Policies, by Policy (Policies)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Consolidation, Policy [Policy Text Block]

Use of Estimates, Policy [Policy Text Block]

Cash and Cash Equivalents, Policy [Policy Text Block]

Cash Equivalents. All highly liquid investments with a remaining maturity of three months or less at the date of acquisition are classified as cash equivalents.

Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block]

Revenue Recognition, Sales Returns [Policy Text Block]

Inventory, Policy [Policy Text Block]

Property, Plant and Equipment, Policy [Policy Text Block]

Years
Computer hardware and office equipment				3-5
Computer software				3-10
Autos & light trucks				5-7
Furniture, fixtures & trailers				7-10
Composite mats (rental fleet)				7-12
Machinery and heavy equipment				5-15
Owned buildings				20-39
Leasehold improvements				Lease term, including reasonably assured renewal periods

Goodwill and Intangible Assets, Policy [Policy Text Block]

Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block]

Self Insurance Reserve [Policy Text Block]

Stockholders' Equity, Policy [Policy Text Block]

Treasury Stock. Treasury stock is carried at cost, which includes the entire cost of the acquired stock.

Revenue Recognition, Policy [Policy Text Block]

Shipping and handling costs are reflected in cost of revenues, and all reimbursements by customers of shipping and handling costs are included in revenues.

Income Tax, Policy [Policy Text Block]

Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]

Foreign Currency Transactions and Translations Policy [Policy Text Block]

Derivatives, Policy [Policy Text Block]

Reclassification, Policy [Policy Text Block]

Reclassifications. Certain prior year amounts have been reclassified to conform to the current year presentation.

New Accounting Pronouncements, Policy [Policy Text Block]

Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Estimated Useful Lives [Member]

Note 1 - Summary of Significant Accounting Policies (Tables) [Line Items]

Property, Plant and Equipment [Table Text Block]

Years
Computer hardware and office equipment				3-5
Computer software				3-10
Autos & light trucks				5-7
Furniture, fixtures & trailers				7-10
Composite mats (rental fleet)				7-12
Machinery and heavy equipment				5-15
Owned buildings				20-39
Leasehold improvements				Lease term, including reasonably assured renewal periods

Property, Plant and Equipment [Table Text Block]

(In thousands)	2014			2013

Land	$	11,736		$	10,085
Buildings and improvements		98,492			86,660
Machinery and equipment		188,987			179,685
Computer hardware and software		27,431			25,360
Furnitures and fixtures		5,466			4,829
Construction in progress		40,628			12,667
		372,740			319,286
Less accumulated depreciation		(146,860	)		(137,702	)
		225,880			181,584

Composite mats (rental fleet)		90,321			60,332
Less accumulated depreciation-mats		(32,840	)		(24,906	)
		57,481			35,426

Property, plant and equipment, net	$	283,361		$	217,010

Note 2 - Discontinued Operations (Tables)

12 Months Ended

Dec. 31, 2014

Income Statement [Member]

Note 2 - Discontinued Operations (Tables) [Line Items]

Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]

	Year-ended December 31,
(In thousands)	2014		2013		2012

Revenues	$	11,744	$	65,002	$	54,066
Income from discontinued operations before income taxes		1,770		17,773		13,609
Income from discontinued operations, net of tax		1,152		12,701		9,579
Gain from disposal of discontinued operations before income taxes		33,974		-		-
Gain from disposal of discontinued operations, net of tax		22,117		-		-

Balance Sheet [Member]

Note 2 - Discontinued Operations (Tables) [Line Items]

Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]

(In thousands)	2013

Receivables, net	$	11,915
Prepaid expenses and other current assets		1,188
Property, plant and equipment, net		62,333
Other assets		3,584
Assets of discontinued operations	$	79,020

Accounts payable	$	4,415
Accrued liabilities		1,542
Deferred tax liabilities		12,449
Other noncurrent liabilities		10,291
Liabilities of discontinued operations	$	28,697

- Definition

Tabular disclosure of disposal groups, which may include the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the classification and carrying value of the assets and liabilities comprising the disposal group, and the segment in which the disposal group was reported. Also may include the amount of adjustments to amounts previously reported in discontinued operations such as resolution of contingencies arising from the disposal transaction or the operations of the component prior to disposal.

+ References + Details

Note 3 - Inventories (Tables)

12 Months Ended

Dec. 31, 2014

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

(In thousands)		2014		2013


Raw materials:
Drilling fluids	$	152,076	$	153,901
Mats		1,531		790
Total raw materials		153,607		154,691

Blended drilling fluids components		40,971		34,075

Finished goods- mats		1,978		914

Total	$	196,556	$	189,680

Note 4 - Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

(In thousands)	2014			2013

Land	$	11,736		$	10,085
Buildings and improvements		98,492			86,660
Machinery and equipment		188,987			179,685
Computer hardware and software		27,431			25,360
Furnitures and fixtures		5,466			4,829
Construction in progress		40,628			12,667
		372,740			319,286
Less accumulated depreciation		(146,860	)		(137,702	)
		225,880			181,584

Composite mats (rental fleet)		90,321			60,332
Less accumulated depreciation-mats		(32,840	)		(24,906	)
		57,481			35,426

Property, plant and equipment, net	$	283,361		$	217,010

Note 5 - Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

(In thousands)	Fluids Systems			Mats and Integrated Services			Total

Balance at December 31, 2012	$	72,459		$	14,929		$	87,388
Acquisition		-			4,544			4,544
Purchase price adjustments		2,692			-			2,692
Effects of foreign currency		(560	)		-			(560	)
Balance at December 31, 2013		74,591			19,473			94,064
Effects of foreign currency		(1,907	)		(264	)		(2,171	)
Balance at December 31, 2014	$	72,684		$	19,209		$	91,893

Schedule of Intangible Assets and Goodwill [Table Text Block]

	December 31, 2014							December 31, 2013
(In thousands)	Gross Carrying Amount		Accumulated Amortization			Intangible assets, net		Gross Carrying Amount		Accumulated Amortization			Intangible assets, net

Technology related	$	5,087	$	(3,277	)	$	1,810	$	5,318	$	(3,065	)	$	2,253
Customer related		35,910		(24,403	)		11,507		38,684		(17,892	)		20,792
Employment related		1,625		(650	)		975		2,238		(934	)		1,304
Total amortizing intangible assets		42,622		(28,330	)		14,292		46,240		(21,891	)		24,349

Permits and licenses		549		-			549		622		-			622
Trademarks		825		-			825		929		-			929
Total indefinite-lived intangible assets		1,374		-			1,374		1,551		-			1,551

Total intangible assets	$	43,996	$	(28,330	)	$	15,666	$	47,791	$	(21,891	)	$	25,900

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

(In thousands)	2015		2016		2017		2018		2019		Thereafter		Total

Technology related	$	341	$	341	$	341	$	341	$	341	$	105	$	1,810
Customer related		3,970		2,651		2,025		1,026		730		1,105		11,507
Employment related		325		325		325		-		-		-		975
Total future amortization expense	$	4,636	$	3,317	$	2,691	$	1,367	$	1,071	$	1,210	$	14,292

Note 6 - Acquisitions (Tables)

12 Months Ended

Dec. 31, 2014

Business Combinations [Abstract]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

(In thousands)

Receivables, net	$	2,155
Property, plant and equipment, net		2,160
Goodwill		4,544
Other intangibles, net		3,328
Total assets acquired	$	12,187

Accounts payable	$	3,350
Short-term debt		284
Accrued liabilities		285
Deferred tax liability		1,092
Other noncurrent liabilities		400
Total liabilities assumed	$	5,411

Total cash conveyed at closing	$	6,776

Note 7 - Financing Arrangements (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Schedule of Debt [Table Text Block]

(In thousands)	2014			2013

Senior Notes	$	172,498		$	172,500
Revolving credit facility		-			-
Other		11,648			13,153
Total debt	$	184,146		$	185,653
Less: current portion		(11,648	)		(12,867	)
Long-term portion	$	172,498		$	172,786

Schedule of Maturities of Long-term Debt [Table Text Block]

2016	$	-
2017		172,498
2018		-
2019		-
Thereafter		-
Total	$	172,498

Note 8 - Fair Value of Financial Instruments and Concentrations of Credit Risk (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

(In thousands)		2014			2013

Gross trade receivables	$	299,962		$	252,168
Allowance for doubtful accounts		(5,458	)		(4,142	)
Net trade receivables		294,504			248,026

Other receivables		24,096			20,503

Total receivables, net	$	318,600		$	268,529

Allowance for Credit Losses on Financing Receivables [Table Text Block]

(In thousands)		2014		2013			2012
Balance at beginning of year	$	4,142	$	3,950		$	3,149
Provision for uncollectible accounts		1,246		309			1,614
Write-offs, net of recoveries		70		(117	)		(813	)
Balance at end of year	$	5,458	$	4,142		$	3,950

Note 9 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Continuing Operations [Member]

Note 9 - Income Taxes (Tables) [Line Items]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Year Ended December 31,
(In thousands)	2014			2013			2012

Current tax expense (benefit):
U.S. Federal	$	17,086		$	24,275		$	19,020
State		2,170			1,595			1,602
Foreign		9,925			7,085			8,682
Total current		29,181			32,955			29,304

Deferred tax expense (benefit):
U.S. Federal		12,237			(2,057	)		(1,082	)
State		(174	)		(598	)		(1,219	)
Foreign		(196	)		(1,575	)		4,343
Total deferred		11,867			(4,230	)		2,042

Total provision	$	41,048		$	28,725		$	31,346

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Year Ended December 31,
(In thousands)	2014		2013		2012

Income from continuing operations	$	41,048	$	28,725	$	31,346
Income from discontinued operations		12,475		5,072		4,030

Total provision	$	53,523	$	33,797	$	35,376

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

	Year Ended December 31,
(In thousands)	2014		2013		2012

U.S.	$	88,964	$	65,310	$	54,603
Foreign		31,093		16,037		27,196
Income from continuing operations before income taxes	$	120,057	$	81,347	$	81,799

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended December 31,
	2014			2013			2012


Income tax expense at federal statuatory rate		35.0	%		35.0	%		35.0	%
Nondeductible expenses		2.9	%		4.3	%		1.9	%
Manufacturing deduction		(1.9	%)		(2.5	%)		(2.2	%)
Different rates on earnings of foreign operations		(4.3	%)		(4.6	%)		(3.4	%)
Change in valuation allowance		2.1	%		3.0	%		(2.1	%)
Uncertain tax positions		0.6	%		(0.8	%)		1.9	%
Foreign tax withholdings		0.4	%		0.2	%		5.2	%
State tax expense, net		1.0	%		0.5	%		1.5	%
Other		(1.6	%)		0.2	%		0.5	%

Total income tax expense		34.2	%		35.3	%		38.3	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

(In thousands)	2014			2013

Deferred tax assets:
Net operating losses	$	15,097		$	16,064
Accruals not currently deductible		14,868			12,901
Unrealized foreign exchange		3,145			-
Bad debts		597			1,166
Foreign tax credits		862			1,653
Capitalized inventory costs and other		4,867			4,135
Total deferred tax assets		39,436			35,919
Valuation allowance		(15,353	)		(15,024	)
Total deferred tax assets, net of allowances		24,083			20,895

Deferred tax liabilities:
Accelerated depreciation and amortization		(40,308	)		(29,530	)
Tax on unremitted earnings		(6,680	)		(6,169	)
Other		(3,025	)		(1,607	)
Total deferred tax liabilities		(50,013	)		(37,306	)

Total net deferred tax liabilities	$	(25,930	)	$	(16,411	)

Current portion of deferred tax assets	$	11,013		$	11,272
Non current portion of deferred tax assets		1,258			119
Current portion of deferred tax liabilities		(507	)		(742	)
Non current portion of deferred tax liabilities		(37,694	)		(27,060	)
Net deferred tax liabilities	$	(25,930	)	$	(16,411	)

Summary of Income Tax Contingencies [Table Text Block]

(In thousands)	2014		2013			2012

Balance at January 1	$	2,175	$	2,753		$	1,218
Additions (reductions) for tax positions of prior years		1,604		(650	)		1,350
Additions for tax positions of current year		7		72			185
Balance at December 31	$	3,786	$	2,175		$	2,753

Note 10 - Capital Stock (Tables)

12 Months Ended

Dec. 31, 2014

Stockholders' Equity Note [Abstract]

Schedule of Common Stock Outstanding Roll Forward [Table Text Block]

(In thousands of shares)	2014		2013		2012

Outstanding, beginning of year		98,031		95,734		94,498
Shares issued upon exercise of options		540		1,386		286
Shares issued for grants of time vested restricted stock (net of cancellations)		633		911		950

Outstanding, end of year		99,204		98,031		95,734

Note 11 - Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Year Ended December 31,
(In thousands, except per share data)	2014		2013		2012

Basic EPS:
Income from continuing operations	$	79,009	$	52,622	$	50,453

Weighted average number of common shares outstanding		82,999		85,095		87,522

Basic income from continuing operations per common share	$	0.95	$	0.62	$	0.58


Diluted EPS:
Income from continuing operations	$	79,009	$	52,622	$	50,453
Assumed conversions of Senior Notes		5,091		5,005		4,771
Adjusted income from continuing operations	$	84,100	$	57,627	$	55,224

Weighted average number of common shares outstanding-basic		82,999		85,095		87,522
Add: Dilutive effect of stock options and restricted stock awards		1,733		1,767		876
Dilutive effect of Senior Notes		15,682		15,682		15,682

Diluted weighted average number of common shares outstanding		100,414		102,544		104,080

Diluted income from continuing operations per common share	$	0.84	$	0.56	$	0.53

Stock options and restricted stock excluded from calculation of diluted earnings per share because anti-dilutive for the period		788		415		2,671

Note 12 - Stock Based Compensation and Other Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2014

Employee Stock Option [Member]

Note 12 - Stock Based Compensation and Other Benefit Plans (Tables) [Line Items]

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]

	Year Ended December 31,
	2014		2013		2012

Weighted-average exercise price of the stock on the date of grant	$	11.20	$	11.43	$	5.57
Weighted-average grant date fair value on the date of grant	$	4.97	$	5.42	$	2.89

Restricted Stock Units (RSUs) [Member]

Note 12 - Stock Based Compensation and Other Benefit Plans (Tables) [Line Items]

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]

	Year Ended December 31,
	2014		2013

Estimated fair value at date of grant	$	12.55	$	13.11

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Shares			Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value

Outstanding at beginning of period		3,449,367		$	6.94
Granted		554,641			11.20
Exercised		(540,318	)		6.37
Expired or cancelled		(121,675	)		8.87
Outstanding at end of period		3,342,015		$	7.67		6.49	$	7,932,450

Vested or expected to vest at end of period		3,293,925		$	7.62		6.45	$	7,920,816
Options exercisable at end of period		2,135,599		$	6.69		5.36	$	6,361,350

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Year Ended December 31,
	2014			2013			2012

Risk-free interest rate		1.53	%		1.02	%		0.68	%
Expected life of the option in years		5.22			5.22			5.22
Expected volatility		48.6	%		53.7	%		60.3	%
Dividend yield		-			-			-

Schedule of Share-based Compensation, Stock Appreciation Rights Award Activity [Table Text Block]

	Rights

Outstanding at beginning of period		134,833
Exercised		(26,200	)
Expired or cancelled		(1,500	)
Outstanding at end of period		107,133

Exercisable at end of period		107,133

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

				Weighted-Average
				Grant Date
Nonvested Shares (Performance-Based)	Shares			Fair Value

Outstanding at beginning of period		149,532		$	13.11
Granted		110,497			12.55
Forfeited		(61,581	)		13.04
Outstanding at the end of period		198,448		$	12.82

Schedule of Share Based Payment Award Restricted Stock Units Valuation Assumptions [Table Text Block]

	Year Ended December 31,
	2014			2013

Risk-free interest rate		0.81	%		0.52	%
Average closing price	$	11.28	⁽¹⁾	$	11.33	⁽²⁾
Expected volatility		44.5	%		53.6	%
Dividend yield		-			-

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

				Weighted-Average
				Grant Date
Nonvested Shares (Time-Vesting)	Shares			Fair Value

Nonvested at January 1, 2014		1,772,854		$	9.52
Granted		754,477			11.21
Vested		(691,650	)		8.71
Forfeited		(112,782	)		9.79
Nonvested at December 31, 2014		1,722,899		$	10.58

				Weighted-Average
				Grant Date
Nonvested Share Units (Time-Vesting)	Shares			Fair Value

Nonvested at January 1, 2014		150,988		$	7.84
Granted		89,737			11.20
Vested		(73,135	)		11.77
Forfeited		(8,712	)		11.10
Nonvested at December 31, 2014		158,878		$	10.22

Note 13 - Segment and Related Information (Tables)

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Year Ended December 31,
(In thousands)	2014			2013			2012

Revenues
Fluids Systems	$	965,049		$	926,392		$	861,670
Mats and Integrated Services		153,367			115,964			122,283
Total Revenues	$	1,118,416		$	1,042,356		$	983,953

Depreciation and Amortization
Fluids Systems	$	22,934		$	26,679		$	18,419
Mats and Integrated Services		15,507			10,501			7,952
Corporate Office		2,734			2,584			2,575
Total Depreciation and Amortization	$	41,175		$	39,764		$	28,946

Operating Income (loss)
Fluids Systems	$	95,600		$	72,604		$	59,987
Mats and Integrated Services		70,526			49,394			54,251
Corporate Office		(35,530	)		(27,553	)		(21,963	)
Operating Income	$	130,596		$	94,445		$	92,275

Segment Assets
Fluids Systems	$	778,148		$	733,340		$	790,147
Mats and Integrated Services		175,318			112,619			81,252
Assets of discontinued operations		-			79,020			79,276
Corporate		66,656			43,438			43,866
Total Assets	$	1,020,122		$	968,417		$	994,541

Capital Expenditures
Fluids Systems	$	36,626		$	39,316		$	27,916
Mats and Integrated Services		64,101			26,455			8,174
Corporate		5,215			464			6,307
Total Capital Expenditures	$	105,942		$	66,235		$	42,397

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

	Year Ended December 31,
(In thousands)	2014		2013		2012

Revenue
United States	$	748,845	$	717,263	$	684,084
Canada		79,516		47,559		48,643
EMEA		177,244		141,535		121,175
Latin America and Mexico		85,244		99,587		88,157
Asia Pacific		27,567		36,412		41,894
Total Revenue	$	1,118,416	$	1,042,356	$	983,953

Long-Lived Assets
United States	$	296,799	$	250,724	$	237,751
Canada		10,044		10,862		11,830
EMEA		55,560		44,262		30,729
Latin America and Mexico		6,635		9,852		11,158
Asia Pacific		25,991		27,241		31,539
Total Long-Lived Assets	$	395,029	$	342,941	$	323,007

Note 15 - Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

(In thousands)
2015	$	8,441
2016		6,147
2017		4,887
2018		3,663
2019		2,934
Thereafter		10,499
	$	36,571

Note 16 - Supplemental Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

	Quarter Ended
(In thousands, except per share amounts)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter

Fiscal Year 2014
Revenues	$	242,824	$	272,466	$	296,964	$	306,162
Operating income		20,757		31,816		39,432		38,591
Income from continuing operations		11,742		20,329		23,492		23,446
Net income		35,011		20,329		23,492		23,446

Income per common share -basic:
Income from continuing operations		0.14		0.24		0.29		0.29
Net income		0.41		0.24		0.29		0.29

Income per common share -diluted:
Income from continuing operations		0.13		0.21		0.25		0.25
Net income		0.36		0.21		0.25		0.25


Fiscal Year 2013
Revenues	$	267,923	$	259,376	$	268,132	$	246,925
Operating income		24,861		21,596		25,645		22,343
Income from continuing operations		14,867		11,859		15,431		10,465
Net income		17,375		15,664		18,760		13,524

Income per common share -basic:
Income from continuing operations		0.18		0.14		0.18		0.12
Net income		0.21		0.19		0.22		0.16

Income per common share -diluted:
Income from continuing operations		0.16		0.13		0.16		0.11
Net income		0.18		0.17		0.20		0.14

Note 1 - Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	Dec. 31, 2014	Dec. 31, 2013
Disclosure Text Block [Abstract]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ 32.0	$ 9.5

Note 1 - Summary of Significant Accounting Policies (Details) - Estimated Useful Service Lives or Lease Term	12 Months Ended
	Dec. 31, 2014
Office Equipment [Member] \| Minimum [Member]
Years
Property, plant and equipment, useful life	3 years
Office Equipment [Member] \| Maximum [Member]
Years
Property, plant and equipment, useful life	5 years
Automobiles [Member] \| Minimum [Member]
Years
Property, plant and equipment, useful life	5 years
Automobiles [Member] \| Maximum [Member]
Years
Property, plant and equipment, useful life	7 years
Furniture and Fixtures [Member] \| Minimum [Member]
Years
Property, plant and equipment, useful life	7 years
Furniture and Fixtures [Member] \| Maximum [Member]
Years
Property, plant and equipment, useful life	10 years
Composite Mats [Member] \| Minimum [Member]
Years
Property, plant and equipment, useful life	7 years
Composite Mats [Member] \| Maximum [Member]
Years
Property, plant and equipment, useful life	12 years
Machinery and Equipment [Member] \| Minimum [Member]
Years
Property, plant and equipment, useful life	5 years
Machinery and Equipment [Member] \| Maximum [Member]
Years
Property, plant and equipment, useful life	15 years
Building [Member] \| Minimum [Member]
Years
Property, plant and equipment, useful life	20 years
Building [Member] \| Maximum [Member]
Years
Property, plant and equipment, useful life	39 years
Computer Software, Intangible Asset [Member] \| Minimum [Member]
Years
Property, plant and equipment, useful life	3 years
Computer Software, Intangible Asset [Member] \| Maximum [Member]
Years
Property, plant and equipment, useful life	10 years

Note 2 - Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Released 18 Months From Closing Date [Member] \| Environmental Services [Member]
Note 2 - Discontinued Operations (Details) [Line Items]
Escrow Deposit	$ 4,000
Released 9 Months From Closing Date [Member] \| Environmental Services [Member]
Note 2 - Discontinued Operations (Details) [Line Items]
Escrow Deposit	4,000
Environmental Services [Member]
Note 2 - Discontinued Operations (Details) [Line Items]
Proceeds from Divestiture of Businesses	100,000
Proceeds from Divestiture of Businesses, Net	89,800
Escrow Deposit	8,000
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	34,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	$ 22,100
Proceeds from Divestiture of Businesses, Net		$ 89,766	$ 13,329
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax		33,974
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax		$ 22,117

Note 2 - Discontinued Operations (Details) - Summary of Operations from Discontinued Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Summary of Operations from Discontinued Operations [Abstract]
Revenues	$ 11,744	$ 65,002	$ 54,066
Income from discontinued operations before income taxes	1,770	17,773	13,609
Income from discontinued operations, net of tax	1,152	$ 12,701	$ 9,579
Gain from disposal of discontinued operations before income taxes	33,974
Gain from disposal of discontinued operations, net of tax	$ 22,117

Note 2 - Discontinued Operations (Details) - Assets and Liabilities from Discontinued Operations $ in Thousands	Dec. 31, 2013 USD ($)
Assets and Liabilities from Discontinued Operations [Abstract]
Receivables, net	$ 11,915
Prepaid expenses and other current assets	1,188
Property, plant and equipment, net	62,333
Other assets	3,584
Assets of discontinued operations	79,020
Accounts payable	4,415
Accrued liabilities	1,542
Deferred tax liabilities	12,449
Other noncurrent liabilities	10,291
Liabilities of discontinued operations	$ 28,697

Note 3 - Inventories (Details) - Inventories - USD ($) $ in Thousands	Dec. 31, 2014	Dec. 31, 2013
Drilling fluids [Member]
Raw materials:
Raw materials	$ 152,076	$ 153,901
Mats [Member]
Raw materials:
Raw materials	1,531	790
Finished goods- mats	1,978	914
Blended Drilling Fluids Components [Member]
Raw materials:
Blended drilling fluids components	40,971	34,075
Raw materials	153,607	154,691
Total	$ 196,556	$ 189,680

Note 4 - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Manufacturing Facility [Member]
Note 4 - Property, Plant and Equipment (Details) [Line Items]
Payments to Acquire Property, Plant, and Equipment	$ 28,800
Facility in Fourchon, Louisiana [Member] \| Scenario, Plan [Member]
Note 4 - Property, Plant and Equipment (Details) [Line Items]
Payments to Acquire Property, Plant, and Equipment	30,000
Facility in Conroe, Texas [Member] \| Scenario, Plan [Member]
Note 4 - Property, Plant and Equipment (Details) [Line Items]
Payments to Acquire Property, Plant, and Equipment	20,000
Depreciation	33,200	$ 29,400	$ 25,700
Payments to Acquire Property, Plant, and Equipment	$ 106,973	$ 67,929	$ 43,955

Note 4 - Property, Plant and Equipment (Details) - Property, Plant and Equipment - USD ($) $ in Thousands	Dec. 31, 2014	Dec. 31, 2013
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 11,736	$ 10,085
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	98,492	86,660
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	188,987	179,685
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	27,431	25,360
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	5,466	4,829
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	40,628	12,667
Property, plant and equipment	372,740	319,286
Less accumulated depreciation	(146,860)	(137,702)
	225,880	181,584
Composite mats (rental fleet)	90,321	60,332
Less accumulated depreciation-mats	(32,840)	(24,906)
	57,481	35,426
Property, plant and equipment, net	$ 283,361	$ 217,010

Note 5 - Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Customer-Related Intangible Assets [Member]
Note 5 - Goodwill and Other Intangible Assets (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life	9 years
Employment Related Intangible Assets [Member]
Note 5 - Goodwill and Other Intangible Assets (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Technology-Based Intangible Assets [Member]
Note 5 - Goodwill and Other Intangible Assets (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Amortization of Intangible Assets	$ 8.0	$ 10.4	$ 3.3

Note 5 - Goodwill and Other Intangible Assets (Details) - Changes in the Carrying Amount of Goodwill - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Fluids Systems [Member]
Goodwill [Line Items]
Balance	$ 72,684	$ 74,591
Purchase price adjustments		2,692
Effects of foreign currency	(1,907)	(560)
Mats and Integrated Services [Member]
Goodwill [Line Items]
Balance	19,209	19,473
Acquisition		4,544
Effects of foreign currency	(264)
Balance	91,893	94,064
Acquisition		4,544
Purchase price adjustments		2,692
Effects of foreign currency	$ (2,171)	$ (560)

Note 5 - Goodwill and Other Intangible Assets (Details) - Other Intangible Assets - USD ($) $ in Thousands	Dec. 31, 2014	Dec. 31, 2013
Permits and Licenses [Member]
Note 5 - Goodwill and Other Intangible Assets (Details) - Other Intangible Assets [Line Items]
Indefinite-lived intangible assets, gross carrying amount	$ 549	$ 622
Intangible assets, net	549	622
Trademarks [Member]
Note 5 - Goodwill and Other Intangible Assets (Details) - Other Intangible Assets [Line Items]
Indefinite-lived intangible assets, gross carrying amount	825	929
Intangible assets, net	825	929
Technology-Based Intangible Assets [Member]
Note 5 - Goodwill and Other Intangible Assets (Details) - Other Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	5,087	5,318
Finite-lived intangible assets, accumulated amortization	(3,277)	(3,065)
Intangible assets, net	1,810	2,253
Total intangible assets	(3,277)	(3,065)
Customer-Related Intangible Assets [Member]
Note 5 - Goodwill and Other Intangible Assets (Details) - Other Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	35,910	38,684
Finite-lived intangible assets, accumulated amortization	(24,403)	(17,892)
Intangible assets, net	11,507	20,792
Total intangible assets	(24,403)	(17,892)
Employment Related Intangible Assets [Member]
Note 5 - Goodwill and Other Intangible Assets (Details) - Other Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	1,625	2,238
Finite-lived intangible assets, accumulated amortization	(650)	(934)
Intangible assets, net	975	1,304
Total intangible assets	(650)	(934)
Finite-lived intangible assets, gross carrying amount	42,622	46,240
Finite-lived intangible assets, accumulated amortization	(28,330)	(21,891)
Intangible assets, net	14,292	24,349
Indefinite-lived intangible assets, gross carrying amount	1,374	1,551
Intangible assets, net	1,374	1,551
Total intangible assets	43,996	47,791
Total intangible assets	(28,330)	(21,891)
Total intangible assets	$ 15,666	$ 25,900

Note 5 - Goodwill and Other Intangible Assets (Details) - Estimated Future Amortization Expense - USD ($) $ in Thousands	Dec. 31, 2014	Dec. 31, 2013
Technology-Based Intangible Assets [Member]
Note 5 - Goodwill and Other Intangible Assets (Details) - Estimated Future Amortization Expense [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 341
Finite-Lived Intangible Assets, Amortization Expense, Year Two	341
Finite-Lived Intangible Assets, Amortization Expense, Year Three	341
Finite-Lived Intangible Assets, Amortization Expense, Year Four	341
Finite-Lived Intangible Assets, Amortization Expense, Year Five	341
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	105
Finite-Lived Intangible Assets, Net	1,810	$ 2,253
Customer-Related Intangible Assets [Member]
Note 5 - Goodwill and Other Intangible Assets (Details) - Estimated Future Amortization Expense [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	3,970
Finite-Lived Intangible Assets, Amortization Expense, Year Two	2,651
Finite-Lived Intangible Assets, Amortization Expense, Year Three	2,025
Finite-Lived Intangible Assets, Amortization Expense, Year Four	1,026
Finite-Lived Intangible Assets, Amortization Expense, Year Five	730
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	1,105
Finite-Lived Intangible Assets, Net	11,507	20,792
Employment Related Intangible Assets [Member]
Note 5 - Goodwill and Other Intangible Assets (Details) - Estimated Future Amortization Expense [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	325
Finite-Lived Intangible Assets, Amortization Expense, Year Two	325
Finite-Lived Intangible Assets, Amortization Expense, Year Three	325
Finite-Lived Intangible Assets, Net	975	1,304
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	4,636
Finite-Lived Intangible Assets, Amortization Expense, Year Two	3,317
Finite-Lived Intangible Assets, Amortization Expense, Year Three	2,691
Finite-Lived Intangible Assets, Amortization Expense, Year Four	1,367
Finite-Lived Intangible Assets, Amortization Expense, Year Five	1,071
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	1,210
Finite-Lived Intangible Assets, Net	$ 14,292	$ 24,349

Note 6 - Acquisitions (Details) - USD ($) $ in Thousands	12 Months Ended
Note 6 - Acquisitions (Details) - USD ($) $ in Thousands	Dec. 31, 2013	Dec. 31, 2012
Terrafirma Roadways [Member] \| Maximum [Member]
Note 6 - Acquisitions (Details) [Line Items]
Business Acquisition Contingent Consideration Potential Cash Payment1	$ 1,600
Terrafirma Roadways [Member]
Note 6 - Acquisitions (Details) [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$ 6,800
Business Acquisition, Contingent Consideration Potential Cash Payment, Payment Period	18 months
Payments to Acquire Businesses, Net of Cash Acquired	$ 6,776	$ 53,075

Note 6 - Acquisitions (Details) - Assets Acquired and Liabilities Assumed - USD ($) $ in Thousands	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Terrafirma Roadways [Member]
Note 6 - Acquisitions (Details) - Assets Acquired and Liabilities Assumed [Line Items]
Receivables, net		$ 2,155
Property, plant and equipment, net		2,160
Goodwill		4,544
Other intangibles, net		3,328
Total assets acquired		12,187
Accounts payable		3,350
Short-term debt		284
Accrued liabilities		285
Deferred tax liability		1,092
Other noncurrent liabilities		400
Total liabilities assumed		5,411
Total cash conveyed at closing		6,776
Goodwill	$ 91,893	$ 94,064	$ 87,388

Note 7 - Financing Arrangements (Details) - USD ($)	12 Months Ended
Note 7 - Financing Arrangements (Details) - USD ($)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Credit Agreement [Member] \| Revolving Credit Facility [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 125,000,000
Credit Agreement [Member] \| Letter of Credit [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	102,500,000
Credit Agreement [Member] \| Foreign Operations [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Long-term Line of Credit	11,600,000
Letters of Credit Outstanding, Amount	$ 100,000
Credit Agreement [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.75%
Credit Agreement [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Maximum [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	3.00%
Credit Agreement [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.00%
Credit Agreement [Member] \| Federal Funds Rate [Member] \| Minimum [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Credit Agreement [Member] \| Federal Funds Rate [Member] \| Maximum [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Credit Agreement [Member] \| Eurodollar [Member] \| Minimum [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.75%
Credit Agreement [Member] \| Eurodollar [Member] \| Maximum [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.00%
Credit Agreement [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.375%
Long-term Line of Credit	$ 0
Letters of Credit Outstanding, Amount	22,500,000
Senior Notes [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Debt Instrument, Face Amount	$ 172,500,000
Debt Instrument, Interest Rate, Stated Percentage	4.00%
Debt Conversion Converted Instrument Shares Issued For Basis Principal (in Shares)	90.8893
Debt Conversion Principal Amount Of Senior Notes As Basis For Conversion Rate	$ 1,000
Debt Instrument, Convertible, Conversion Price (in Dollars per share)	$ 11.00
Revolving Credit Facility [Member] \| Minimum [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 125,000,000
Revolving Credit Facility [Member] \| Maximum [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	200,000,000
Revolving Credit Facility [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Additional Borrowing Capacity on Credit Facility	$ 75,000,000
Foreign Operations [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Short-term Debt, Weighted Average Interest Rate	15.10%	14.10%
Short-term Debt	$ 11,400,000	$ 13,200,000
Short-term Debt	11,648,000	12,867,000
Interest Expense	10,400,000	$ 11,300,000	$ 9,700,000
Interest Costs Capitalized	$ 800,000

Note 7 - Financing Arrangements (Details) - Financing Arrangements - USD ($) $ in Thousands	Dec. 31, 2014	Dec. 31, 2013
Senior Notes [Member]
Note 7 - Financing Arrangements (Details) - Financing Arrangements [Line Items]
Long-term debt	$ 172,498	$ 172,500
Other Long-Term Deb [tMember]
Note 7 - Financing Arrangements (Details) - Financing Arrangements [Line Items]
Long-term debt	11,648	13,153
Total debt	184,146	185,653
Less: current portion	(11,648)	(12,867)
Long-term portion	$ 172,498	$ 172,786

Note 7 - Financing Arrangements (Details) - Maturities of Long-term Debt - USD ($) $ in Thousands	Dec. 31, 2014	Dec. 31, 2013
Maturities of Long-term Debt [Abstract]
2017	$ 172,498
Total	$ 172,498	$ 172,786

Note 8 - Fair Value of Financial Instruments and Concentrations of Credit Risk (Details) $ in Millions	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012	Mar. 31, 2014 USD ($)
Twenty Largest Customers [Member] \| Sales Revenue, Net [Member] \| Customer Concentration Risk [Member]
Note 8 - Fair Value of Financial Instruments and Concentrations of Credit Risk (Details) [Line Items]
Concentration Risk, Percentage	40.00%	50.00%	40.00%
Senior Notes [Member]
Note 8 - Fair Value of Financial Instruments and Concentrations of Credit Risk (Details) [Line Items]
Fair Value, Estimate Not Practicable, Senior Debt Obligations	$ 192.3	$ 231.2
Environmental Services [Member] \| Receivables, Net [Member]
Note 8 - Fair Value of Financial Instruments and Concentrations of Credit Risk (Details) [Line Items]
Escrow Deposit	8.0
Environmental Services [Member]
Note 8 - Fair Value of Financial Instruments and Concentrations of Credit Risk (Details) [Line Items]
Escrow Deposit				$ 8.0
Receivables, Net [Member]
Note 8 - Fair Value of Financial Instruments and Concentrations of Credit Risk (Details) [Line Items]
Nontrade Receivables	$ 14.5	$ 15.6
Number of Major Customers	20

Note 8 - Fair Value of Financial Instruments and Concentrations of Credit Risk (Details) - Accounts Receivable - USD ($) $ in Thousands	Dec. 31, 2014	Dec. 31, 2013
Accounts Receivable [Abstract]
Gross trade receivables	$ 299,962	$ 252,168
Allowance for doubtful accounts	(5,458)	(4,142)
Net trade receivables	294,504	248,026
Other receivables	24,096	20,503
Total receivables, net	$ 318,600	$ 268,529

Note 8 - Fair Value of Financial Instruments and Concentrations of Credit Risk (Details) - Allowances for Losses on Accounts Receivable - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for uncollectible accounts	$ 1,246	$ 309	$ 1,614
Balance at beginning of year	4,142	3,950	3,149
Provision for uncollectible accounts	1,252	416	1,709
Write-offs, net of recoveries	70	(117)	(813)
Balance at end of year	$ 5,458	$ 4,142	$ 3,950

Note 9 - Income Taxes (Details) - USD ($)	12 Months Ended
Note 9 - Income Taxes (Details) - USD ($)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Provision for Income Taxes [Member]
Note 9 - Income Taxes (Details) [Line Items]
Tax Assessment Charge and Increase in Tax Rates			$ 3,900,000
Expiring Next Twelve Months [Member]
Note 9 - Income Taxes (Details) [Line Items]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 2,200,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	186,400,000
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	18,600,000
Operating Loss Carryforwards, Valuation Allowance	15,400,000	$ 15,000,000
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries	133,300,000	112,600,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	3,300,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	200,000	0	$ 400,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 400,000	$ 200,000

Note 9 - Income Taxes (Details) - Provision for Income Taxes - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current tax expense (benefit):
U.S. Federal	$ 17,086	$ 24,275	$ 19,020
State	2,170	1,595	1,602
Foreign	9,925	7,085	8,682
Total current	29,181	32,955	29,304
Deferred tax expense (benefit):
U.S. Federal	12,237	(2,057)	(1,082)
State	(174)	(598)	(1,219)
Foreign	(196)	(1,575)	4,343
Total deferred	11,867	(4,230)	2,042
Total provision	$ 41,048	$ 28,725	$ 31,346

Note 9 - Income Taxes (Details) - Total Provision Allocated in Components - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Continuing Operations [Member]
Note 9 - Income Taxes (Details) - Total Provision Allocated in Components [Line Items]
Income from continuing operations	$ 41,048	$ 28,725	$ 31,346
Discontinued Operations [Member]
Note 9 - Income Taxes (Details) - Total Provision Allocated in Components [Line Items]
Income from discontinued operations	12,475	5,072	4,030
Income from continuing operations	41,048	28,725	31,346
Total provision	$ 53,523	$ 33,797	$ 35,376

Note 9 - Income Taxes (Details) - Income from Operations Before Income Taxes - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income from Operations Before Income Taxes [Abstract]
U.S.	$ 88,964	$ 65,310	$ 54,603
Foreign	31,093	16,037	27,196
Income from continuing operations before income taxes	$ 120,057	$ 81,347	$ 81,799

Note 9 - Income Taxes (Details) - Effective Income Tax Reconciliation	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Effective Income Tax Reconciliation [Abstract]
Income tax expense at federal statuatory rate	35.00%	35.00%	35.00%
Nondeductible expenses	2.90%	4.30%	1.90%
Manufacturing deduction	(1.90%)	(2.50%)	(2.20%)
Different rates on earnings of foreign operations	(4.30%)	(4.60%)	(3.40%)
Change in valuation allowance	2.10%	3.00%	(2.10%)
Uncertain tax positions	0.60%	(0.80%)	1.90%
Foreign tax withholdings	0.40%	0.20%	5.20%
State tax expense, net	1.00%	0.50%	1.50%
Other	(1.60%)	0.20%	0.50%
Total income tax expense	34.20%	35.30%	38.30%

Note 9 - Income Taxes (Details) - Deferred Tax Assets and Liabilities - USD ($) $ in Thousands	Dec. 31, 2014	Dec. 31, 2013
Deferred tax assets:
Net operating losses	$ 15,097	$ 16,064
Accruals not currently deductible	14,868	12,901
Unrealized foreign exchange	3,145
Bad debts	597	1,166
Foreign tax credits	862	1,653
Capitalized inventory costs and other	4,867	4,135
Total deferred tax assets	39,436	35,919
Valuation allowance	(15,353)	(15,024)
Total deferred tax assets, net of allowances	24,083	20,895
Deferred tax liabilities:
Accelerated depreciation and amortization	(40,308)	(29,530)
Tax on unremitted earnings	(6,680)	(6,169)
Other	(3,025)	(1,607)
Total deferred tax liabilities	(50,013)	(37,306)
Total net deferred tax liabilities	(25,930)	(16,411)
Current portion of deferred tax assets	11,013	11,272
Non current portion of deferred tax assets	1,258	119
Current portion of deferred tax liabilities	(507)	(742)
Non current portion of deferred tax liabilities	(37,694)	(27,060)
Net deferred tax liabilities	$ (25,930)	$ (16,411)

Note 9 - Income Taxes (Details) - Uncertain Tax Positions Reconciliation - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Uncertain Tax Positions Reconciliation [Abstract]
Balance at January 1	$ 2,175	$ 2,753	$ 1,218
Additions (reductions) for tax positions of prior years	1,604	(650)	1,350
Additions for tax positions of current year	7	72	185
Balance at December 31	$ 3,786	$ 2,175	$ 2,753

Note 10 - Capital Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Apr. 30, 2013	Feb. 28, 2012
Restricted Stock [Member] \| 2014 Director Plan [Member]
Note 10 - Capital Stock (Details) [Line Items]
Stock Issued During Period, Shares, Treasury Stock Reissued	81,849
Restricted Stock [Member]
Note 10 - Capital Stock (Details) [Line Items]
Treasury Stock, Value, Acquired, Cost Method (in Dollars)	$ 2,500	$ 2,600	$ 600
Share Repurchase Program [Member]
Note 10 - Capital Stock (Details) [Line Items]
Treasury Stock, Shares, Acquired	4,317,278	562,341	7,241,693
Treasury Stock, Value, Acquired, Cost Method (in Dollars)			$ 50,000
Stock Repurchase Program, Authorized Amount (in Dollars)	$ 100,000			$ 50,000	$ 50,000
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)	$ 11.72	$ 11.94	$ 6.92
Stock Repurchase Program, Remaining Authorized Repurchase Amount (in Dollars)	$ 42,700
Employee Stock Purchase Plan [Member]
Note 10 - Capital Stock (Details) [Line Items]
Stock Issued During Period, Shares, Treasury Stock Reissued	73,801	67,622	34,724
Preferred Stock, Shares Authorized	1,000,000
Preferred Stock, Par or Stated Value Per Share (in Dollars per share)	$ 0.01
Preferred Stock, Shares Outstanding	0	0	0
Treasury Stock, Shares, Acquired	215,760	222,175	104,995
Treasury Stock, Value, Acquired, Cost Method (in Dollars)	$ (50,596)	$ (6,713)	$ (50,145)
Stock Issued During Period, Shares, Treasury Stock Reissued	155,650

Note 10 - Capital Stock (Details) - Changes in Outstanding Common Stock - shares shares in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Changes in Outstanding Common Stock [Abstract]
Outstanding, beginning of year	98,031	95,734	94,498
Shares issued upon exercise of options	540	1,386	286
Shares issued for grants of time vested restricted stock (net of cancellations)	633	911	950
Outstanding, end of year	99,204	98,031	95,734

Note 11 - Earnings Per Share (Details) - Earnings Per Share - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Basic EPS:
Income from continuing operations (in Dollars)	$ 79,009	$ 52,622	$ 50,453
Assumed conversions of Senior Notes (in Dollars)	5,091	5,005	4,771
Adjusted income from continuing operations (in Dollars)	$ 84,100	$ 57,627	$ 55,224
Weighted average number of common shares outstanding - basic	82,999	85,095	87,522
Add: Dilutive effect of stock options and restricted stock awards	1,733	1,767	876
Dilutive effect of Senior Notes	15,682	15,682	15,682
Diluted weighted average number of common shares outstanding	100,414	102,544	104,080
Diluted income from continuing operations per common share (in Dollars per share)	$ 0.84	$ 0.56	$ 0.53
Stock options and restricted stock excluded from calculation of diluted earnings per share because anti-dilutive for the period	788	415	2,671
Basic income from continuing operations per common share (in Dollars per share)	$ 0.95	$ 0.62	$ 0.58

Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - USD ($)	1 Months Ended	12 Months Ended
	May 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock [Member] \| Non-Employee Directors [Member] \| 2014 Director Plan [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)		81,849
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)		$ 11.24
Restricted Stock [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)		754,477
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)		$ 11.21
Employee Stock Option [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years
Stock Appreciation Rights (SARs) [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)		0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)		$ 2.62
Per Share Value Used for Calculating Cash Settlement of Stock Appreciation Rights (in Dollars per share)		$ 7.89
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent		$ 300,000
Stock Options and Cash Settled Stock Appreciation Rights [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Allocated Share-based Compensation Expense		$ 2,600,000	$ 3,300,000	$ 2,300,000
Performance Based Restricted Stock Units and Cash Settled Performance Based Restricted Stock Units [Member] \| Minimum [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Target Percentage		0.00%	0.00%
Performance Based Restricted Stock Units and Cash Settled Performance Based Restricted Stock Units [Member] \| Maximum [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Target Percentage		150.00%	150.00%
Performance Based Restricted Stock Units and Cash Settled Performance Based Restricted Stock Units [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)		110,497	149,532	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)		$ 12.55	$ 13.11
Allocated Share-based Compensation Expense		$ 500,000	$ 400,000	$ 0
Restricted Stock Units and Restricted Stock Awards [Member] \| Minimum [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
Restricted Stock Units and Restricted Stock Awards [Member] \| Maximum [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		4 years
Restricted Stock Units and Restricted Stock Awards [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Allocated Share-based Compensation Expense		$ 8,600,000	6,700,000	4,600,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense		2,800,000	3,000,000	900,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 13,300,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		2 years 36 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 9,000,000	$ 9,500,000	2,500,000
Participants Contributions Up to Three Percent of Compensation [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		3.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match		100.00%
Participants Contributions From 3 Percent to 6 Percent of Compensation [Member] \| Minimum [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		3.00%
Participants Contributions From 3 Percent to 6 Percent of Compensation [Member] \| Maximum [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		6.00%
Participants Contributions From 3 Percent to 6 Percent of Compensation [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match		50.00%
Non-Employee Directors [Member] \| 2014 Director Plan [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Pre-Determined Dollar Amount for Determining the Number of Restricted Shares Granted	$ 150,000
Board of Directors Chairman [Member] \| 2014 Director Plan [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Pre-Determined Dollar Amount for Determining the Number of Restricted Shares Granted	$ 170,000
2014 Director Plan [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)		1,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)		918,151
Amended and Restated Non-Employee Directors’ Restricted Stock Plan [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)		0
Two Thousand Six Equity Incentive Plan [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)			12,250,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)		2,247,611
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)		554,641
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate		0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		$ 3,200,000	$ 6,100,000	1,000,000
Proceeds from Stock Options Exercised		3,400,000	8,300,000	1,100,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense		$ 1,000,000	1,900,000	300,000
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent		50.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount		$ 3,600,000	$ 3,400,000	$ 3,300,000

Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Stock Options Activity - USD ($)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Options Activity [Abstract]
Outstanding at beginning of period	3,449,367
Outstanding at beginning of period	$ 6.94
Outstanding at end of period	3,342,015	3,449,367
Outstanding at end of period	$ 7.67	$ 6.94
Outstanding at end of period	6 years 178 days
Outstanding at end of period	$ 7,932,450
Vested or expected to vest at end of period	3,293,925
Vested or expected to vest at end of period	$ 7.62
Vested or expected to vest at end of period	6 years 164 days
Vested or expected to vest at end of period	$ 7,920,816
Options exercisable at end of period	2,135,599
Options exercisable at end of period	$ 6.69
Options exercisable at end of period	5 years 131 days
Options exercisable at end of period	$ 6,361,350
Granted	554,641
Granted	$ 11.20	$ 11.43	$ 5.57
Exercised	(540,318)
Exercised	$ 6.37
Expired or cancelled	(121,675)
Expired or cancelled	$ 8.87

Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Weighted Average Assumptions, Options - Employee Stock Option [Member]	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Weighted Average Assumptions, Options [Line Items]
Risk-free interest rate	1.53%	1.02%	0.68%
Expected life of the option in years	5 years 80 days	5 years 80 days	5 years 80 days
Expected volatility	48.60%	53.70%	60.30%

Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Weighted-average Exercise Price and Weighted-Average Grant Date Fair Value, Options - $ / shares	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Weighted-average Exercise Price and Weighted-Average Grant Date Fair Value, Options [Abstract]
Weighted-average exercise price of the stock on the date of grant	$ 11.20	$ 11.43	$ 5.57
Weighted-average grant date fair value on the date of grant	$ 4.97	$ 5.42	$ 2.89

Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Stock Appreciation Rights Activity - Stock Appreciation Rights (SARs) [Member]	12 Months Ended
	Dec. 31, 2014 shares
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Stock Appreciation Rights Activity [Line Items]
Balance outstanding	134,833
Exercisable at end of period	107,133
Exercised	(26,200)
Expired or cancelled	(1,500)
Balance outstanding	107,133

Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Restricted Stock Activity - Performance Based Restricted Stock Units and Cash Settled Performance Based Restricted Stock Units [Member] - $ / shares	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Restricted Stock Activity [Line Items]
Balance	149,532
Balance	$ 13.11
Granted	110,497	149,532	0
Granted	$ 12.55	$ 13.11
Forfeited	(61,581)
Forfeited	$ 13.04
Balance	198,448	149,532
Balance	$ 12.82	$ 13.11

Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Weighted-average Exercise Price and Weighted-Average Grant Date Fair Value, Restricted Stock Units - $ / shares	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Performance Based Restricted Stock Units and Cash Settled Performance Based Restricted Stock Units [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Weighted-average Exercise Price and Weighted-Average Grant Date Fair Value, Restricted Stock Units [Line Items]
Estimated fair value at date of grant	$ 12.55	$ 13.11

Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Weighted Average Assumptions, Restricted Stock Units - Performance Based Restricted Stock Units and Cash Settled Performance Based Restricted Stock Units [Member] - USD ($)

12 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Weighted Average Assumptions, Restricted Stock Units [Line Items]

Risk-free interest rate

0.81%

0.52%

Average closing price (in Dollars)

$ 11.28

^[1]

$ 11.33

^[2]

Expected volatility

44.50%

53.60%

[1]	Average closing price of our shares over the 30-calendar days ending May 16, 2014.
[2]	Average closing price of our shares over the 30-calendar days ending June 3, 2013.

Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Time-vested Restricted Stock	12 Months Ended
	Dec. 31, 2014 $ / shares shares
Restricted Stock [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Time-vested Restricted Stock [Line Items]
Balance \| shares	1,772,854
Balance \| $ / shares	$ 9.52
Granted \| shares	754,477
Granted \| $ / shares	$ 11.21
Vested \| shares	(691,650)
Vested \| $ / shares	$ 8.71
Forfeited \| shares	(112,782)
Forfeited \| $ / shares	$ 9.79
Balance \| shares	1,722,899
Balance \| $ / shares	$ 10.58
Restricted Stock Units (RSUs) [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Time-vested Restricted Stock [Line Items]
Balance \| shares	150,988
Balance \| $ / shares	$ 7.84
Granted \| shares	89,737
Granted \| $ / shares	$ 11.20
Vested \| shares	(73,135)
Vested \| $ / shares	$ 11.77
Forfeited \| shares	(8,712)
Forfeited \| $ / shares	$ 11.10
Balance \| shares	158,878
Balance \| $ / shares	$ 10.22

Note 13 - Segment and Related Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)
Discontinued Operations [Member]
Note 13 - Segment and Related Information (Details) [Line Items]
Payments to Acquire Property, Plant, and Equipment	$ 1,000	$ 1,700	$ 1,600
Number of Reportable Segments	2
Disposal Group, Including Discontinued Operation, Depreciation and Amortization	$ 900	4,400	3,900
Payments to Acquire Property, Plant, and Equipment	$ 106,973	$ 67,929	$ 43,955

Note 13 - Segment and Related Information (Details) - Financial Information by Segment - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fluids Systems & Engineering [Member] \| Continuing Operations [Member]
Segment Assets
Depreciation and Amortization	$ 22,934	$ 26,679	$ 18,419
Capital Expenditures	36,626	39,316	27,916
Fluids Systems & Engineering [Member]
Revenues
Revenues	965,049	926,392	861,670
Operating Income (loss)
Operating Income	95,600	72,604	59,987
Segment Assets
Segment Assets	778,148	733,340	790,147
Mats and Integrated Services [Member] \| Continuing Operations [Member]
Segment Assets
Depreciation and Amortization	15,507	10,501	7,952
Capital Expenditures	64,101	26,455	8,174
Mats and Integrated Services [Member]
Revenues
Revenues	153,367	115,964	122,283
Operating Income (loss)
Operating Income	70,526	49,394	54,251
Segment Assets
Segment Assets	175,318	112,619	81,252
Corporate Segment [Member] \| Continuing Operations [Member]
Segment Assets
Depreciation and Amortization	2,734	2,584	2,575
Capital Expenditures	5,215	464	6,307
Corporate Segment [Member]
Operating Income (loss)
Operating Income	(35,530)	(27,553)	(21,963)
Segment Assets
Segment Assets	66,656	43,438	43,866
Continuing Operations [Member]
Segment Assets
Depreciation and Amortization	41,175	39,764	28,946
Capital Expenditures	105,942	66,235	42,397
Discontinued Operations [Member]
Segment Assets
Assets of discontinued operations		79,020	79,276
Revenues	1,118,416	1,042,356	983,953
Operating Income	130,596	94,445	92,275
Segment Assets	1,020,122	968,417	994,541
Assets of discontinued operations		79,020
Depreciation and Amortization	$ 42,030	$ 44,198	$ 32,821

Note 13 - Segment and Related Information (Details) - Financial Information by Geographic Location - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
UNITED STATES
Revenue
Revenue	$ 748,845	$ 717,263	$ 684,084
Long-Lived Assets
Long-Lived Assets	296,799	250,724	237,751
CANADA
Revenue
Revenue	79,516	47,559	48,643
Long-Lived Assets
Long-Lived Assets	10,044	10,862	11,830
EMEA [Member]
Revenue
Revenue	177,244	141,535	121,175
Long-Lived Assets
Long-Lived Assets	55,560	44,262	30,729
Latin America and Mexico [Member]
Revenue
Revenue	85,244	99,587	88,157
Long-Lived Assets
Long-Lived Assets	6,635	9,852	11,158
Asia Pacific [Member]
Revenue
Revenue	27,567	36,412	41,894
Long-Lived Assets
Long-Lived Assets	25,991	27,241	31,539
Revenue	1,118,416	1,042,356	983,953
Long-Lived Assets	$ 395,029	$ 342,941	$ 323,007

Note 14 - Supplemental Cash Flow and Other Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accrued Liabilities, Current [Member]
Note 14 - Supplemental Cash Flow and Other Information (Details) [Line Items]
Employee-related Liabilities, Current	$ 25,900	$ 17,400
Capital Expenditures Incurred but Not yet Paid	1,200	1,500	$ 1,000
Accrued Liabilities, Current	$ 53,342	$ 46,341

Note 15 - Commitments and Contingencies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Letters of Credit in Favor of Insurance Company [Member]
Note 15 - Commitments and Contingencies (Details) [Line Items]
Other Commitment	$ 3,500,000	$ 4,000,000
Health Claims[Member]
Note 15 - Commitments and Contingencies (Details) [Line Items]
Threshold For Claims to BeInsured By Third Party Insurers	225,000
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years	$ 1,800,000	1,200,000
Loss Contingency Expected Estimated Claims Repayment Period	6 months
Workers Compensation Auto and General Liability Claims [Member]
Note 15 - Commitments and Contingencies (Details) [Line Items]
Threshold For Claims to BeInsured By Third Party Insurers	$ 750,000
Accrued Liabilities for Unsecured Portion of Claims	$ 2,400,000	2,500,000
Minimum [Member]
Note 15 - Commitments and Contingencies (Details) [Line Items]
OperatingLeaseTerm	1 year
Maximum [Member]
Note 15 - Commitments and Contingencies (Details) [Line Items]
OperatingLeaseTerm	11 years
Environmental Services [Member]
Note 15 - Commitments and Contingencies (Details) [Line Items]
Guarantee Obligations Due to Closure of Bonds		9,300,000
Asset Retirement Obligation		2,900,000
Operating Leases, Rent Expense	$ 25,500,000	24,500,000	$ 21,300,000
Guarantee Obligations Due to Closure of Bonds	400,000	9,900,000
Asset Retirement Obligation	$ 600,000	$ 3,300,000

Note 15 - Commitments and Contingencies (Details) - Future Minimum Payments Under Non-cancelable Operating Leases $ in Thousands	Dec. 31, 2014 USD ($)
Future Minimum Payments Under Non-cancelable Operating Leases [Abstract]
2015	$ 8,441
2016	6,147
2017	4,887
2018	3,663
2019	2,934
Thereafter	10,499
	$ 36,571

Note 16 - Supplemental Selected Quarterly Financial Data (Unaudited) (Details) - Supplemental Selected Quarterly Financial Data - USD ($)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
First Quarter [Member]
Fiscal Year 2014
Revenues	$ 242,824,000	$ 267,923,000
Operating income	20,757,000	24,861,000
Income from continuing operations - diluted	11,742,000	160
Net income	$ 35,011,000	$ 17,375,000
Income per common share -basic:
Income from continuing operations - basic	$ 0.14	$ 0.18
Net income - basic	0.41	0.21
Income per common share -diluted:
Income from continuing operations	0.13	14,867
Net income - diluted	$ 0.36	$ 0.18
Second Quarter [Member]
Fiscal Year 2014
Revenues	$ 272,466,000	$ 259,376,000
Operating income	31,816,000	21,596,000
Income from continuing operations - diluted	20,329,000	130
Net income	$ 20,329,000	$ 15,664,000
Income per common share -basic:
Income from continuing operations - basic	$ 0.24	$ 0.14
Net income - basic	0.24	0.19
Income per common share -diluted:
Income from continuing operations	0.21	11,859
Net income - diluted	$ 0.21	$ 0.17
Third Quarter [Member]
Fiscal Year 2014
Revenues	$ 296,964,000	$ 268,132,000
Operating income	39,432,000	25,645,000
Income from continuing operations - diluted	23,492,000	160
Net income	$ 23,492,000	$ 18,760,000
Income per common share -basic:
Income from continuing operations - basic	$ 0.29	$ 0.18
Net income - basic	0.29	0.22
Income per common share -diluted:
Income from continuing operations	0.25	15,431
Net income - diluted	$ 0.25	$ 0.20
Fourth Quarter [Member]
Fiscal Year 2014
Revenues	$ 306,162,000	$ 246,925,000
Operating income	38,591,000	22,343,000
Income from continuing operations - diluted	23,446,000	110
Net income	$ 23,446,000	$ 13,524,000
Income per common share -basic:
Income from continuing operations - basic	$ 0.29	$ 0.12
Net income - basic	0.29	0.16
Income per common share -diluted:
Income from continuing operations	0.25	10,465
Net income - diluted	$ 0.25	$ 0.14
Revenues	$ 1,118,416,000	$ 1,042,356,000	$ 983,953,000
Operating income	130,596,000	94,445,000	92,275,000
Income from continuing operations - diluted	79,009,000	52,622,000	50,453,000
Net income	$ 102,278,000	$ 65,323,000	$ 60,032,000
Income from continuing operations - basic	$ 0.95	$ 0.62	$ 0.58
Net income - basic	1.23	0.77	0.69
Income from continuing operations	0.84	0.56	0.53
Net income - diluted	$ 1.07	$ 0.69	$ 0.62

Label	Element	Value
Mats And Integrated Services [Member]
Goodwill	us-gaap_Goodwill	$ 14,929,000
Fluids Systems [Member]
Goodwill	us-gaap_Goodwill	$ 72,459,000