Core Laboratories (CLB) 10-Q 29 Apr 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 28, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	CORE LABORATORIES N V
Entity Central Index Key	1000229
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		42,809,851

Consolidated_Balance_Sheets_St

Consolidated Balance Sheets Statement (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
CURRENT ASSETS:
Cash and cash equivalents	$19,137	$23,350
Accounts receivable, net of allowance for doubtful accounts of $4,228 and $3,397 at 2015 and 2014, respectively	158,861	197,163
Inventories	49,169	43,371
Prepaid expenses	14,289	14,246
Income taxes receivable	2,498	10,980
Other current assets	12,774	12,710
TOTAL CURRENT ASSETS	256,728	301,820
PROPERTY, PLANT AND EQUIPMENT, net	147,961	149,014
INTANGIBLES, net	10,607	10,642
GOODWILL	164,464	164,464
DEFERRED TAX ASSETS, net	3,941	3,876
OTHER ASSETS	46,307	45,837
TOTAL ASSETS	630,008	675,653
CURRENT LIABILITIES:
Accounts payable	50,998	47,084
Accrued payroll and related costs	38,128	34,617
Taxes other than payroll and income	9,202	11,199
Unearned revenue	14,777	11,009
Income taxes payable	2,296	8,333
Other accrued expenses	16,125	19,624
TOTAL CURRENT LIABILITIES	131,526	131,866
LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS	373,000	356,000
DEFERRED COMPENSATION	43,530	42,705
DEFERRED TAX LIABILITIES, net	6,508	7,210
OTHER LONG-TERM LIABILITIES	42,899	43,879
COMMITMENTS AND CONTINGENCIES (Note 6)
Preference shares, EUR 0.02 par value; 6,000,000 shares authorized, none issued or outstanding	0	0
Common shares, EUR 0.02 par value; 200,000,000 shares authorized, 45,600,002 issued and 42,976,340 outstanding at 2015 and 45,600,002 issued and 43,636,984 outstanding at 2014	1,174	1,174
Additional paid-in capital	857	0
Retained earnings	423,365	415,906
Accumulated other comprehensive income (loss)	-12,686	-11,894
Treasury shares (at cost), 2,623,662 at 2015 and 1,963,018 at 2014	-386,228	-317,613
Total Core Laboratories N.V. shareholders' equity	26,482	87,573
Non-controlling interest	6,063	6,420
TOTAL EQUITY	32,545	93,993
TOTAL LIABILITIES AND EQUITY	$630,008	$675,653

Consolidated_Balance_Sheets_Ba

Consolidated Balance Sheets Balance Sheet Parenthetical	Mar. 31, 2015	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2014
In Thousands, except Share data, unless otherwise specified	USD ($)	EUR (€)	USD ($)	EUR (€)
Allowance for Doubtful Accounts Receivable, Current	$4,228		$3,397
Common Stock, Par or Stated Value Per Share		€ 0.02		€ 0.02
Common Stock, Shares Authorized	200,000,000	200,000,000	200,000,000	200,000,000
Common Stock, Shares, Issued	45,600,002	45,600,002	45,600,002	45,600,002
Common Stock, Shares, Outstanding	42,976,340	42,976,340	43,636,984	43,636,984
Treasury Stock, Shares	2,623,662	2,623,662	1,963,018	1,963,018
Preferred Stock, Par or Stated Value Per Share		€ 0.02		€ 0.02
Preferred Stock, Shares Authorized	6,000,000	6,000,000	6,000,000	6,000,000
Preferred Stock, Shares Issued	0	0	0	0
Preferred Stock, Shares Outstanding	0	0	0	0

Consolidated_Statements_of_Ope

Consolidated Statements of Operations Statement (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
REVENUE:
Services	$162,974	$188,735
Product sales	50,669	74,168
Total revenue	213,643	262,903
OPERATING EXPENSES:
Cost of services, exclusive of depreciation expense shown below	102,795	110,571
Cost of product sales, exclusive of depreciation expense shown below	41,479	51,098
General and administrative expense, exclusive of depreciation expense shown below	12,674	10,519
Depreciation	6,345	6,342
Amortization	221	291
Other (income) expense, net	322	1,255
Severance and other charges	7,090	0
OPERATING INCOME	42,717	82,827
Interest expense	2,403	2,363
Income before income tax expense	40,314	80,464
Income tax expense	9,272	19,311
Net income	31,042	61,153
Net income (loss) attributable to non-controlling interest	-357	89
Net income attributable to Core Laboratories N.V.	$31,399	$61,064
EARNINGS PER SHARE INFORMATION:
Basic earnings per share attributable to Core Laboratories N.V. (in dollars per share)	$0.72	$1.36
Diluted earnings per share attributable to Core Laboratories N.V. (in dollars per share)	$0.72	$1.35
Cash dividends per share (in dollars per share)	$0.55	$0.50
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic	43,340	44,908
Diluted	43,466	45,182

Consolidated_Statement_of_Othe

Consolidated Statement of Other Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net income	$31,042	$61,153
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	-1,140	0
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion	243	0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	-897	0
Amortization to net income of transition asset	-22	-22
Amortization to net income of prior service cost	-19	2
Amortization to net income of actuarial loss	183	135
Income taxes on pension and other postretirement benefit plans	-35	-29
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	107	86
Other Comprehensive Income (Loss), Net of Tax	-790	86
Comprehensive income	30,252	61,239
Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest	-357	89
Comprehensive income attributable to Core Laboratories N.V.	$30,609	$61,150

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows Statement (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$31,042	$61,153
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	5,208	5,279
Depreciation and amortization	6,566	6,633
(Increase) decrease in value of life insurance policies	-816	-401
Deferred income taxes	1,996	-2,818
Other non-cash items	1,499	-163
Changes in assets and liabilities:
Accounts receivable	36,884	-7,098
Inventories	-5,937	-4,157
Prepaid expenses and other current assets	8,137	-5,109
Other assets	1,043	639
Accounts payable	1,635	915
Accrued expenses	-10,515	3,076
Increase (Decrease) in Deferred Revenue	3,768	6,594
Other long-term liabilities	-932	1,081
Net cash provided by operating activities	79,578	65,624
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	-6,869	-7,668
Patents and other intangibles	-186	0
Business acquisition, net of cash acquired	0	-1,200
Proceeds from sale of assets	726	227
Premiums on life insurance	-647	-1,834
Net cash used in investing activities	-6,976	-10,475
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of debt borrowings	-18,000	-28,011
Proceeds from debt borrowings	35,000	40,000
Excess tax benefits from stock-based compensation	-68	329
Debt financing costs	-174	0
Payments of Dividends	23,940	22,491
Repurchase of common shares	-69,633	-46,811
Net cash used in financing activities	-76,815	-56,984
NET CHANGE IN CASH AND CASH EQUIVALENTS	-4,213	-1,835
CASH AND CASH EQUIVALENTS, beginning of period	23,350	25,088
CASH AND CASH EQUIVALENTS, end of period	$19,137	$23,253

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The accompanying unaudited consolidated financial statements include the accounts of Core Laboratories N.V. and its subsidiaries for which we have a controlling voting interest and/or a controlling financial interest. These financial statements have been prepared in accordance with United States ("U.S.") generally accepted accounting principles ("GAAP") for interim financial information using the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, these financial statements do not include all of the information and footnote disclosures required by U.S. GAAP and should be read in conjunction with the audited financial statements and the summary of significant accounting policies and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2014 (the "2014 Annual Report").
	Core Laboratories N.V. uses the equity method of accounting for investments in which it has less than a majority interest and over which it does not exercise control but does exert significant influence. We use the cost method to record certain other investments in which we own less than 20% of the outstanding equity and do not exercise control or exert significant influence. Non-controlling interests have been recorded to reflect outside ownership attributable to consolidated subsidiaries that are less than 100% owned. In the opinion of management, all adjustments considered necessary for a fair statement of the results for the interim periods presented have been included in these financial statements. Furthermore, the operating results presented for the three months ended March 31, 2015 may not necessarily be indicative of the results that may be expected for the year ended December 31, 2015.
	Core Laboratories N.V.'s balance sheet information for the year ended December 31, 2014 was derived from the 2014 audited consolidated financial statements but does not include all disclosures in accordance with U.S. GAAP.
	Certain reclassifications were made to prior period amounts in order to conform to the current period presentation. These reclassifications had no impact on the reported net income or cash flows for the three months ended March 31, 2014.
	References to "Core Lab", the "Company", "we", "our" and similar phrases are used throughout this Quarterly Report on Form 10-Q and relate collectively to Core Laboratories N.V. and its consolidated subsidiaries.

Inventories

Inventories	3 Months Ended
	Mar. 31, 2015
Inventory Disclosure [Abstract]
Inventories	Inventories consist of the following (in thousands):
		March 31,		December 31,
		2015		2014
	Finished goods	$	35,743	$	32,249
	Parts and materials	10,888		9,147
	Work in progress	2,538		1,975
	Total inventories	$	49,169	$	43,371
	We include freight costs incurred for shipping inventory to customers in the Cost of product sales line of the Consolidated Statements of Operations.

Debt_and_Capital_Lease_Obligat

Debt and Capital Lease Obligations	3 Months Ended
	Mar. 31, 2015
Debt and Capital Lease Obligations [Abstract]
Debt and Capital Lease Obligations	Debt is summarized in the following table (in thousands):
		March 31,		December 31,
		2015		2014
	Senior notes	$	150,000	$	150,000
	Credit facility	223,000		206,000
	Long-term debt and capital lease obligations, net	$	373,000	$	356,000
	We have two series of senior notes outstanding with an aggregate principal amount of $150 million ("Senior Notes") issued in a private placement transaction. Series A consists of $75 million in aggregate principal amount of notes that bear interest at a fixed rate of 4.01% and are due in full on September 30, 2021. Series B consists of $75 million in aggregate principal amount of notes that bear interest at a fixed rate of 4.11% and are due in full on September 30, 2023. Interest on each series of the Senior Notes is payable semi-annually on March 30 and September 30.
	On March 13, 2015, we entered into an agreement to amend our revolving credit facility (the "Credit Facility") to increase the aggregate borrowing capacity from $350 million to $400 million and to keep the uncommitted availability of an additional $50 million to bring the total borrowings available to $450 million if certain prescribed conditions are met by the Company. The Credit Facility bears interest at variable rates from LIBOR plus 1.25% to a maximum of LIBOR plus 2.00%. Any outstanding balance under the Credit Facility is due August 29, 2019, when the Credit Facility matures. Our available capacity at any point in time is reduced by borrowings outstanding at the time and outstanding letters of credit which totaled $27.5 million at March 31, 2015, resulting in an available borrowing capacity under the Credit Facility of $149.5 million. In addition to those items under the Credit Facility, we had $12.6 million of outstanding letters of credit and performance guarantees and bonds from other sources as of March 31, 2015.
	The terms of the Credit Facility and the Senior Notes require us to meet certain covenants, including, but not limited to, certain minimum cash flow ratios. We believe that we are in compliance with all such covenants contained in our credit agreements. Certain of our material, wholly-owned subsidiaries are guarantors or co-borrowers under the Credit Facility and Senior Notes.
	In 2014, we entered into two interest rate swap agreements for a total notional amount of $50 million. See Note 11 - Derivative Instruments and Hedging Activities.
	The estimated fair value of total debt at March 31, 2015 and December 31, 2014 approximated the book value of total debt. The fair value was estimated using Level 2 inputs by calculating the sum of the discounted future interest and principal payments through the date of maturity.

Pensions_and_Other_Postretirem

Pensions and Other Postretirement Benefits	3 Months Ended
	Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Pensions and Other Postretirement Benefits	Defined Benefit Plan
	We provide a non-contributory defined benefit pension plan for substantially all of our Dutch employees ("Dutch Plan") who were hired prior to 2007 based on years of service and final pay or career average pay, depending on when the employee began participating. The benefits earned by the employees are immediately vested.
	The following table summarizes the components of net periodic pension cost under the Dutch Plan for the three months ended March 31, 2015 and 2014 (in thousands):
		Three Months Ended
		March 31,
		2015			2014
	Service cost	$	463		$	370
	Interest cost	309			450
	Expected return on plan assets	(256		)	(334		)
	Amortization of transition asset	(22		)	(22		)
	Amortization of prior service cost	(19		)	2
	Amortization of actuarial loss	183			135
	Net periodic pension cost	$	658		$	601
	During the three months ended March 31, 2015, we contributed approximately $0.8 million to fund the estimated 2015 premiums on investment contracts held by the Dutch Plan.
	Defined Contribution Plans
	We maintain defined contribution plans for the benefit of eligible employees in certain countries including Canada, The Netherlands, the United Kingdom, and the United States.
	Deferred Compensation Arrangements
	We have entered into deferred compensation contracts for certain key employees. The benefits under these contracts are fully vested and benefits are paid when the participants attain 65 years of age.
	We have adopted a non-qualified deferred compensation plan that allows certain highly compensated employees to defer a portion of their salary, commission and bonus, as well as the amount of any reductions in their deferrals under the deferred compensation plan for employees in the United States, due to certain limitations imposed by the U.S. Internal Revenue Code of 1986, as amended.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	We have been and may from time to time be named as a defendant in legal actions that arise in the ordinary course of business. These include, but are not limited to, employment-related claims and contractual disputes or claims for personal injury or property damage which occur in connection with the provision of our services and products. Management does not currently believe that any of our pending contractual, employment-related, personal injury or property damage claims and disputes will have a material effect on our future results of operations, financial position or cash flow.
	In connection with an audit of the 2008 and 2009 U.S. federal income tax returns of our U.S. consolidated group, the U.S. Internal Revenue Service has proposed that certain transfer pricing positions taken by the Company be adjusted, which could result in additional federal income tax of approximately $11 million plus interest for this two-year audit period. We believe that these transactions are valid as originally recorded, and we are appealing this proposed adjustment. It is our belief that we will prevail on this issue; consequently, we have made no additional income tax accrual for this proposed adjustment.

Equity

Equity	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Equity	During the three months ended March 31, 2015, we repurchased 683,290 of our common shares for $72.9 million. Included in this total were rights to 6,649 shares valued at $0.7 million that were surrendered to us pursuant to the terms of a stock-based compensation plan in consideration of the participants' tax burdens that may result from the issuance of common shares under that plan. Such common shares, unless canceled, may be reissued for a variety of purposes such as future acquisitions, non-employee director stock awards or employee stock awards. During the three months ended March 31, 2015, 22,646 treasury shares were distributed upon vesting of stock-based awards.
	In February 2015, we paid a quarterly dividend of $0.55 per share of common stock. In addition, on April 13, 2015, we declared a quarterly dividend of $0.55 per share of common stock for shareholders of record on April 24, 2015 and payable on May 22, 2015.
	The following table summarizes our changes in equity for the three months ended March 31, 2015 (in thousands):
		Common Shares			Additional Paid-In Capital			Retained Earnings			Accumulated			Treasury Stock			Non-Controlling Interest			Total Equity
											Other
											Comprehensive Income (Loss)
	December 31, 2014	$	1,174		$	—		$	415,906		$	(11,894	)	$	(317,613	)	$	6,420		$	93,993
	Stock based-awards	—			925			—			—			4,283			—			5,208
	Tax benefit of stock-based awards issued	—			(68		)	—			—			—			—			(68		)
	Repurchase of common shares	—			—			—			—			(72,898		)	—			(72,898		)
	Dividends paid	—			—			(23,940		)	—			—			—			(23,940		)
	Amortization of deferred pension costs, net of tax	—			—			—			105			—			—			105
	Interest rate swaps	—			—			—			(897		)	—			—			(897		)
	Net income (loss)	—			—			31,399			—			—			(357		)	31,042
	March 31, 2015	$	1,174		$	857		$	423,365		$	(12,686	)	$	(386,228	)	$	6,063		$	32,545
	Accumulated other comprehensive income (loss) consisted of the following (in thousands):
		March 31,			December 31,
		2015			2014
	Transition asset	$	49		$	65
	Prior service cost	704			718
	Unrecognized net actuarial loss	(11,460		)	(11,595		)
	Fair value of derivatives	(1,979		)	(1,082		)
	Total accumulated other comprehensive income (loss)	$	(12,686	)	$	(11,894	)

Earnings_per_Share

Earnings per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings per Share	We compute basic earnings per common share by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. Diluted earnings per common and potential common shares include additional shares in the weighted average share calculations associated with the incremental effect of dilutive restricted stock awards and contingently issuable shares, as determined using the treasury stock method. The following table summarizes the calculation of weighted average common shares outstanding used in the computation of diluted earnings per share (in thousands):
		Three Months Ended
		March 31,
		2015	2014
	Weighted average basic common shares outstanding	43,340	44,908
	Effect of dilutive securities:
	Performance shares	64	100
	Restricted stock	62	174
	Weighted average diluted common and potential common shares outstanding	43,466	45,182

Other_Income_Expense_Net

Other (Income) Expense, Net	3 Months Ended
	Mar. 31, 2015
Other Income and Expenses [Abstract]
Other (Income) Expense, Net	The components of other (income) expense, net, were as follows (in thousands):
		Three Months Ended
		March 31,
		2015			2014
	Sale of assets	$	(135	)	$	(118	)
	Results of non-consolidated subsidiaries	(44		)	(78		)
	Foreign exchange	840			1,600
	Rents and royalties	(136		)	(224		)
	Other, net	(203		)	75
	Total other (income) expense, net	$	322		$	1,255
	Foreign exchange (gain) loss by currency is summarized in the following table (in thousands):
		Three Months Ended
		March 31,
		2015			2014
	Australian Dollar	119			(6		)
	British Pound	374			(52		)
	Canadian Dollar	1,274			1,028
	Euro	(1,055		)	52
	Russian Ruble	(52		)	176
	Other currencies, net	180			402
	Total (gain) loss	$	840		$	1,600

Income_Tax_Expense

Income Tax Expense	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Tax Expense	The effective tax rates for the three months ended March 31, 2015 and 2014 were 23.0% and 24.0%, respectively. The change in tax expense is primarily the result of changes in activity levels among jurisdictions with different tax rates.

Severance_and_Other_Charges_No

Severance and Other Charges (Notes)	3 Months Ended
	Mar. 31, 2015
Other Income and Expenses [Abstract]
Other Income and Other Expense Disclosure [Text Block]	10.  SEVERANCE AND OTHER CHARGES
	In response to lower commodity pricing and reduced spending by our clients related to oil and gas producing fields in 2015, we decided during the first quarter of 2015 to reduce our cost structure, primarily through a reduction in our workforce, to better align with anticipated activity levels for 2015, which is summarized below. As a result of these cost reductions, we recorded a charge of $7.1 million in the first quarter of 2015. Depending on how the market situation evolves, further actions may be necessary, which could result in additional charges in future periods.
	•Reduction in Force ($6.4 million): termination benefits expensed and paid or accrued at March 31, 2015,
	•Facility Exit Costs ($0.5 million), and
	•Asset Write-Offs ($0.2 million): write-off of assets that have no associated future cash flows.

Derivative_Instruments_Notes

Derivative Instruments (Notes)	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	11.  DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES
	We are exposed to market risks related to fluctuations in interest rates. To mitigate these risks, we utilize derivative instruments in the form of interest rate swaps. We do not enter into derivative transactions for speculative purposes.
	Interest Rate Risk
	Our Credit Facility bears interest at variable rates from LIBOR plus 1.25% to a maximum of LIBOR plus 2.00%. We are subject to interest rate risk on the debt carried through our Credit Facility.
	In 2014, we entered into two interest rate swap agreements for a total notional amount of $50 million to hedge changes in the variable rate interest expense on $50 million of our existing or replacement LIBOR-priced debt. Under the first swap agreement of $25 million, we have fixed the interest rate at 2.98% through August 29, 2019, and under the second swap agreement of $25 million, we have fixed the interest rate at 3.75% through August 29, 2024. Each swap is measured at fair value and recorded in our Consolidated Balance Sheet as a liability. They are designated and qualify as cash flow hedging instruments and are highly effective. Unrealized gains/losses are deferred to shareholders' equity as a component of accumulated other comprehensive income/loss and are recognized in income as a decrease/increase to interest expense in the period in which the related cash flows being hedged are recognized in expense.
	At March 31, 2015, we had fixed rate debt aggregating $200 million and variable rate debt aggregating $173 million, after taking into account the effect of the swaps.
	The fair values of outstanding derivative instruments are as follows:
		Fair Value of Derivatives
		31-Mar-15		31-Dec-14		Balance Sheet Classification
	Derivatives designated as hedges:
	5 year interest rate swap	$	497	$	201	Other long-term liabilities
	10 year interest rate swap	1,482		881		Other long-term liabilities
		$	1,979	$	1,082
	The fair value of all outstanding derivatives was determined using a model with inputs that are observable in the market (Level 2) or can be derived from or corroborated by observable data.
	The effect of the interest rate swaps on the Consolidated Statement of Operations was as follows:
		Three Months Ended
		31-Mar-15		31-Mar-14		Income Statement Classification
	Derivatives designated as hedges:
	5 year interest rate swap	$	97	$	—	Increase to interest expense
	10 year interest rate swap	146		—		Increase to interest expense
		$	243	$	—

Financial_Instruments_Notes

Financial Instruments (Notes)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	12.  FINANCIAL INSTRUMENTS
	The Company's only financial assets and liabilities which involve fair value measures relate to certain aspects of the Company's benefit plans and our derivative instruments. We use the market approach to value certain assets and liabilities at fair value using significant other observable inputs (Level 2) with the assistance of a third party specialist. We do not have any assets or liabilities measured at fair value on a recurring basis using quoted prices in an active market (Level 1) or significant unobservable inputs (Level 3). Gains and losses related to the fair value changes in the deferred compensation assets and liabilities are recorded in General and Administrative Expense in the Consolidated Statements of Operations. Gains and losses related to the fair value of the interest rate swaps are recorded in Other Comprehensive Income. The following table summarizes the fair value balances (in thousands):
				Fair Value Measurement at
				March 31, 2015
		Total		Level 1		Level 2		Level 3
	Assets:
	Deferred compensation trust assets (1)	$	24,209	$	—	$	24,209	$	—
	Liabilities:
	Deferred compensation plan	$	29,492	$	—	$	29,492	$	—
	5 year interest rate swap	497		—		497		—
	10 year interest rate swap	1,482		—		1,482		—
		$	31,471	$	—	$	31,471	$	—
				Fair Value Measurement at
				December 31, 2014
		Total		Level 1		Level 2		Level 3
	Assets:
	Deferred compensation trust assets (1)	$	24,199	$	—	$	24,199	$	—
	Liabilities:
	Deferred compensation plan	$	29,153	$	—	$	29,153	$	—
	5 year interest rate swap	201		—		201		—
	10 year interest rate swap	881		—		881		—
		$	30,235	$	—	$	30,235	$	—
	(1) Trust assets consist of the cash surrender value of life insurance policies intended to assist in the funding of the deferred compensation plan and are included in Other assets in the Balance Sheet.

Segment_Reporting

Segment Reporting	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Segment Reporting	We operate our business in three reportable segments.  These complementary segments provide different services and products and utilize different technologies for improving reservoir performance and increasing oil and gas recovery from new and existing fields.
	•	Reservoir Description: Encompasses the characterization of petroleum reservoir rock, fluid and gas samples. We provide analytical and field services to characterize properties of crude oil and petroleum products to the oil and gas industry.
	•	Production Enhancement: Includes services and products relating to reservoir well completions, perforations, stimulations and production. We provide integrated services to evaluate the effectiveness of well completions and to develop solutions aimed at increasing the effectiveness of enhanced oil recovery projects.
	•	Reservoir Management: Combines and integrates information from reservoir description and production enhancement services to increase production and improve recovery of oil and gas from our clients' reservoirs.
	Results for these segments are presented below. We use the same accounting policies to prepare our segment results as are used to prepare our Consolidated Financial Statements. All interest and other non-operating income (expense) is attributable to the Corporate & Other area and is not allocated to specific segments. Summarized financial information concerning our segments is shown in the following table (in thousands):
		Reservoir Description		Production Enhancement		Reservoir Management		Corporate & Other 1			Consolidated
	Three Months Ended March 31, 2015
	Revenue from unaffiliated clients	$	121,759	$	75,145	$	16,739	$	—		$	213,643
	Inter-segment revenue	2,776		717		149		(3,642		)	—
	Segment operating income (loss)	28,530		9,923		3,866		398			42,717
	Total assets (at end of period)	312,129		233,414		29,505		54,960			630,008
	Capital expenditures	4,437		1,803		221		408			6,869
	Depreciation and amortization	3,783		1,761		431		591			6,566
	Three Months Ended March 31, 2014
	Revenue from unaffiliated clients	$	125,256	$	110,280	$	27,367	$	—		$	262,903
	Inter-segment revenue	2,769		797		420		(3,986		)	—
	Segment operating income (loss)	34,853		37,202		10,474		298			82,827
	Total assets (at end of period)	325,139		263,351		35,676		56,197			680,363
	Capital expenditures	4,816		1,075		85		1,692			7,668
	Depreciation and amortization	3,848		1,895		239		651			6,633
	(1) "Corporate & Other" represents those items that are not directly related to a particular segment and eliminations.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2015
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	In May 2014, the FASB issued ASU 2014-09 relating to revenue from contracts with customers (FASB ASC Topic 606), which provides guidance on revenue recognition. The core principle of this guidance is that an entity should recognize revenue 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. This guidance requires entities to apply a five-step method to (1) identify the contract(s) with customers; (2) identify the performance obligation(s) in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligation(s) in the contract; and (5) recognize revenue when (or as) the entity satisfies a performance obligation. This pronouncement is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016. We are evaluating the impact that the adoption of this standard will have on our consolidated financial statements.
	In February 2015, the FASB issued ASU 2015-02 which affects reporting entities that are required to evaluate whether they should consolidate certain legal entities. All legal entities are subject to reevaluation under the revised consolidation model. Specifically, the amendments: (1) modify the evaluation of whether limited partnerships and similar legal entities are variable interest entities (VIEs) or voting interest entities; (2) eliminate the presumption that a general partner should consolidate a limited partnership; (3) affect the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships; and (4) provide a scope exception from consolidation guidance for reporting entities with interest in legal entities that are required to comply with or operate in accordance with requirements that are similar to those for registered money market funds. This pronouncement is effective for public business entities for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. We are evaluating the impact that the adoption of this standard will have on our consolidated financial statements.

Inventories_Tables

Inventories (Tables)	3 Months Ended
	Mar. 31, 2015
Inventory Disclosure [Abstract]
Schedule of Inventory, Current	Inventories consist of the following (in thousands):
		March 31,		December 31,
		2015		2014
	Finished goods	$	35,743	$	32,249
	Parts and materials	10,888		9,147
	Work in progress	2,538		1,975
	Total inventories	$	49,169	$	43,371

Debt_and_Capital_Lease_Obligat1

Debt and Capital Lease Obligations (Tables)	3 Months Ended
	Mar. 31, 2015
Debt and Capital Lease Obligations [Abstract]
Schedule of Long-term Debt Instruments	Debt is summarized in the following table (in thousands):
		March 31,		December 31,
		2015		2014
	Senior notes	$	150,000	$	150,000
	Credit facility	223,000		206,000
	Long-term debt and capital lease obligations, net	$	373,000	$	356,000

Pensions_and_Other_Postretirem1

Pensions and Other Postretirement Benefits (Tables)	3 Months Ended
	Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Schedule of Net Benefit Costs	The following table summarizes the components of net periodic pension cost under the Dutch Plan for the three months ended March 31, 2015 and 2014 (in thousands):
		Three Months Ended
		March 31,
		2015			2014
	Service cost	$	463		$	370
	Interest cost	309			450
	Expected return on plan assets	(256		)	(334		)
	Amortization of transition asset	(22		)	(22		)
	Amortization of prior service cost	(19		)	2
	Amortization of actuarial loss	183			135
	Net periodic pension cost	$	658		$	601

Equity_Tables

Equity (Tables)	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Schedule of Stockholders Equity	The following table summarizes our changes in equity for the three months ended March 31, 2015 (in thousands):
		Common Shares			Additional Paid-In Capital			Retained Earnings			Accumulated			Treasury Stock			Non-Controlling Interest			Total Equity
											Other
											Comprehensive Income (Loss)
	December 31, 2014	$	1,174		$	—		$	415,906		$	(11,894	)	$	(317,613	)	$	6,420		$	93,993
	Stock based-awards	—			925			—			—			4,283			—			5,208
	Tax benefit of stock-based awards issued	—			(68		)	—			—			—			—			(68		)
	Repurchase of common shares	—			—			—			—			(72,898		)	—			(72,898		)
	Dividends paid	—			—			(23,940		)	—			—			—			(23,940		)
	Amortization of deferred pension costs, net of tax	—			—			—			105			—			—			105
	Interest rate swaps	—			—			—			(897		)	—			—			(897		)
	Net income (loss)	—			—			31,399			—			—			(357		)	31,042
	March 31, 2015	$	1,174		$	857		$	423,365		$	(12,686	)	$	(386,228	)	$	6,063		$	32,545
Schedule of Accumulated Other Comprehensive Income (Loss)	Accumulated other comprehensive income (loss) consisted of the following (in thousands):
		March 31,			December 31,
		2015			2014
	Transition asset	$	49		$	65
	Prior service cost	704			718
	Unrecognized net actuarial loss	(11,460		)	(11,595		)
	Fair value of derivatives	(1,979		)	(1,082		)
	Total accumulated other comprehensive income (loss)	$	(12,686	)	$	(11,894	)

Earnings_per_Share_Tables

Earnings per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Schedule of Weighted Average Number of Shares	The following table summarizes the calculation of weighted average common shares outstanding used in the computation of diluted earnings per share (in thousands):
		Three Months Ended
		March 31,
		2015	2014
	Weighted average basic common shares outstanding	43,340	44,908
	Effect of dilutive securities:
	Performance shares	64	100
	Restricted stock	62	174
	Weighted average diluted common and potential common shares outstanding	43,466	45,182

Other_Income_Expense_Net_Table

Other (Income) Expense, Net (Tables)	3 Months Ended
	Mar. 31, 2015
Other Income and Expenses [Abstract]
Foreign Currency Gains Losses By Currency	Foreign exchange (gain) loss by currency is summarized in the following table (in thousands):
		Three Months Ended
		March 31,
		2015			2014
	Australian Dollar	119			(6		)
	British Pound	374			(52		)
	Canadian Dollar	1,274			1,028
	Euro	(1,055		)	52
	Russian Ruble	(52		)	176
	Other currencies, net	180			402
	Total (gain) loss	$	840		$	1,600
Schedule of Other Operating Cost and Expense, by Component	The components of other (income) expense, net, were as follows (in thousands):
		Three Months Ended
		March 31,
		2015			2014
	Sale of assets	$	(135	)	$	(118	)
	Results of non-consolidated subsidiaries	(44		)	(78		)
	Foreign exchange	840			1,600
	Rents and royalties	(136		)	(224		)
	Other, net	(203		)	75
	Total other (income) expense, net	$	322		$	1,255

Derivative_Instruments_Tables

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2015
Derivatives, Fair Value [Line Items]
Schedule of Derivative Liabilities at Fair Value [Table Text Block]	The fair values of outstanding derivative instruments are as follows:
		Fair Value of Derivatives
		31-Mar-15		31-Dec-14		Balance Sheet Classification
	Derivatives designated as hedges:
	5 year interest rate swap	$	497	$	201	Other long-term liabilities
	10 year interest rate swap	1,482		881		Other long-term liabilities
		$	1,979	$	1,082

Derivative_Instruments_Derivat

Derivative Instruments Derivative Instruments Gain Loss Table (Tables)	3 Months Ended
	Mar. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]	The effect of the interest rate swaps on the Consolidated Statement of Operations was as follows:
		Three Months Ended
		31-Mar-15		31-Mar-14		Income Statement Classification
	Derivatives designated as hedges:
	5 year interest rate swap	$	97	$	—	Increase to interest expense
	10 year interest rate swap	146		—		Increase to interest expense
		$	243	$	—

Financial_Instruments_Tables

Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements, Nonrecurring [Table Text Block]
				Fair Value Measurement at
				March 31, 2015
		Total		Level 1		Level 2		Level 3
	Assets:
	Deferred compensation trust assets (1)	$	24,209	$	—	$	24,209	$	—
	Liabilities:
	Deferred compensation plan	$	29,492	$	—	$	29,492	$	—
	5 year interest rate swap	497		—		497		—
	10 year interest rate swap	1,482		—		1,482		—
		$	31,471	$	—	$	31,471	$	—
				Fair Value Measurement at
				December 31, 2014
		Total		Level 1		Level 2		Level 3
	Assets:
	Deferred compensation trust assets (1)	$	24,199	$	—	$	24,199	$	—
	Liabilities:
	Deferred compensation plan	$	29,153	$	—	$	29,153	$	—
	5 year interest rate swap	201		—		201		—
	10 year interest rate swap	881		—		881		—
		$	30,235	$	—	$	30,235	$	—
	(1) Trust assets consist of the cash surrender value of life insurance policies intended to assist in the funding of the deferred compensation plan and are included in Other assets in the Balance Sheet.

Segment_Reporting_Tables

Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Summarized financial information concerning our segments is shown in the following table (in thousands):
		Reservoir Description		Production Enhancement		Reservoir Management		Corporate & Other 1			Consolidated
	Three Months Ended March 31, 2015
	Revenue from unaffiliated clients	$	121,759	$	75,145	$	16,739	$	—		$	213,643
	Inter-segment revenue	2,776		717		149		(3,642		)	—
	Segment operating income (loss)	28,530		9,923		3,866		398			42,717
	Total assets (at end of period)	312,129		233,414		29,505		54,960			630,008
	Capital expenditures	4,437		1,803		221		408			6,869
	Depreciation and amortization	3,783		1,761		431		591			6,566
	Three Months Ended March 31, 2014
	Revenue from unaffiliated clients	$	125,256	$	110,280	$	27,367	$	—		$	262,903
	Inter-segment revenue	2,769		797		420		(3,986		)	—
	Segment operating income (loss)	34,853		37,202		10,474		298			82,827
	Total assets (at end of period)	325,139		263,351		35,676		56,197			680,363
	Capital expenditures	4,816		1,075		85		1,692			7,668
	Depreciation and amortization	3,848		1,895		239		651			6,633

Inventories_Details

Inventories (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]
Finished goods	$35,743	$32,249
Parts and materials	10,888	9,147
Work in progress	2,538	1,975
Total inventories	$49,169	$43,371

Debt_and_Capital_Lease_Obligat2

Debt and Capital Lease Obligations (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Total debt	$373,000,000	$356,000,000
Less - current maturities of long-term debt and capital lease obligations	0	0
Line of credit facility, current borrowing capacity	400,000,000	350,000,000
Line of Credit Facility, Extension Capacity	50,000,000
Line of credit facility, maximum borrowing capacity	450,000,000
Performance bonds under credit facility	27,500,000
Line of credit facility, remaining borrowing capacity	149,500,000
Performance bonds	12,600,000
Long-term Debt, Excluding Current Maturities	373,000,000	356,000,000
Senior Notes [Member]
Debt Instrument [Line Items]
Total debt	150,000,000	150,000,000
Face amount	150,000,000
Line of Credit [Member]
Debt Instrument [Line Items]
Total debt	223,000,000	206,000,000
Maturity date	29-Aug-19
Senior Notes Series A [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.01%
Face amount	75,000,000
Maturity date	30-Sep-21
Senior Notes Series B [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.11%
Face amount	75,000,000
Maturity date	30-Sep-23
Minimum [Member]
Debt Instrument [Line Items]
Derivative, Basis Spread on Variable Rate	1.25%
Maximum [Member]
Debt Instrument [Line Items]
Derivative, Basis Spread on Variable Rate	2.00%
Interest Rate Swap [Member]
Debt Instrument [Line Items]
Derivative, Notional Amount	$50,000,000

Pensions_and_Other_Postretirem2

Pensions and Other Postretirement Benefits (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Service cost	$463,000	$370,000
Interest cost	309,000	450,000
Expected return on plan assets	-256,000	-334,000
Amortization of transition asset	22,000	22,000
Amortization of prior service cost	19,000	-2,000
Amortization of actuarial loss	183,000	135,000
Net periodic pension cost	658,000	601,000
Contributions by employer	$800,000

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (Tax positions challenged during tax audit [Member], USD $)	Mar. 31, 2015
In Millions, unless otherwise specified
Tax positions challenged during tax audit [Member]
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss	$11

Equity_Narrative_Details

Equity (Narrative) (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Equity [Abstract]
Treasury sock, shares, acquired	683,290
Treasury stock, value, acquired	$72.90
Treasury shares, acquired, tax burden	6,649
Treasury shares, acquired, value, tax burden	$0.70
Cash dividends per share (in dollars per share)	$0.55	$0.50
Dividends declared (in dollars per share)	$0.55

Equity_Details

Equity (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$93,993
Stock based-awards	5,208
Tax benefit of stock-based awards issued	-68
Repurchase of common shares	-72,898
Dividends paid	-23,940
Amortization of deferred pension costs, net of tax	105
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	-897	0
Net income (loss)	31,042	61,153
Net income (loss) attributable to non-controlling interest	-357	89
Ending balance	32,545
Common Shares [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,174
Stock based-awards	0
Tax benefit of stock-based awards issued	0
Repurchase of common shares	0
Dividends paid	0
Amortization of deferred pension costs, net of tax	0
Net income (loss)	0
Ending balance	1,174
Additional Paid-In Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	0
Stock based-awards	925
Tax benefit of stock-based awards issued	-68
Repurchase of common shares	0
Dividends paid	0
Amortization of deferred pension costs, net of tax	0
Net income (loss)	0
Ending balance	857
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	415,906
Stock based-awards	0
Tax benefit of stock-based awards issued	0
Repurchase of common shares	0
Dividends paid	-23,940
Amortization of deferred pension costs, net of tax	0
Net income (loss)	31,399
Ending balance	423,365
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	-11,894
Stock based-awards	0
Tax benefit of stock-based awards issued	0
Repurchase of common shares	0
Dividends paid	0
Amortization of deferred pension costs, net of tax	105
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	-897
Net income (loss)	0
Ending balance	-12,686
Treasury Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	-317,613
Stock based-awards	4,283
Tax benefit of stock-based awards issued	0
Repurchase of common shares	-72,898
Dividends paid	0
Amortization of deferred pension costs, net of tax	0
Net income (loss)	0
Ending balance	-386,228
Non-Controlling Interests [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	6,420
Stock based-awards	0
Tax benefit of stock-based awards issued	0
Repurchase of common shares	0
Dividends paid	0
Amortization of deferred pension costs, net of tax	0
Ending balance	$6,063

Equity_Comprehensive_Income_De

Equity (Comprehensive Income) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Equity [Abstract]
Prior service cost	$704	$718
Transition asset	49	65
Unrecognized net actuarial loss	-11,460	-11,595
Derivative, Fair Value, Net	-1,979	-1,082
Total accumulated other comprehensive income (loss)	($12,686)	($11,894)

Earnings_per_Share_Details

Earnings per Share (Details)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Weighted average basic common shares outstanding	43,340	44,908
Performance shares (in shares)	64	100
Restricted stock (in shares)	62	174
Weighted average diluted common and potential common shares outstanding	43,466	45,182

Other_Income_Expense_Net_Detai

Other (Income) Expense, Net (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Other Income and Expenses [Abstract]
Sale of assets	($135)	($118)
Results of non-consolidated subsidiaries	-44	-78
Foreign exchange	840	1,600
Rents and royalties	-136	-224
Other, net	-203	75
Total other (income) expense, net	$322	$1,255

Other_Income_Expense_Net_Forei

Other (Income) Expense, Net (Foreign Currency (Gain ) Loss by Currency) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Foreign exchange	$840	$1,600
AustralianDollar [Member]
Foreign exchange	119	-6
British Pound [Member]
Foreign exchange	374	-52
Canadian Dollar [Member]
Foreign exchange	1,274	1,028
Euro [Member]
Foreign exchange	-1,055	52
Russian Ruble [Member]
Foreign exchange	-52	176
Other Currencies Net [Member]
Foreign exchange	$180	$402

Income_Tax_Expense_Details

Income Tax Expense (Details)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Effective income tax rate	23.00%	24.00%

Severance_and_Other_Charges_De

Severance and Other Charges (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Other Income and Expenses [Abstract]
Severance and other charges	$7,090,000	$0
Severance Costs	6,400,000
Business Exit Costs	500,000
Asset write-offs	$200,000

Derivative_Instruments_Details

Derivative Instruments (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$1,979,000	$1,082,000
Derivative, Notional Amount	50,000,000
Interest Rate Swap No. 1 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	1,482,000	881,000
Derivative, Notional Amount	25,000,000
Derivative, Fixed Interest Rate	3.75%
Derivative, Maturity Date	29-Aug-24
Interest Rate Swap No. 2 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	497,000	201,000
Derivative, Notional Amount	$25,000,000
Derivative, Fixed Interest Rate	2.98%
Derivative, Maturity Date	29-Aug-19

Derivative_Instruments_Longter

Derivative Instruments Long-term debt (Details) (USD $)	Mar. 31, 2015
In Millions, unless otherwise specified
Debt Disclosure in Derivatives Footnote [Abstract]
Long-term Debt, Percentage Bearing Variable Interest, Amount	$173
Long-term Debt, Percentage Bearing Fixed Interest, Amount	$200

Derivative_Instruments_Derivat1

Derivative Instruments Derivative gain loss table (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	$243	$0
Interest Rate Swap No. 1 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	146	0
Interest Rate Swap No. 2 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	$97	$0

Financial_Instruments_FInancia

Financial Instruments FInancial Instruments (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$24,209	$24,199
Deferred Compensation Liability, Current and Noncurrent	29,492	29,153
Financial and Nonfinancial Liabilities, Fair Value Disclosure	31,471	30,235
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	24,209	24,199
Deferred Compensation Liability, Current and Noncurrent	29,492	29,153
Financial and Nonfinancial Liabilities, Fair Value Disclosure	31,471	30,235
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Interest Rate Swap No. 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	497	201
Interest Rate Swap No. 2 [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	0	0
Interest Rate Swap No. 2 [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	497	201
Interest Rate Swap No. 2 [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	0	0
Interest Rate Swap No. 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	1,482	881
Interest Rate Swap No. 1 [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	0	0
Interest Rate Swap No. 1 [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	1,482	881
Interest Rate Swap No. 1 [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$0	$0

Segment_Reporting_Details

Segment Reporting (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenue from unaffiliated clients	$213,643	$262,903
Inter-segment revenue	0	0
Segment operating income (loss)	42,717	82,827
Total assets (at end of period)	630,008	680,363	675,653
Capital expenditures	6,869	7,668
Depreciation and amortization	6,566	6,633
Operating Segments [Member] | Reservoir Description [Member]
Segment Reporting Information [Line Items]
Revenue from unaffiliated clients	121,759	125,256
Inter-segment revenue	2,776	2,769
Segment operating income (loss)	28,530	34,853
Total assets (at end of period)	312,129	325,139
Capital expenditures	4,437	4,816
Depreciation and amortization	3,783	3,848
Operating Segments [Member] | Production Enhancement [Member]
Segment Reporting Information [Line Items]
Revenue from unaffiliated clients	75,145	110,280
Inter-segment revenue	717	797
Segment operating income (loss)	9,923	37,202
Total assets (at end of period)	233,414	263,351
Capital expenditures	1,803	1,075
Depreciation and amortization	1,761	1,895
Operating Segments [Member] | Reservoir Management [Member]
Segment Reporting Information [Line Items]
Revenue from unaffiliated clients	16,739	27,367
Inter-segment revenue	149	420
Segment operating income (loss)	3,866	10,474
Total assets (at end of period)	29,505	35,676
Capital expenditures	221	85
Depreciation and amortization	431	239
Corporate & Other [Member]
Segment Reporting Information [Line Items]
Revenue from unaffiliated clients	0	0
Inter-segment revenue	-3,642	-3,986
Segment operating income (loss)	398	298
Total assets (at end of period)	54,960	56,197
Capital expenditures	408	1,692
Depreciation and amortization	$591	$651