Core Laboratories (CLB) 10-K 12 Feb 16 2015 FY Annual report Financial data

DEI Document

DEI Document - USD ($)	12 Months Ended
	Dec. 31, 2015	Feb. 11, 2016	Jun. 30, 2015
Document Entity Information [Abstract]
Entity Registrant Name	CORE LABORATORIES N V
Entity Central Index Key	1,000,229
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		42,376,390
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 4,772,496,453

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and Cash Equivalents, at Carrying Value	$ 22,494	$ 23,350
Accounts receivable, net of allowance for doubtful accounts of $4,136 and $3,397 at 2015 and 2014, respectively	145,689	197,163
Inventories, net	40,906	43,371
Prepaid Expense, Current	12,053	14,246
Income Taxes Receivable, Current	7,209	10,980
Other Assets, Current	10,196	12,710
TOTAL CURRENT ASSETS	238,547	301,820
Property, Plant and Equipment, Net	143,211	149,014
INTANGIBLES, net	10,041	10,642
GOODWILL	178,159	164,464
Deferred Tax Assets, Net, Noncurrent	11,693	3,876
Other Assets, Noncurrent	43,607	43,509
TOTAL ASSETS	625,258	673,325
CURRENT LIABILITIES:
Accounts payable	33,474	47,084
Accrued payroll and related costs	36,475	34,617
Taxes other than payroll and income	9,495	11,199
Unearned revenues	14,101	11,009
Income taxes payable	1,733	8,333
Other accrued expenses	25,480	19,624
TOTAL CURRENT LIABILITIES	120,758	131,866
LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS	430,987	353,672
DEFERRED COMPENSATION	43,478	42,705
Deferred Tax Liabilities, Noncurrent	4,881	7,210
Other Liabilities, Noncurrent	$ 48,853	$ 43,879
COMMITMENTS AND CONTINGENCIES
EQUITY:
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, 44,350,002 issued and 42,375,905 outstanding at 2015 and 45,600,002 issued and 43,636,984 outstanding at 2014	1,142	1,174
Additional paid-in capital	0	0
Retained Earnings (Accumulated Deficit)	219,207	415,906
Accumulated Other Comprehensive Income (Loss), Net of Tax	(10,538)	(11,894)
Treasury shares (at cost), 1,974,097 at 2015 and 1,963,018 at 2014	(238,875)	(317,613)
Total Core Laboratories N.V. shareholders' equity	(29,064)	87,573
Stockholders' Equity Attributable to Noncontrolling Interest	5,365	6,420
TOTAL EQUITY	(23,699)	93,993
TOTAL LIABILITIES AND EQUITY	$ 625,258	$ 673,325

Consolidated Balance Sheets Bal

Consolidated Balance Sheets Balance Sheet Parenthetical $ in Thousands	Dec. 31, 2015USD ($)shares	Dec. 31, 2015€ / shares	Dec. 31, 2014USD ($)shares	Dec. 31, 2014€ / shares
Allowance for Doubtful Accounts Receivable, Current | $	$ 4,136		$ 3,397
Common Stock, Par or Stated Value Per Share | € / shares		€ 0.02		€ 0.02
Common Stock, Shares Authorized	200,000,000		200,000,000
Common Stock, Shares, Issued	44,350,002		45,600,002
Common Stock, Shares, Outstanding	42,375,905		43,636,984
Treasury Stock, Shares	1,974,097		1,963,018
Preferred Stock, Par or Stated Value Per Share | € / shares		€ 0.02		€ 0.02
Preferred Stock, Shares Authorized	6,000,000		6,000,000
Preferred Stock, Shares Issued	0		0
Preferred Stock, Shares Outstanding	0		0

Statement of Income

Statement of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
REVENUES:
Sales Revenue, Services, Net	$ 611,954	$ 780,872	$ 765,428
Sales Revenue, Goods, Net	185,566	304,350	308,080
Total Revenue	797,520	1,085,222	1,073,508
OPERATING EXPENSES:
Cost of services, exclusive of depreciation shown below	387,739	449,488	444,963
Cost of product sales, exclusive of depreciation shown below	144,913	215,783	218,005
General and administrative expenses, exclusive of depreciation shown below	49,729	45,655	51,988
Depreciation	26,545	25,297	24,168
Amortization	912	1,399	1,303
Other (income) expense, net	3,669	1,069	(338)
Severance and other charges	22,943	0	0
Income Before Interest Expense and Taxes	161,070	346,531	333,419
Interest expense	12,380	10,600	9,317
Income before income tax expense	148,690	335,931	324,102
Income Tax Expense (Benefit)	33,758	77,305	80,908
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	114,932	258,626	243,194
Net Income (Loss) Attributable to Noncontrolling Interest	85	1,141	383
Net income attributable to Core Laboratories N.V.	$ 114,847	$ 257,485	$ 242,811
EARNINGS PER SHARE INFORMATION:
Earnings Per Share, Basic	$ 2.69	$ 5.80	$ 5.31
Earnings Per Share, Diluted	2.68	5.77	5.28
Cash dividends per share	$ 2.20	$ 2	$ 1.28
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Weighted Average Number of Shares Outstanding, Basic	42,747	44,362	45,692
Weighted Average Number of Shares Outstanding, Diluted	42,908	44,600	45,994

Consolidated Statement of Other

Consolidated Statement of Other Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 114,932	$ 258,626	$ 243,194
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	(1,471)	(1,327)	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent	83	(1,082)	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	971	245	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	583	0	0
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	1,151	(4,399)	(1,407)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit), Tax	0	1,024	583
Defined Benefit Plan, Amortization of Transition Obligations (Assets)	(96)	(87)	(87)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(85)	7	159
Defined Benefit Plan, Amortization of Gains (Losses)	727	540	468
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax	(424)	729	71
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	122	1,189	611
Other Comprehensive Income (Loss), Net of Tax	1,356	(3,268)	(213)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	116,288	255,358	242,981
Net Income (Loss) Attributable to Noncontrolling Interest	85	1,141	383
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 116,203	$ 254,217	$ 242,598

Statement of Shareholders' Equi

Statement of Shareholders' Equity - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]
Common Stock, Shares, Outstanding at Dec. 31, 2012		47,899,584				1,550,173
Common Stock, Value, Issued at Dec. 31, 2012	$ 187,913,000	$ 1,233,000	$ 0	$ 361,255,000	$ (8,413,000)	$ (171,845,000)	$ 5,683,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, Stock Options Exercised	83,000	$ 0	(1,411,000)	0	0	$ 1,494,000	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period						(12,000)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		0				(222,176)
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	20,526,000	$ 0	1,047,000	(5,509,000)	0	$ 24,988,000	0
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	3,744,000	0	3,744,000	0	0	0	0
Stock Repurchased During Period, Value	(227,216,000)	$ 0	0	0	0	$ (227,216,000)	0
Stock Repurchased During Period, Shares		0				1,482,198
Dividends	(58,642,000)	$ 0	0	(58,642,000)	0	$ 0	0
Treasury Stock, Retired, Cost Method, Amount	0	$ (30,000)	(3,380,000)	(123,985,000)	0	$ 127,395,000	0
Treasury Stock, Shares, Retired		(1,149,582)				(1,149,582)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Other Comprehensive Income (Loss), Net of Tax	213,000	$ 0	0	0	(213,000)	$ 0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	243,194,000	0	0	242,811,000	0	0
Net Income (Loss) Attributable to Noncontrolling Interest	383,000						383,000
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	242,981,000
Common Stock, Value, Issued Period End at Dec. 31, 2013	169,389,000	$ 1,203,000	0	415,930,000	(8,626,000)	$ (245,184,000)	6,066,000
Common Stock, Shares, Outstanding Period End at Dec. 31, 2013		46,750,002				1,648,613
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		0				(216,395)
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	20,470,000	$ 0	1,295,000	(12,683,000)	0	$ 31,858,000	0
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	3,020,000	0	3,020,000	0	0	0	0
Stock Repurchased During Period, Value	(264,368,000)	$ 0	0	0	0	$ (264,368,000)	0
Stock Repurchased During Period, Shares		0				1,680,800
Dividends	(89,089,000)	$ 0	0	(89,089,000)	0	$ 0	0
Treasury Stock, Retired, Cost Method, Amount	0	$ (29,000)	(4,315,000)	(155,737,000)	0	$ 160,081,000	0
Treasury Stock, Shares, Retired		(1,150,000)				(1,150,000)
Stockholders' Equity, Other	(787,000)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders		$ 0	0	0	0	$ 0	787,000
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Other Comprehensive Income (Loss), Net of Tax	3,268,000	0	0	0	(3,268,000)	0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	258,626,000	0	0	257,485,000	0	0
Net Income (Loss) Attributable to Noncontrolling Interest	1,141,000						1,141,000
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	255,358,000
Common Stock, Value, Issued Period End at Dec. 31, 2014	$ 93,993,000	$ 1,174,000	0	415,906,000	(11,894,000)	$ (317,613,000)	6,420,000
Common Stock, Shares, Outstanding Period End at Dec. 31, 2014	43,636,984	45,600,002				1,963,018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		0				(183,455)
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	$ 21,279,000	$ 0	3,267,000	(11,044,000)	0	$ 29,056,000	0
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation	(175,000)	0	(175,000)	0	0	0	0
Stock Repurchased During Period, Value	(159,709,000)	$ 0	0	0	0	$ (159,709,000)	0
Stock Repurchased During Period, Shares		0				1,444,534
Dividends	(94,235,000)	$ 0	0	(94,235,000)	0	$ 0	0
Treasury Stock, Retired, Cost Method, Amount	$ 0	$ (32,000)	(3,092,000)	(206,267,000)	0	$ 209,391,000	0
Treasury Stock, Shares, Retired	1,250,000	(1,250,000)				(1,250,000)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	$ (1,140,000)	$ 0	0	0	0	$ 0	(1,140,000)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Other Comprehensive Income (Loss), Net of Tax	(1,356,000)	0	0	0	1,356,000	0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	114,932,000	0	0	114,847,000	0	0
Net Income (Loss) Attributable to Noncontrolling Interest	85,000						85,000
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	116,288,000
Common Stock, Value, Issued Period End at Dec. 31, 2015	$ (23,699,000)	$ 1,142,000	$ 0	$ 219,207,000	$ (10,538,000)	$ (238,875,000)	$ 5,365,000
Common Stock, Shares, Outstanding Period End at Dec. 31, 2015	42,375,905	44,350,002				1,974,097

Statement of Cash Flows

Statement of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 114,932	$ 258,626	$ 243,194
Adjustments to reconcile income to net cash provided by operating activities:
Share-based Compensation	21,279	20,470	20,526
Depreciation and amortization	27,457	26,696	25,471
Debt issuance costs amortization and finance charges	702	445	480
(Increase) decrease in value of life insurance policies	909	(1,581)	(5,112)
Deferred Income Tax Expense (Benefit)	(107)	4,682	6,790
Asset Impairment Charges	5,199	0	0
Provision for Doubtful Accounts	2,592	1,243	(236)
Other Noncash Income (Expense)	(860)	(466)	473
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	49,261	3,486	(16,312)
Inventories	3,049	2,894	1,291
Prepaid expenses and other current assets	7,744	(10,088)	13,915
Other assets	2,652	680	(867)
Accounts payable	(13,353)	(3,021)	(6,339)
Accrued expenses	(9,723)	(2,611)	5,979
Other long-term liabilities	4,275	1,873	11,865
Increase (Decrease) in Deferred Revenue	3,092	121	(2,981)
Net cash provided by operating activities	219,100	303,449	298,137
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(22,797)	(36,586)	(35,416)
Patents and other intangibles	(1,460)	(854)	(3,530)
Acquisitions, net of cash acquired	(13,774)	(1,200)	0
Payments for (Proceeds from) Investments	0	0	(98)
Proceeds from sale of assets	1,320	884	1,036
Proceeds from insurance recovery	0	0	1,385
Premiums on life insurance	(2,943)	(4,310)	(6,575)
Net cash used in investing activities	(39,654)	(42,066)	(43,198)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of debt borrowings	(139,656)	(128,162)	(134,046)
Proceeds from debt borrowings	215,000	217,000	167,000
Stock options exercised	0	0	83
Excess tax benefits from stock-based payments	(175)	3,020	3,744
Debt financing costs	(387)	(1,128)	0
Non-controlling interest - dividend	(1,140)	(394)	0
Dividends paid	(94,235)	(89,089)	(58,642)
Repurchase of common shares	(159,709)	(264,368)	(227,216)
Net cash used in financing activities	(180,302)	(263,121)	(249,077)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(856)	(1,738)	5,862
Cash and Cash Equivalents, at Carrying Value	22,494	23,350	25,088
Cash payments for interest	12,313	10,272	8,869
Cash payments for income taxes	35,523	79,644	57,001
Non-cash investing and financing activities:
Financed capital expenditures	483	1,009	5,797
Insurance premium financed	$ 2,228	$ 0	$ 0

Description of Business

Description of Business	12 Months Ended
	Dec. 31, 2015
Description of Business [Abstract]
Business Description and Basis of Presentation [Text Block]	Core Laboratories N.V. ("Core Laboratories", "we", "our" or "us") is a Netherlands limited liability company. We were established in 1936 and are one of the world's leading providers of proprietary and patented reservoir description, production enhancement and reservoir management services to the oil and gas industry. These services are directed toward enabling our clients to improve reservoir performance and increase oil and gas recovery from their producing fields. We have over 70 offices in more than 50 countries and have approximately 4,400 employees. 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: (1) Reservoir Description, (2) Production Enhancement and (3) Reservoir Management. For a description of product types and services offered by these business segments, see Note 18 -

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
Summary of Significant Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	Principles of Consolidation The accompanying Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles in the U.S. ("U.S. GAAP" or "GAAP"), and include the accounts of Core Laboratories and its subsidiaries for which we have a controlling voting interest and/or a controlling financial interest. The equity method of accounting is used to record our interest in investments in which we have less than a majority interest and do not exercise control but do 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. We record non-controlling interest associated with consolidated subsidiaries that are less than 100% owned. All inter-company transactions and balances have been eliminated in consolidation. Use of Estimates The preparation of financial statements in accordance with U.S. GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. We evaluate our estimates on an ongoing basis and utilize our historical experience, as well as various other assumptions that we believe are reasonable in a given circumstance, in order to make these estimates. Actual results could differ from our estimates, as assumptions and conditions change. The following accounts, among others, require us to use critical estimates and assumptions: ▪ allowance for doubtful accounts; ▪ inventory reserves; ▪ depreciation and amortization; ▪ long-lived assets, intangibles and goodwill; ▪ income taxes; ▪ pensions and other postretirement benefits; and ▪ stock-based compensation. Accounting policies relating to these accounts and the nature of these estimates are further discussed under the applicable caption. For each of these critical estimates it is at least reasonably possible that changes in these estimates will occur in the short term which may impact our financial position or results of operations. Cash and Cash Equivalents Cash and cash equivalents include all short-term, highly liquid instruments purchased with an original maturity of three months or less. These items are carried at cost, which approximates fair value. Concentration of Credit Risk Our financial instruments that potentially subject us to concentrations of credit risk relate primarily to cash and cash equivalents and trade accounts receivable. All cash and cash equivalents are on deposit at commercial banks or investment firms with significant financial resources. Our trade receivables are with a variety of domestic, international and national oil and gas companies. We had no clients who provided more than 10% of our revenue for the years ended December 31, 2015 , 2014 and 2013 . We consider our credit risk related to trade accounts receivable to be limited due to the creditworthiness and financial resources of our clients. We evaluate our estimate of the allowance for doubtful accounts on an on-going basis throughout the year. Concentration of Interest Rate Risk We are exposed to interest rate risk on our revolving credit facility (the "Credit Facility") debt, which carries a variable interest rate. We are exposed to interest rate risk on our Senior Notes which carry a fixed interest rate, but whose fair value will fluctuate based on changes in interest rates and market perception of our credit risk. Derivative Instruments We may enter into a variety of derivative instruments in connection with the management of our exposure to fluctuations in interest rates or currency exchange rates. See Note 14 - Derivative Instruments and Hedging Activities . We do not enter into derivatives for speculative purposes. Accounts Receivable Trade accounts receivable are recorded at their invoiced amounts and do not bear interest. We perform ongoing credit evaluations of our clients and monitor collections and payments in order to maintain a provision for estimated uncollectible accounts based on our historical collection experience and our current aging of client receivables outstanding, in addition to client's representations and our understanding of the economic environment in which our clients operate. Based on our review we establish or adjust allowances for specific clients and the accounts receivable as a whole, and recognize expense. When an account is determined to be uncollectible, we charge the receivable to our allowance for doubtful accounts. Our allowance for doubtful accounts totaled $4.1 million and $3.4 million at December 31, 2015 and 2014 , respectively. The net carrying value of accounts receivable is considered to be representative of its respective fair value. Inventories Inventories consist of manufactured goods, materials and supplies used for sales or services to clients. Inventories are stated at the lower of cost or estimated net realizable value. Inventory costs are recorded at standard cost which approximates the first-in, first-out method. Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets are comprised primarily of current deferred tax assets, prepaid insurance, value added taxes and prepaid rents. Property, Plant and Equipment Property, plant and equipment are carried at cost less accumulated depreciation. Major renewals and improvements are capitalized while maintenance and repair costs are charged to expense as incurred. They are depreciated using the straight-line method based on their individual estimated useful lives, except for leasehold improvements, which are depreciated over the remaining lease term, if shorter. We estimate the useful lives and salvage values of our assets based on historical data as follows: Buildings and leasehold improvements 3 - 40 years Machinery and equipment 3 - 10 years When long-lived assets are sold or retired, the remaining costs and related accumulated depreciation are removed from the accounts and any resulting gain or loss is included in income. These capitalized long-lived assets could become impaired if our operating plans or business environment changes. We review our long-lived assets, including definite-lived intangible assets, for impairment when events or changes in circumstances indicate that their net book value may not be recovered over their remaining service lives. Indicators of possible impairment may include significant declines in activity levels in regions where specific assets or groups of assets are located, extended periods of idle use, declining revenue or cash flow or overall changes in general market conditions. Whenever possible impairment is indicated, we compare the carrying value of the assets to the sum of the estimated undiscounted future cash flows expected from use, plus salvage value, less the costs of the subsequent disposition of the assets. If impairment is still indicated, we compare the fair value of the assets to the carrying amount, and recognize an impairment loss for the amount by which the carrying value exceeds the fair value. We did not record any material impairment charges relating to our long-lived assets held for use during the years ended December 31, 2015 , 2014 or 2013 . Intangibles and Goodwill Intangible assets, including patents, trademarks, and trade names, are carried at cost less accumulated amortization. Intangibles with determinable lives are amortized using the straight-line method based on the estimated useful life of the intangible. Intangibles with indeterminable lives, which consist primarily of corporate trade names, are not amortized, but are tested for impairment annually or whenever events or changes in circumstances indicate that impairment is possible. We record goodwill as the excess of the purchase price over the fair value of the net assets acquired in acquisitions accounted for under the purchase method of accounting. We test goodwill for impairment annually, or more frequently if circumstances indicate possible impairment. We evaluated our goodwill for impairment by comparing the fair value of each of our reporting units, which are our reportable segments, to their net carrying value as of the balance sheet date. We estimated the fair value of each reporting unit using a discounted future cash flow analysis. Estimated future cash flows were based on the Company's best estimate of future performance. Our impairment analysis is quantitative; however, it includes subjective estimates based on assumptions regarding future growth rates, interest rates and operating expenses. If the carrying value of the reporting unit exceeds the fair value determined, an impairment loss is recorded to the extent that the implied fair value of the goodwill of the reporting unit is less than its carrying value. Any subsequent impairment loss could result in a material adverse effect upon our financial position and results of operations. We did not record impairment charges relating to our goodwill or our indefinite-lived intangible assets during the years ended December 31, 2015 , 2014 or 2013 . We have never identified nor recorded any impairments relating to the goodwill of our current continuing operations. Other Assets Cash surrender value of life insurance relates to postretirement benefit plans. See Note 10 - Pension and Other Postretirement Benefit Plans . Investments include unconsolidated affiliates accounted for under the equity method where the operations of these entities are in-line with those of our core businesses. These entities are not considered special purpose entities nor do we have special off-balance sheet arrangements through these entities. Other assets consisted of the following (in thousands): 2015 2014 Cash surrender value of life insurance $ 36,087 $ 36,869 Investments in unconsolidated affiliates 2,719 2,336 Other 4,801 4,304 Total other assets $ 43,607 $ 43,509 We have chosen to adopt ASU 2015-03 early for the fiscal year ended December 31, 2015. The adoption of this standard resulted in a reclassification of the debt issuance costs of $2.0 million and $2.3 million for the years ended December 31, 2015 and 2014, respectively, from Other assets to Long-term debt. Accounts Payable Trade accounts payable are recorded at their invoiced amounts and do not bear interest. The carrying value of accounts payable is considered to be representative of its respective fair value. Income Taxes We recognize deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the Consolidated Financial Statements or tax returns. Deferred tax assets and liabilities are determined based on the difference between the financial statement and the tax basis of assets and liabilities using enacted tax rates in effect for the year in which the asset is recovered or the liability is settled. We include interest and penalties from tax judgments in income tax expense. We record a liability for unrecognized tax benefits resulting from uncertain tax positions taken or expected to be taken in our tax return. We also recognize interest and penalties, if any, related to unrecognized tax benefits in income tax expense. See Note 9 - Income Taxes . Comprehensive Income Comprehensive income is comprised of net income and other charges or credits to equity that are not the result of transactions with owners. For the years ended December 31, 2015 and 2014 , other comprehensive income related to prior service costs, an unrecognized net actuarial gain and loss from a pension plan and changes in the fair value of our interest rate swaps. For the year ended December 31, 2013 , other comprehensive income related to prior service costs and an unrecognized net actuarial gain and loss from a pension plan. See Note 10 - Pension and Other Postretirement Benefit Plans and Note 14 - Derivative Instruments and Hedging Activities . Revenue Recognition We recognize revenue when we determine that the following criteria are met: (i) persuasive evidence of an arrangement exists; (ii) delivery has occurred or services have been rendered; (iii) the fee is fixed or determinable; and (iv) collectability is reasonably assured. Services Revenue : We provide a variety of services to clients in the oil and gas industry. Where services are provided related to the testing and analysis of rock and fluids, we recognize revenue upon the provision of the test results or analysis to the client. For our design, field engineering and completion diagnostic services, we recognize revenue upon the delivery of those services at the well site. In the case of our consortium studies, revenue is recognized when the reservoir model solution is presented to our clients. We conduct testing and provide analysis services in support of our consortium studies recognizing revenue as the testing and analysis results are made available to our consortium members. Product Sales Revenue : We manufacture equipment that we sell to our clients in the oil and gas well industry. Revenue is recognized when title to that equipment passes to the client, which is typically when the product is shipped to the client or picked up by the client at our facilities, as set out in the contract. All advance client payments are classified as unearned revenue until services are performed or product title is transferred. All known or anticipated losses on contracts are provided for currently. Foreign Currencies Our functional currency is the U.S. Dollar ("USD"). All inter-company financing, transactions and cash flows of our subsidiaries are transacted in USD. Our foreign entities remeasure monetary assets and liabilities to USD at year-end exchange rates, while non-monetary items are measured at historical rates. Revenue and expenses are remeasured at the applicable month-end rate, except for depreciation, amortization and certain components of cost of sales, which are measured at historical rates. For the year ended December 31, 2015 , we incurred a net remeasurement loss of approximately $4.5 million , while in the year ended December 31, 2014 , we incurred a net remeasurement loss of approximately $4.2 million , and a net remeasurement loss of approximately $4.3 million in the year ended December 31, 2013 . These amounts were included in Other (Income) Expense, net in the accompanying Consolidated Statements of Operations. Pensions and Other Postretirement Benefits We maintain 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. As required by current accounting standards, we recognize net periodic pension costs associated with this plan in income from current operations and recognize the unfunded status of the plan, if any, as a long-term liability. In addition, we recognize as a component of other comprehensive income, the gains or losses and prior service costs or credits that arise during the period but are not recognized as components of net periodic pension cost. The projection of benefit obligation and fair value of plan assets requires the use of assumptions and estimates. Actual results could differ from those estimates. See Note 10 - Pension and Other Postretirement Benefit Plans . Furthermore, we sponsor several defined contribution plans for the benefit of our employees. We expense these contributions in the period the contribution is made. Non-controlling Interests We maintain non-controlling interests in several investment ventures and disclose such interests clearly as a portion of equity separate from the parent's equity. The amount of consolidated net income attributable to these non-controlling interests must also be clearly presented on the Consolidated Statements of Operations. In addition, when a subsidiary is deconsolidated, any retained non-controlling equity investment in the former subsidiary will be initially measured at fair value and recorded as a gain or loss. Stock-Based Compensation We have two stock-based compensation plans, as described in further detail in Note 13 - Stock-Based Compensation . For new awards issued and awards modified, repurchased or canceled, the compensation expense is equal to the fair value of the award at the date of the grant and is recognized in the Consolidated Statement of Operations for those awards earned over the requisite service period of the award. Earnings Per Share We compute basic earnings per common share by dividing net income attributable to Core Laboratories N.V. by the weighted average number of common shares outstanding during the period. Diluted earnings per common and potential common share include additional shares in the weighted average share calculations associated with the incremental effect of dilutive employee stock options, 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): For the Years Ended December 31, 2015 2014 2013 Weighted average basic common shares outstanding 42,747 44,362 45,692 Effect of dilutive securities: Stock options — — 1 Performance shares 98 110 119 Restricted stock 63 128 182 Weighted average diluted common and potential common shares outstanding 42,908 44,600 45,994 Reclassifications Certain reclassifications were made to prior year amounts in order to conform to the current year's presentation. These reclassifications had no impact on reported net income or cash flows for the years ended December 31, 2014 and 2013 .

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2015
Acquisitions [Abstract]
Business Combination Disclosure [Text Block]	We continually review potential acquisitions to add key services and technologies, enhance market presence or complement existing businesses. In June 2015, we acquired a business providing additional reservoir fluids technology for $17.2 million in cash. We have accounted for this acquisition by allocating the purchase price to the net assets acquired based on their estimated fair values at the date of acquisition, resulting in an increase to goodwill of $13.7 million and an increase of $2.0 million in intangible assets. The acquisition was recorded in the Reservoir Description business segment. The acquisition of this entity did not have a material impact on our Consolidated Balance Sheet or Consolidated Statements of Operations. We had no significant acquisitions during the years ended December 31, 2014 and 2013 .

Inventories

Inventories	12 Months Ended
	Dec. 31, 2015
INVENTORIES [Abstract]
Inventory Disclosure [Text Block]	Inventories consisted of the following at December 31, 2015 and 2014 (in thousands): 2015 2014 Finished goods $ 25,778 $ 32,249 Parts and materials 12,637 9,147 Work in progress 2,491 1,975 Total inventories $ 40,906 $ 43,371 We include freight costs incurred for shipping inventory to our clients in the Cost of product sales caption in the accompanying Consolidated Statements of Operations

Property Plant and Equipment

Property Plant and Equipment	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment Disclosure [Text Block]	The components of property, plant and equipment, net were as follows at December 31, 2015 and 2014 (in thousands): 2015 2014 Land $ 7,894 $ 7,475 Building and leasehold improvements 111,740 106,838 Machinery and equipment 263,858 252,884 Total property, plant and equipment 383,492 367,197 Less - accumulated depreciation (240,281 ) (218,183 ) Property, plant and equipment, net $ 143,211 $ 149,014

Intangibles

Intangibles	12 Months Ended
	Dec. 31, 2015
Intangibles [Abstract]
Intangible Assets Disclosure [Text Block]	The components of intangibles, net as of December 31, 2015 and 2014 are as follows (in thousands): 2015 2014 Original life in years Gross Carrying Value Accumulated Amortization Gross Carrying Value Accumulated Amortization Acquired trade secrets 2-20 $ 3,065 $ 1,086 $ 1,388 $ 878 Acquired patents and trademarks 4-10 7,869 4,677 6,854 1,601 Agreements not to compete 3-5 894 586 3,849 3,492 Acquired trade names Indefinite 4,562 — 4,522 — Total intangibles, net $ 16,390 $ 6,349 $ 16,613 $ 5,971 Our estimated amortization expense relating to these intangibles for the next five years is summarized in the following table (in thousands): 2016 $ 850 2017 $ 697 2018 $ 657 2019 $ 608 2020 $ 533

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2015
Goodwill [Abstract]
Goodwill Disclosure [Text Block]	The changes in the carrying amount of goodwill for each reportable segment for the years ended December 31, 2015 , and 2014 were as follows (in thousands): Reservoir Description Production Enhancement Reservoir Management Total Balance at December 31, 2013 $ 80,932 $ 79,560 $ 2,845 $ 163,337 Goodwill acquired during the year 1,127 — — 1,127 Balance at December 31, 2014 82,059 79,560 2,845 164,464 Goodwill acquired during the year 13,695 — — 13,695 Balance at December 31, 2015 $ 95,754 $ 79,560 $ 2,845 $ 178,159

Debt and Capital Lease Obligati

Debt and Capital Lease Obligations	12 Months Ended
	Dec. 31, 2015
Debt [Abstract]
Debt and Capital Leases Disclosures [Text Block]	We have no capital lease obligations. Debt at December 31, 2015 and 2014 is summarized in the following table (in thousands): December 31, 2015 December 31, 2014 Senior Notes $ 150,000 $ 150,000 Credit Facility 283,000 206,000 Other indebtedness 2,244 — Total debt 435,244 356,000 Less: Short-term debt included in other indebtedness (2,244 ) — Less: Debt issuance costs (2,013 ) (2,328 ) Long-term debt, net $ 430,987 $ 353,672 We have chosen to adopt ASU 2015-03 early for the fiscal year ended December 31, 2015. The adoption of this standard resulted in a reclassification of the debt issuance costs of $2.0 million and $2.3 million for the years ended December 31, 2015 and 2014, respectively, from Other assets to Long-term debt. In 2011, we issued two series of senior notes with an aggregate principal amount of $150 million ("Senior Notes") 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 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 2.0% . Any outstanding balance under the Credit Facility is due August 29, 2019 , when the Credit Facility matures. Interest payment terms are variable depending upon the specific type of borrowing under this facility. Our available capacity at any point in time is subject to all terms of the agreements, and is reduced by borrowings outstanding at the time and outstanding letters of credit which totaled $25 million at December 31, 2015 , resulting in an available borrowing capacity under the Credit Facility of $92 million . In addition to those items under the Credit Facility, we had $12.3 million of outstanding letters of credit and performance guarantees and bonds from other sources as of December 31, 2015 . The terms of the Credit Facility and Senior Notes require us to meet certain covenants, including, but not limited to, an interest coverage ratio (consolidated EBITDA divided by interest expense) and a leverage ratio (consolidated net indebtedness divided by consolidated EBITDA), where consolidated EBITDA (as defined in each agreement) and interest expense are calculated using the most recent four fiscal quarters. The Credit Facility has the more restrictive covenants with a minimum interest coverage ratio of 3.0 to 1.0 and a maximum leverage ratio of 2.5 to 1.0. 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. See Note 14 - Derivative Instruments and Hedging Activities for discussion of our derivative instruments. Other indebtedness at December 31, 2015 includes approximately $2.2 million of debt incurred relating to the financing of our corporate insurance. The estimated fair value of total debt at December 31, 2015 and 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.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Taxes [Abstract]
Income Tax Disclosure [Text Block]	The components of income before income tax expense for 2015 , 2014 and 2013 are as follows (in thousands): 2015 2014 2013 United States $ 55,143 $ 154,943 $ 150,023 Other countries 93,547 180,988 174,079 Income before income tax expense $ 148,690 $ 335,931 $ 324,102 The components of income tax expense for 2015 , 2014 and 2013 are as follows (in thousands): 2015 2014 2013 Current: United States $ 17,257 $ 44,350 $ 44,112 Other countries 14,629 23,546 25,103 State and provincial 1,979 4,727 4,903 Total current 33,865 72,623 74,118 Deferred: United States (2,905 ) 2,801 4,754 Other countries 2,947 1,675 1,884 State and provincial (149 ) 206 152 Total deferred (107 ) 4,682 6,790 Income tax expense $ 33,758 $ 77,305 $ 80,908 The differences in income tax expense computed using The Netherlands statutory income tax rate of 25% , 25% and 25% in 2015 , 2014 and 2013 , respectively, and our income tax expense as reported in the accompanying Consolidated Statements of Operations for 2015 , 2014 and 2013 are as follows (in thousands): 2015 2014 2013 Tax at The Netherlands income tax rate $ 37,173 $ 83,983 $ 81,026 International earnings taxed at rates other than The Netherlands statutory rate (14,066 ) (6,721 ) (6,698 ) Non-deductible expenses 2,832 2,807 2,138 Change in valuation allowance 3,625 1,150 (1,156 ) State and provincial taxes 1,133 3,339 3,439 Adjustments of prior year taxes 483 (2,973 ) (4,258 ) Adjustments of income tax reserves (1,205 ) (1,570 ) 59 Other 3,783 (2,710 ) 6,358 Income tax expense $ 33,758 $ 77,305 $ 80,908 Deferred tax assets and liabilities result from various temporary differences between the financial statement carrying amount and their tax basis. Deferred tax assets and liabilities as of December 31, 2015 and 2014 are summarized as follows (in thousands): 2015 2014 Deferred tax assets: Net operating loss carry-forwards $ 8,045 $ 6,340 Reserves 18,627 14,135 Unrealized benefit plan loss 5,571 4,925 Unrealized foreign exchange 7,994 2,289 Other 3,229 2,232 Total deferred tax assets 43,466 29,921 Valuation allowance (1) (10,862 ) (7,236 ) Net deferred tax asset 32,604 22,685 Deferred tax liabilities: Intangibles (5,876 ) (5,650 ) Property, plant and equipment (8,372 ) (6,993 ) Accrued interest (10,111 ) (6,841 ) Unrealized foreign exchange (6,421 ) — Other (1,579 ) (3,498 ) Total deferred tax liabilities (32,359 ) (22,982 ) Net deferred income taxes $ 245 $ (297 ) 2015 2014 Current deferred tax assets $ 3,164 $ 6,130 Current deferred tax liabilities (9,731 ) (3,093 ) Long-term deferred tax assets 11,693 3,876 Long-term deferred tax liabilities (4,881 ) (7,210 ) Total deferred tax assets (liabilities) $ 245 $ (297 ) (1) Valuation allowance at 12/31/13 was $6.1 million. We have not provided for deferred taxes on the unremitted earnings of certain subsidiaries that we consider to be indefinitely reinvested. Should we make a distribution of the unremitted earnings of these subsidiaries, we may be required to record additional taxes. At December 31, 2015 , we had tax net operating loss carry-forwards in various tax jurisdictions of approximately $30.8 million . Although we cannot be certain that these operating loss carry-forwards will be utilized, we anticipate that we will have sufficient taxable income in future years to allow us to fully utilize the carry-forwards that are not subject to a valuation allowance as of December 31, 2015 . If unused, those carry-forwards which are subject to expiration may expire during the years 2016-2026 . During 2015 , $3.9 million of net operating loss carry-forwards which carried a full valuation allowance expired unused. We file income tax returns in the U.S. federal jurisdiction, various states and foreign jurisdictions. We are currently undergoing multiple examinations in various jurisdictions, and the years 1999 through 2014 remain open for examination in various tax jurisdictions in which we operate. In some of these jurisdictions we have received notices of audit assessment that could expose the Company to additional income taxes, including interest and penalty of approximately $17 million in excess of our current estimates. The ultimate settlement and timing of these additional tax assessments is uncertain but the Company will continue to vigorously defend its return filing position and does not view the assessments as probable at this time. During 2015 , adjustments were made to estimates for uncertain tax positions in certain tax jurisdictions based upon changes in facts and circumstances, resulting in a reduction to the unrecognized tax benefits. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands): 2015 2014 2013 Unrecognized tax benefits at January 1, $ 11,747 $ 12,385 $ 13,256 Tax positions, current period 1,044 1,441 1,747 Tax positions, prior period (640 ) 56 (501 ) Settlements with taxing authorities (1,371 ) (947 ) — Lapse of applicable statute of limitations (816 ) (1,188 ) (2,117 ) Unrecognized tax benefits at December 31, $ 9,964 $ 11,747 $ 12,385 Changes in our estimate of unrecognized tax benefits would affect our effective tax rate. Our policy is to record accrued interest and penalties on uncertain tax positions, net of any tax effect, as part of total tax expense for the period. The corresponding liability is carried along with the tax exposure as a non-current payable in Other Long-term Liabilities. For the years ended December 31, 2015 , 2014 and 2013 , we recognized approximately $(0.5) million , $(1.1) million and $0.9 million respectively, in interest and penalties. For the years ended December 31, 2015 , 2014 and 2013 , we had approximately $2.0 million , $2.5 million and $3.6 million , respectively, accrued for the payment of interest and penalties.

Pension and Other Postretiremen

Pension and Other Postretirement Benefit Plans	12 Months Ended
	Dec. 31, 2015
Pension and Other Postretirement Benefit Plans [Abstract]
Pension and Other Postretirement Benefits Disclosure [Text Block]	Defined Benefit Plan We provide a noncontributory defined benefit pension plan covering 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. We fund the future obligations of the Dutch Plan by purchasing insurance contracts from a large multi-national insurance company. The insurance contracts are purchased annually and re-new after five years at which time they are replaced with new contracts that are adjusted to include changes in the benefit obligation for the current year and redemption of the expired contracts. We make annual premium payments to the insurance company based on each employee's age and current salary, and the contractual growth rate. We determine the fair value of these plan assets with the assistance of an actuary using observable inputs (Level 2), which approximates the contract value of the investments. The following table summarizes the change in the projected benefit obligation and the fair value of plan assets for the years ended December 31, 2015 and 2014 (in thousands): 2015 2014 Projected Benefit Obligation: Projected benefit obligation at beginning of year $ 59,338 $ 49,456 Service cost 1,787 1,445 Interest cost 1,192 1,756 Prior service cost (credit) arising during year — (1,024 ) Benefits paid (982 ) (1,136 ) Administrative expenses (169 ) (220 ) Actuarial (gain) loss, net (4,416 ) 16,667 Unrealized (gain) loss on foreign exchange (5,991 ) (7,606 ) Projected benefit obligation at end of year $ 50,759 $ 59,338 Fair Value of Plan Assets: Fair value of plan assets at beginning of year $ 47,528 $ 39,504 Increase (decrease) in plan asset value (2,279 ) 13,572 Employer contributions 1,829 1,897 Benefits paid (982 ) (1,136 ) Administrative expenses (169 ) (220 ) Unrealized gain (loss) on foreign exchange (4,811 ) (6,089 ) Fair value of plan assets at end of year $ 41,116 $ 47,528 Under-funded status of the plan at end of the year $ (9,643 ) $ (11,810 ) Accumulated Benefit Obligation $ 43,969 $ 50,837 The following actuarial assumptions were used to determine the actuarial present value of our projected benefit obligation at December 31, 2015 and 2014 : 2015 2014 Weighted average assumed discount rate 2.60% 2.20% Weighted average rate of compensation increase 0% - 3% 0% - 3% The discount rate used to determine our projected benefit obligation at December 31, 2015 was increased from 2.20% to 2.60% , consistent with a general increase in interest rates in Europe for AAA-rated long-term Euro government bonds. Amounts recognized for the Dutch Plan in the Consolidated Balance Sheets for the years ended December 31, 2015 and 2014 consist of (in thousands): 2015 2014 Deferred tax asset $ 2,660 $ 2,953 Other long-term liabilities 9,643 11,810 Accumulated other comprehensive loss (9,540 ) (10,812 ) The components of net periodic pension cost under this plan for the years ended December 31, 2015 , 2014 , and 2013 included (in thousands): 2015 2014 2013 Service cost $ 1,787 $ 1,445 $ 1,582 Interest cost 1,192 1,756 1,676 Expected return on plan assets (986 ) (1,303 ) (1,291 ) Unrecognized pension asset, net (96 ) (87 ) (87 ) Prior service cost (85 ) 7 159 Unrecognized net actuarial loss 727 540 468 Net periodic pension cost $ 2,539 $ 2,358 $ 2,507 This net periodic pension cost was calculated using the following assumptions: 2015 2014 Weighted average assumed discount rate 2.60% 3.70% Expected long-term rate of return on plan assets 2.60% 3.30% Weighted average rate of compensation increase 3.00% 3.00% Plan assets at December 31, 2015 and 2014 consisted of insurance contracts with returns equal to the contractual rate, which are comparable with governmental debt securities. Our expected long-term rate of return assumptions are based on the weighted-average contractual rates for each contract. Dutch law dictates the minimum requirements for pension funding. Our goal is to meet these minimum funding requirements, while our insurance carrier invests to minimize risks associated with future benefit payments. Our 2016 minimum funding requirements are expected to be approximately $1.8 million . Our estimate of future annual contributions is based on current funding requirements, and we believe these contributions will be sufficient to fund the plan. Expected benefit payments to eligible participants under this plan for the next five years are as follows (in thousands): 2016 $ 1,020 2017 $ 1,148 2018 $ 1,182 2019 $ 1,201 2020 $ 1,317 Succeeding five years $ 7,877 Defined Contribution Plans We maintain defined contribution plans (the "Defined Contribution Plans") for the benefit of eligible employees in certain countries, including Canada, The Netherlands, the United Kingdom and the United States. In accordance with the terms of each plan, we and our participating employees contribute up to specified limits, and under certain plans, we may make discretionary contributions in accordance with the terms of the Defined Contribution Plans. For the years ended December 31, 2015 , 2014 and 2013 , we expensed approximately $6.9 million , $7.9 million and $7.1 million , respectively, for our contributions and our additional discretionary contributions to the Defined Contribution Plans. 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. The charge to expense for these deferred compensation contracts in 2015 , 2014 and 2013 was approximately $1.7 million , $1.9 million and $3.5 million , respectively. Life insurance policies with cash surrender values have been purchased for the purpose of funding the deferred compensation contracts. 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 (the "Deferred Compensation Plan"), due to certain limitations imposed by the U.S. Internal Revenue Code of 1986, as amended (the "Internal Revenue Code"). The Deferred Compensation Plan also provides for employer contributions to be made on behalf of participants equal in amount to certain forfeitures of, and/or reductions in, employer contributions that participants could have otherwise received under the Defined Contribution Plan for U.S. employees qualified under Internal Revenue Code Section 401(k) had there not been certain limitations imposed by the Internal Revenue Code. Employer contributions to the Deferred Compensation Plan vest ratably over a period of five years. Contributions to the plan are invested in equity and other investment fund assets within life insurance policies, and carried on the balance sheet at fair value. A participant's plan benefits include the participant's deferrals, the vested portion of the employer's contributions, and deemed investment gains and losses on such amounts. The benefits under these contracts are fully vested and payment of benefits generally commences as of the last day of the month following the termination of services except that the payment of benefits for select executives generally commences on the first working day following a six month waiting period following the date of termination. Employer contributions to the Deferred Compensation Plan were $0.3 million for each of the years ended December 31, 2015 , 2014 and 2013 . Vesting in all employer contributions is accelerated upon the death of the participant or a change in control. Employer contributions under the plans are forfeited upon a participant's termination of employment to the extent they are not vested at that time.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2015
COMMITMENTS AND CONTINGENCIES [Abstract]
Commitments and Contingencies Disclosure [Text Block]	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. A liability is accrued when a loss is both probable and can be reasonably estimated. During 2015, we recorded contingent liabilities in the amount of $8.6 million associated with these claims. In 1998, we entered into employment agreements with our three senior executive officers that provide for severance benefits. The present value of the long-term liability recorded and fully reserved for the benefits due upon severing the employment of these employees is approximately $8.4 million at December 31, 2015 . We do not maintain any off-balance sheet debt or other similar financing arrangements nor have we formed any special purpose entities for the purpose of maintaining off-balance sheet debt. Scheduled minimum rental commitments under non-cancellable operating leases at December 31, 2015 , consist of the following (in thousands): 2016 $ 15,565 2017 12,208 2018 9,390 2019 6,507 2020 4,656 Thereafter 18,659 Total commitments $ 66,985 Operating lease commitments relate primarily to rental of equipment and office space. Rental expense for operating leases, including amounts for short-term leases with nominal future rental commitments, was approximately $22.2 million , $24.1 million and $23.2 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. As reported in prior annual filings, 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 proposed that certain transfer pricing positions taken by the Company be adjusted. On October 26, 2105, Core Laboratories filed a petition with the U.S. Tax Court contesting the IRS proposed deficiencies of approximately $11 million plus interest for this two year audit period. On February 8, 2016, the judge signed and entered a stipulated decision document with the Tax Court, whereby the IRS conceded its position and agreed that the Company does not owe the amount they previously sought in their audit of the Company’s 2008 and 2009 tax years. The Tax Court's decision will be final 90 days from this date.

Equity

Equity	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	Treasury Shares In connection with our initial public offering in September 1995, our shareholders authorized our Management Board to repurchase up to 10% of our issued share capital, the maximum allowed under Dutch law at the time, for a period of 18 months. This authorization was renewed at subsequent annual or special shareholder meetings. At our annual shareholders' meeting on May 21, 2015 , our shareholders authorized an extension to repurchase up to 10% of our issued share capital through November 21, 2016 . The repurchase of shares in the open market is at the discretion of management pursuant to this shareholder authorization. From the activation of the share repurchase program on October 29, 2002 through December 31, 2015 , pursuant to shareholder approvals, we have repurchased 39,311,745 shares for an aggregate purchase price of approximately $1.6 billion , or an average price of $41.08 per share and have canceled 32,225,406 shares with an historical cost of $1.0 billion . At December 31, 2015 , we held 1,974,097 shares in treasury with the authority to repurchase 2,460,903 additional shares under our stock repurchase program. Subsequent to year-end, we have repurchased 270 shares at a total cost of approximately $28.6 thousand . At the annual meeting of shareholders on May 21, 2015 , the shareholders approved the cancellation of 1,250,000 shares of our common stock then held as treasury shares. These treasury shares were canceled on August 5, 2015 , after the expiration of the waiting period required under Dutch law. In accordance with FASB Accounting Standards Codification ("ASC") 505-30-30-8, we charged the excess of the cost of the treasury stock over its par value to additional paid-in capital and retained earnings. Dividend Policy In February, May, August and November 2015 , we paid quarterly dividends of $0.55 per share of common stock. The total dividends paid in 2015 were $94.2 million . On January 11, 2016 , we declared a quarterly dividend of $0.55 per share of common stock payable February 19, 2016 to shareholders of record on January 22, 2016 . Accumulated Other Comprehensive Income (Loss) Amounts recognized, net of tax, in Accumulated other comprehensive income (loss) for the years ended December 31, 2015 and 2014 consist of (in thousands): 2015 2014 Prior service cost $ 661 $ 718 Transition asset — 65 Unrecognized net actuarial loss and foreign exchange (10,201 ) (11,595 ) Fair value of derivatives, net of tax (998 ) (1,082 ) Total Accumulated other comprehensive loss, net of tax $ (10,538 ) $ (11,894 ) Unrecognized amounts currently recorded to Accumulated other comprehensive income (loss) that are expected to be recognized as components of next year's net pension benefit cost include $0.1 million for the amortization of the transition asset and $(0.6) million of unrecognized net actuarial loss.

Stock-based Compensation

Stock-based Compensation	12 Months Ended
	Dec. 31, 2015
Stock-based Compensation [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	We have granted restricted stock awards under two stock incentive plans: the 2014 Long-Term Incentive Plan and the 2014 Nonemployee Director Stock Incentive Plan. Awards under the following two compensation programs have been granted pursuant to both plans: (1) the Performance Share Award Program ("PSAP") and (2) the Restricted Share Award Program ("RSAP") and the Restricted Share Award Program for Nonemployee Directors (the "Program"). We issue shares from either treasury stock or authorized shares upon the lapsing of vesting restrictions on restricted stock. In 2015 , we issued 183,455 shares out of treasury stock relating to the vesting of restricted stock. We do not use cash to settle equity instruments issued under stock-based compensation awards. 2014 Long-Term Incentive Plan On May 13, 2014, the 2007 Long-Term Incentive Plan was amended, restated and renamed as the 2014 Long-Term Incentive Plan (the "Plan"). The primary changes effected by the 2014 amendment and restatement were to (a) extend the period during which awards may be granted under the Plan to May 12, 2024, and (b) increase the number of common shares subject to the Plan by 1,100,000 shares. The Plan, as amended, provides for a maximum of 11,900,000 common shares to be granted to eligible employees. At December 31, 2015 , approximately 1,385,624 shares remained available for the grant of new awards under the Plan. Specifically, we encourage share ownership by awarding various long-term equity incentive awards under the Plan, consisting of the PSAP and RSAP. We believe that widespread common share ownership by key employees is an important means of encouraging superior performance and employee retention. Additionally, our equity-based compensation programs encourage performance and retention by providing additional incentives for executives to further our growth, development and financial success over a longer time horizon by personally benefiting through the ownership of our common shares and/or rights. Performance Share Award Program On February 13, 2013 , certain executives were awarded rights to receive an aggregate of 79,660 common shares if our calculated return on invested capital ("ROIC"), as defined in the PSAP, is in the top decile of the Bloomberg Comp Group at the end of the three year performance period, which ended on December 31, 2015. This arrangement was recorded as an equity award that required us to recognize compensation expense totaling $9.5 million over the performance period that began on January 1, 2013 , of which $3.2 million , $2.9 million and $3.4 million has been recognized in 2015 , 2014 , and 2013 , respectively. At December 31, 2015 , the Company had the highest ROIC compared to the Bloomberg Comp Group. The Compensation Committee of our Board of Supervisory Directors verified that the performance target criteria had been met and 73,660 shares vested (6,000 shares were forfeited by participants prior to the end of the performance period). We issued these common shares on December 31, 2015 and, simultaneously, the participants surrendered 25,162 common shares to settle any personal tax liabilities which may result from the award, as permitted by the agreement. We recorded these surrendered shares as treasury stock with an aggregate cost of $2.7 million at $108.74 per share. We have recognized an additional tax liability from the vesting of the PSAP of $0.4 million in 2015. On February 13, 2014 , certain executives were awarded rights to receive an aggregate of 53,548 common shares if our calculated ROIC, as defined in the PSAP, is in the top decile of the Bloomberg Comp Group at the end of the performance period, which ends on the last trading day of 2016 , December 30, 2016 . Unless there is a change in control as defined in the PSAP, none of these awards will vest if the specified performance target is not met as of the last day of the performance period. This arrangement is recorded as an equity award that requires us to recognize compensation expense totaling $9.0 million over the performance period that began on January 1, 2014 , of which $3.0 million and $3.0 million has been recognized in 2015 and 2014 , respectively. The unrecognized compensation expense is expected to be recognized over an estimated amortization period of 12 months. On February 10, 2015 , certain executives were awarded rights to receive an aggregate of 106,455 common shares if our calculated ROIC, as defined in the PSAP, is in the top decile of the Bloomberg Comp Group at the end of the performance period, which ends on the last trading day of 2017 , December 29, 2017 . Unless there is a change in control as defined in the PSAP, none of these awards will vest if the specified performance target is not met as of the last day of the performance period. This arrangement is recorded as an equity award that requires us to recognize compensation expense totaling $11.3 million over the performance period that began on January 1, 2015 , of which $3.8 million has been recognized in 2015 . The unrecognized compensation expense is expected to be recognized over an estimated amortization period of 24 months. Restricted Share Award Program In 2004, the Compensation Committee of our Board of Supervisory Directors approved the RSAP to attract and retain the best employees, and to better align employee interests with those of our shareholders. Under this arrangement we awarded grants totaling 91,784 shares, 80,983 shares, and 94,620 shares in 2015 , 2014 , and 2013 , respectively. Each of these grants has a vesting period of principally six years and vests ratably on an annual basis. There are no performance accelerators for early vesting for these awards. Awards under the RSAP are classified as equity awards and recorded at the grant-date fair value with the compensation expense recognized over the expected life of the award. As of December 31, 2015 , there was $30.0 million of unrecognized total stock-based compensation relating to non-vested RSAP awards. The unrecognized compensation expense is expected to be recognized over an estimated weighted-average amortization period of 45 months. The grant-date fair value of shares granted was $8.9 million , $15.0 million and $12.3 million in 2015 , 2014 and 2013 , respectively and we have recognized compensation expense of $10.4 million , $10.5 million and $10.3 million in 2015 , 2014 and 2013 , respectively. The total grant-date fair value, which is the intrinsic value of the shares, vested was $10.4 million , $10.4 million and $9.9 million in 2015 , 2014 and 2013 , respectively. We have recognized a tax benefit from the vesting of the RSAP of $0.2 million , $2.9 million and $3.0 million in 2015 , 2014 and 2013 , respectively. 2014 Nonemployee Director Stock Incentive Plan On May 13, 2014, the 2006 Nonemployee Director Stock Option Plan was amended, restated and renamed as the 2014 Nonemployee Director Stock Incentive Plan (the "Director Plan"). The primary change effected by the 2014 amendment was to extend the period during which awards may be granted under the Director Plan to May 12, 2024. The Director Plan provides common shares for grant to our eligible Supervisory Directors. The maximum number of shares available for award under this plan is 1,400,000 common shares. As of December 31, 2015 approximately 558,139 shares remained available for issuance under the Director Plan. Only non-employee Supervisory Directors are eligible for these equity-based awards under the Director Plan. In 2011, the Compensation Committee of our Board of Supervisory Directors approved the restricted share award program (the "Program") to compensate our non-employee Supervisory Directors. Under this arrangement we awarded grants totaling 8,616 shares, 4,536 shares and 7,616 shares in 2015 , 2014 , and 2013 , respectively. Each of these grants has a vesting period of 3 years. There are no performance accelerators for early vesting for these awards. Awards under the Program are classified as equity awards and recorded at the grant-date fair value with compensation expense recognized over the expected life of the award. As of December 31, 2015 , there was $1.1 million of unrecognized total stock-based compensation relating to non-vested Program awards. The unrecognized compensation expense is expected to be recognized over an estimated weighted-average amortization period of 21 months. The grant-date fair value of shares granted was $0.9 million , $0.9 million and $1.0 million in 2015 , 2014 , and 2013 , respectively, and we have recognized compensation expense of $0.9 million , $0.9 million and $0.7 million in 2015 , 2014 , and 2013 , respectively. Stock-based Compensation Non-vested restricted share awards outstanding under both the Plan and the Director Plan as of December 31, 2015 and changes during the year were as follows: Number of Shares Weighted Average Grant Date Fair Value per Share Non-vested at December 31, 2014 469,321 $ 132.33 Granted 206,855 101.87 Vested (183,455 ) 113.31 Forfeited (29,117 ) 126.09 Non-vested at December 31, 2015 463,604 $ 126.65 For the years ended December 31, 2015 , 2014 and 2013 , stock-based compensation expense under both the Plan and the Director Plan recognized in the income statement is as follows (in thousands): 2015 2014 2013 Cost of product sales and services $ 10,126 $ 10,331 $ 10,268 General and administrative 11,153 10,139 10,258 Total stock-based compensation expense $ 21,279 $ 20,470 $ 20,526

Derivative Instruments (Notes)

Derivative Instruments (Notes)	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	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 Series A of our Senior Notes bears interest at a fixed rate of 4.01% and Series B bears interest at a fixed rate of 4.11% . 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 LIBOR portion of the interest rate at 1.73% through August 29, 2019 , and under the second swap agreement of $25 million , we have fixed the LIBOR portion of the interest rate at 2.50% 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 losses are deferred to shareholders' equity as a component of accumulated other comprehensive loss (AOCL) and are recognized in income as an increase to interest expense in the period in which the related cash flows being hedged are recognized in expense. At December 31, 2015 , we had fixed rate debt aggregating $200 million and variable rate debt aggregating $233 million , after taking into account the effect of the swaps. The fair values of outstanding derivative instruments are as follows: Fair Value of Derivatives December 31, 2015 December 31, 2014 Balance Sheet Classification Derivatives designated as hedges: 5 yr Interest Rate Swap $ 353 $ 201 Other Liabilities 10 yr Interest Rate Swap 1,229 881 Other Liabilities $ 1,582 $ 1,082 The fair value of all outstanding derivatives was determined using a model with inputs that are observable in the market 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: December 31, 2015 December 31, 2014 Income Statement Classification Derivatives designated as hedges: 5 yr Interest Rate Swap $ 388 $ 100 Interest Expense 10 yr Interest Rate Swap 583 145 Interest Expense $ 971 $ 245

Financial Instruments (Notes)

Financial Instruments (Notes)	12 Months Ended
	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Disclosures [Text Block]	The Company's only financial assets and liabilities which are measured at fair value on a recurring basis 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 at quoted prices in an active market (Level 1) and certain assets and liabilities 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 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 Expenses in the Consolidated Statement 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 December 31, 2015 Total Level 1 Level 2 Level 3 Assets: Deferred compensation trust assets (1) $ 23,737 $ — $ 23,737 $ — Liabilities: Deferred compensation plan $ 29,155 $ — $ 29,155 $ — 5 year interest rate swap 353 — 353 — 10 year interest rate swap 1,229 — 1,229 — $ 30,737 $ — $ 30,737 $ — 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 and are intended to fund the deferred compensation agreements.

Other (Income) Expense

Other (Income) Expense	12 Months Ended
	Dec. 31, 2015
Other (Income) Expense, net [Abstract]
Other Income and Other Expense Disclosure [Text Block]	The components of other (income) expense, net, are as follows (in thousands): For the Years Ended December 31, 2015 2014 2013 Sale of assets $ (408 ) $ (764 ) $ (909 ) Results of non-consolidated subsidiaries (383 ) (364 ) (177 ) Foreign exchange 4,507 4,230 4,339 Interest income (56 ) (403 ) (776 ) Rents and royalties (484 ) (817 ) (863 ) Insurance and other settlements — (292 ) (1,611 ) Other, net 493 (521 ) (341 ) Total other (income) expense, net $ 3,669 $ 1,069 $ (338 ) We incurred property losses due to Hurricane Isaac in 2012. During 2013, our insurance claim for property losses and business interruption was fully settled for $1.6 million . Foreign Currency Risk We operate in a number of international areas which exposes us to foreign currency exchange rate risk. We do not currently hold or issue forward exchange contracts or other derivative instruments for hedging or speculative purposes (a foreign exchange contract is an agreement to exchange different currencies at a given date and at a specified rate). Foreign exchange gains and losses are the result of fluctuations in the USD against foreign currencies and are included in other (income) expense, net in the Consolidated Statements of Operations. We recognized foreign exchange losses in countries where the USD weakened against the local currency and we had net monetary liabilities denominated in the local currency; as well as countries where the USD strengthened against the local currency and we had net monetary assets denominated in the local currency. We recognized foreign exchange gains in countries where the USD strengthened against the local currency and we had net monetary liabilities denominated in the local currency and in countries where the USD weakened against the local currency and we had net monetary assets denominated in the local currency. Foreign exchange gains and losses are summarized in the following table (in thousands): For the Years Ended December 31, (Gains) losses by currency 2015 2014 2013 Australian Dollar $ 238 $ 289 $ 432 British Pound 434 1,132 (49 ) Canadian Dollar 1,848 1,886 1,456 Euro (908 ) (1,537 ) 848 Malaysian Ringgit 545 278 421 Mexican Peso 414 284 156 Nigerian Naira 630 432 94 Other currencies, net 1,306 1,466 981 Total (gain) loss, net $ 4,507 $ 4,230 4,339

Severance and Other Charges Sev

Severance and Other Charges Severance and Other Charges (Notes)	12 Months Ended
	Dec. 31, 2015
Severance and Other Charges [Line Items]
Severance and Other Charges [Text Block]	In 2015, in response to lower commodity pricing for crude oil and reduced spending by our clients on their oil and gas fields, we reduced our cost structure, primarily through a reduction in our workforce, to better align with the decreasing activity levels into the foreseeable future. As a result of these cost reductions, we recorded severance charges of $8.8 million , of which approximately $3.6 million were accrued and remaining to be paid at December 31, 2015. Additionally, the Company recorded a charge to income associated with the impairment of certain equipment and intangible assets and facility exit costs of $5.5 million . During 2015, we recorded loss contingencies for various ongoing legal issues of $8.6 million . See Note 11 - Commitments and Contingencies .

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Segment Reporting Disclosure [Text Block]	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: (1) Reservoir Description, (2) Production Enhancement and (3) Reservoir Management. These business segments provide different services and products and utilize different technologies. • 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 business segments are presented below. We use the same accounting policies to prepare our business segment results as are used to prepare our Consolidated Financial Statements. All interest and other non-operating income (expense) is attributable to Corporate & Other area and is not allocated to specific business 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 December 31, 2015 Revenues from unaffiliated clients $ 473,372 $ 267,224 $ 56,924 $ — $ 797,520 Inter-segment revenues 8,674 1,837 248 (10,759 ) — Segment operating income (loss) 111,032 35,027 15,655 (644 ) 161,070 Total assets (at end of period) 326,182 210,214 27,076 61,786 625,258 Capital expenditures 17,849 3,292 273 1,383 22,797 Depreciation and amortization 16,778 6,611 1,624 2,444 27,457 December 31, 2014 Revenues from unaffiliated clients $ 518,974 $ 467,577 $ 98,671 $ — $ 1,085,222 Inter-segment revenue 10,387 2,459 366 (13,212 ) — Segment operating income (loss) 143,624 165,204 37,220 483 346,531 Total assets (at end of period) 319,325 257,135 34,179 62,686 673,325 Capital expenditures 21,371 7,990 2,681 4,544 36,586 Depreciation and amortization 15,816 7,509 1,393 1,978 26,696 December 31, 2013 Revenue from unaffiliated clients $ 522,251 $ 452,415 $ 98,842 $ — $ 1,073,508 Inter-segment revenue 3,432 3,140 1,742 (8,314 ) — Segment operating income (loss) 146,338 154,715 31,555 811 333,419 Total assets (at end of period) 321,106 255,764 37,660 44,834 659,364 Capital expenditures 22,601 7,124 1,366 4,325 35,416 Depreciation and amortization 14,898 7,745 945 1,883 25,471 (1) "Corporate and other" represents those items that are not directly relating to a particular segment and eliminations. We are a Netherlands company and we derive our revenue from services and product sales to clients primarily in the oil and gas industry. No single client accounted for 10% or more of revenue in any of the periods presented. Prior to 2014, we attributed revenue to the country in which the revenue was recorded. During 2014, we began attributing sales revenue to the country where the product was shipped as we feel this gives a clearer view of our operations. We do, however, have significant levels of revenue recorded in the U.S., where the services were performed, that are sourced from projects on non-U.S. oilfields. The following table shows a summary of our U.S. and non-U.S. operations (with 2013 revenue reclassified as described above) for December 31, 2015 , 2014 and 2013 (in thousands): GEOGRAPHIC INFORMATION United States Canada Other Countries (1) (2) Consolidated December 31, 2015 Revenue $ 338,907 $ 43,808 $ 414,805 $ 797,520 Property, plant and equipment, net 80,603 12,082 50,526 143,211 December 31, 2014 Revenue $ 515,643 $ 105,244 $ 464,335 $ 1,085,222 Property, plant and equipment, net 83,748 16,057 49,209 149,014 December 31, 2013 Revenue $ 487,252 $ 107,842 $ 478,414 $ 1,073,508 Property, plant and equipment, net 73,870 17,195 47,759 138,824 (1) Revenue earned in other countries, including The Netherlands, was not individually greater than 10% of our consolidated revenue in 2015, 2014 or 2013. (2) Property, plant and equipment, net in other countries, including The Netherlands, were not individually greater than 10% of our consolidated fixed assets in 2015, 2014 or 2013. The following table shows the breakdown between services and product sales for the years ended December 31, 2015 , 2014 and 2013 (in thousands): SEGMENT BREAKDOWN BETWEEN SERVICES / PRODUCT SALES For the Years Ended December 31, 2015 2014 2013 Reservoir Description Services $ 445,729 $ 495,658 $ 493,402 Production Enhancement Services 121,675 220,177 209,770 Reservoir Management Services 44,550 65,037 62,256 Total Revenue - Services $ 611,954 $ 780,872 $ 765,428 Reservoir Description Product sales $ 27,643 $ 23,316 $ 28,849 Production Enhancement Product sales 145,549 247,400 242,645 Reservoir Management Product sales 12,374 33,634 36,586 Total Revenue - Product sales $ 185,566 $ 304,350 $ 308,080 Total Revenue $ 797,520 $ 1,085,222 $ 1,073,508

Unaudited Selected Quarterly Re

Unaudited Selected Quarterly Results of Operations	12 Months Ended
	Dec. 31, 2015
Unaudited Selected Quarterly Results of Operations [Abstract]
Quarterly Financial Information [Text Block]	Summarized below is our unaudited quarterly financial data for the quarters ended December 31, 2015 and 2014 (in thousands, except per share data): Quarter ended 2015 December 31 September 30 June 30 March 31 Services and product sales revenue $ 182,723 $ 197,265 $ 203,889 $ 213,643 Cost of services and product sales 124,709 129,050 134,619 144,274 Other operating expenses 34,372 21,397 21,377 26,652 Operating income 23,642 46,818 47,893 42,717 Interest expense 3,390 3,471 3,116 2,403 Income before income tax expense 20,252 43,347 44,777 40,314 Income tax expense 4,658 9,753 10,075 9,272 Net income 15,594 33,594 34,702 31,042 Net income (loss) attributable to non-controlling interest 176 190 76 (357 ) Net income attributable to Core Laboratories N.V. $ 15,418 $ 33,404 $ 34,626 $ 31,399 Per share information: Basic earnings per share (1) $ 0.36 $ 0.79 $ 0.81 $ 0.72 Diluted earnings per share (1) $ 0.36 $ 0.78 $ 0.81 $ 0.72 Weighted average common shares outstanding: Basic 42,355 42,517 42,790 43,340 Diluted 42,518 42,685 42,959 43,466 Quarter ended 2014 December 31 September 30 June 30 March 31 Services and product sales revenue $ 278,622 $ 276,135 $ 267,562 $ 262,903 Cost of services and product sales 168,517 166,927 168,158 161,669 Other operating expenses 19,655 20,088 15,270 18,407 Operating income 90,450 89,120 84,134 82,827 Interest expense 2,882 2,561 2,794 2,363 Income before income tax expense 87,568 86,559 81,340 80,464 Income tax expense 20,841 19,909 17,244 19,311 Net income 66,727 66,650 64,096 61,153 Net income attributable to non-controlling interest 537 153 362 89 Net income attributable to Core Laboratories N.V. $ 66,190 $ 66,497 $ 63,734 $ 61,064 Per share information: Basic earnings per share (1) $ 1.51 $ 1.51 $ 1.43 $ 1.36 Diluted earnings per share (1) $ 1.51 $ 1.50 $ 1.42 $ 1.35 Weighted average common shares outstanding: Basic 43,742 44,152 44,660 44,908 Diluted 43,927 44,381 44,910 45,182 (1) The sum of the individual quarterly earnings per share amounts may not agree with the year-to-date earnings per share amounts as each quarterly computation is based on the weighted average number of common shares outstanding during that period.

Significant Accounting Polici27

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
Concentration of interest rate risk [Line Items]
Prior Period Reclassification Adjustment, Description	Reclassifications Certain reclassifications were made to prior year amounts in order to conform to the current year's presentation. These reclassifications had no impact on reported net income or cash flows for the years ended December 31, 2014 and 2013 .
Accounts payable [Policy Text Block]	Accounts Payable Trade accounts payable are recorded at their invoiced amounts and do not bear interest. The carrying value of accounts payable is considered to be representative of its respective fair value.
Pension and Other Postretirement Plans, Policy [Policy Text Block]	Pensions and Other Postretirement Benefits We maintain 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. As required by current accounting standards, we recognize net periodic pension costs associated with this plan in income from current operations and recognize the unfunded status of the plan, if any, as a long-term liability. In addition, we recognize as a component of other comprehensive income, the gains or losses and prior service costs or credits that arise during the period but are not recognized as components of net periodic pension cost. The projection of benefit obligation and fair value of plan assets requires the use of assumptions and estimates. Actual results could differ from those estimates. See Note 10 - Pension and Other Postretirement Benefit Plans . Furthermore, we sponsor several defined contribution plans for the benefit of our employees. We expense these contributions in the period the contribution is made.
NonControlling Interests [Policy Text Block]	Non-controlling Interests We maintain non-controlling interests in several investment ventures and disclose such interests clearly as a portion of equity separate from the parent's equity. The amount of consolidated net income attributable to these non-controlling interests must also be clearly presented on the Consolidated Statements of Operations. In addition, when a subsidiary is deconsolidated, any retained non-controlling equity investment in the former subsidiary will be initially measured at fair value and recorded as a gain or loss.
Income Tax, Policy [Policy Text Block]	Income Taxes We recognize deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the Consolidated Financial Statements or tax returns. Deferred tax assets and liabilities are determined based on the difference between the financial statement and the tax basis of assets and liabilities using enacted tax rates in effect for the year in which the asset is recovered or the liability is settled. We include interest and penalties from tax judgments in income tax expense. We record a liability for unrecognized tax benefits resulting from uncertain tax positions taken or expected to be taken in our tax return. We also recognize interest and penalties, if any, related to unrecognized tax benefits in income tax expense. See Note 9 - Income Taxes .
Comprehensive Income [Policy Text Block]	Comprehensive Income Comprehensive income is comprised of net income and other charges or credits to equity that are not the result of transactions with owners. For the years ended December 31, 2015 and 2014 , other comprehensive income related to prior service costs, an unrecognized net actuarial gain and loss from a pension plan and changes in the fair value of our interest rate swaps. For the year ended December 31, 2013 , other comprehensive income related to prior service costs and an unrecognized net actuarial gain and loss from a pension plan. See Note 10 - Pension and Other Postretirement Benefit Plans and Note 14 - Derivative Instruments and Hedging Activities .
Inventory, Policy [Policy Text Block]	Inventories Inventories consist of manufactured goods, materials and supplies used for sales or services to clients. Inventories are stated at the lower of cost or estimated net realizable value. Inventory costs are recorded at standard cost which approximates the first-in, first-out method.
Prepaid Expenses and Other Current Assets [Policy Text Block]	Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets are comprised primarily of current deferred tax assets, prepaid insurance, value added taxes and prepaid rents.
Consolidation, Policy [Policy Text Block]	Principles of Consolidation The accompanying Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles in the U.S. ("U.S. GAAP" or "GAAP"), and include the accounts of Core Laboratories and its subsidiaries for which we have a controlling voting interest and/or a controlling financial interest. The equity method of accounting is used to record our interest in investments in which we have less than a majority interest and do not exercise control but do 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. We record non-controlling interest associated with consolidated subsidiaries that are less than 100% owned. All inter-company transactions and balances have been eliminated in consolidation.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates The preparation of financial statements in accordance with U.S. GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. We evaluate our estimates on an ongoing basis and utilize our historical experience, as well as various other assumptions that we believe are reasonable in a given circumstance, in order to make these estimates. Actual results could differ from our estimates, as assumptions and conditions change. The following accounts, among others, require us to use critical estimates and assumptions: ▪ allowance for doubtful accounts; ▪ inventory reserves; ▪ depreciation and amortization; ▪ long-lived assets, intangibles and goodwill; ▪ income taxes; ▪ pensions and other postretirement benefits; and ▪ stock-based compensation. Accounting policies relating to these accounts and the nature of these estimates are further discussed under the applicable caption. For each of these critical estimates it is at least reasonably possible that changes in these estimates will occur in the short term which may impact our financial position or results of operations.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents Cash and cash equivalents include all short-term, highly liquid instruments purchased with an original maturity of three months or less. These items are carried at cost, which approximates fair value.
Concentration of Credit Risk [Policy Text Block]	Concentration of Credit Risk Our financial instruments that potentially subject us to concentrations of credit risk relate primarily to cash and cash equivalents and trade accounts receivable. All cash and cash equivalents are on deposit at commercial banks or investment firms with significant financial resources. Our trade receivables are with a variety of domestic, international and national oil and gas companies. We had no clients who provided more than 10% of our revenue for the years ended December 31, 2015 , 2014 and 2013 . We consider our credit risk related to trade accounts receivable to be limited due to the creditworthiness and financial resources of our clients. We evaluate our estimate of the allowance for doubtful accounts on an on-going basis throughout the year.
Concentration of Interest Rate Risk [Policy Text Block]	Concentration of Interest Rate Risk We are exposed to interest rate risk on our revolving credit facility (the "Credit Facility") debt, which carries a variable interest rate. We are exposed to interest rate risk on our Senior Notes which carry a fixed interest rate, but whose fair value will fluctuate based on changes in interest rates and market perception of our credit risk.
Trade and Other Accounts Receivable, Policy [Policy Text Block]	Accounts Receivable Trade accounts receivable are recorded at their invoiced amounts and do not bear interest. We perform ongoing credit evaluations of our clients and monitor collections and payments in order to maintain a provision for estimated uncollectible accounts based on our historical collection experience and our current aging of client receivables outstanding, in addition to client's representations and our understanding of the economic environment in which our clients operate. Based on our review we establish or adjust allowances for specific clients and the accounts receivable as a whole, and recognize expense. When an account is determined to be uncollectible, we charge the receivable to our allowance for doubtful accounts. Our allowance for doubtful accounts totaled $4.1 million and $3.4 million at December 31, 2015 and 2014 , respectively. The net carrying value of accounts receivable is considered to be representative of its respective fair value.
Property, Plant and Equipment, Policy [Policy Text Block]	Property, Plant and Equipment Property, plant and equipment are carried at cost less accumulated depreciation. Major renewals and improvements are capitalized while maintenance and repair costs are charged to expense as incurred. They are depreciated using the straight-line method based on their individual estimated useful lives, except for leasehold improvements, which are depreciated over the remaining lease term, if shorter. We estimate the useful lives and salvage values of our assets based on historical data as follows: Buildings and leasehold improvements 3 - 40 years Machinery and equipment 3 - 10 years When long-lived assets are sold or retired, the remaining costs and related accumulated depreciation are removed from the accounts and any resulting gain or loss is included in income. These capitalized long-lived assets could become impaired if our operating plans or business environment changes. We review our long-lived assets, including definite-lived intangible assets, for impairment when events or changes in circumstances indicate that their net book value may not be recovered over their remaining service lives. Indicators of possible impairment may include significant declines in activity levels in regions where specific assets or groups of assets are located, extended periods of idle use, declining revenue or cash flow or overall changes in general market conditions. Whenever possible impairment is indicated, we compare the carrying value of the assets to the sum of the estimated undiscounted future cash flows expected from use, plus salvage value, less the costs of the subsequent disposition of the assets. If impairment is still indicated, we compare the fair value of the assets to the carrying amount, and recognize an impairment loss for the amount by which the carrying value exceeds the fair value. We did not record any material impairment charges relating to our long-lived assets held for use during the years ended December 31, 2015 , 2014 or 2013 .
Goodwill and Intangible Assets, Policy [Policy Text Block]	Intangibles and Goodwill Intangible assets, including patents, trademarks, and trade names, are carried at cost less accumulated amortization. Intangibles with determinable lives are amortized using the straight-line method based on the estimated useful life of the intangible. Intangibles with indeterminable lives, which consist primarily of corporate trade names, are not amortized, but are tested for impairment annually or whenever events or changes in circumstances indicate that impairment is possible. We record goodwill as the excess of the purchase price over the fair value of the net assets acquired in acquisitions accounted for under the purchase method of accounting. We test goodwill for impairment annually, or more frequently if circumstances indicate possible impairment. We evaluated our goodwill for impairment by comparing the fair value of each of our reporting units, which are our reportable segments, to their net carrying value as of the balance sheet date. We estimated the fair value of each reporting unit using a discounted future cash flow analysis. Estimated future cash flows were based on the Company's best estimate of future performance. Our impairment analysis is quantitative; however, it includes subjective estimates based on assumptions regarding future growth rates, interest rates and operating expenses. If the carrying value of the reporting unit exceeds the fair value determined, an impairment loss is recorded to the extent that the implied fair value of the goodwill of the reporting unit is less than its carrying value. Any subsequent impairment loss could result in a material adverse effect upon our financial position and results of operations. We did not record impairment charges relating to our goodwill or our indefinite-lived intangible assets during the years ended December 31, 2015 , 2014 or 2013 . We have never identified nor recorded any impairments relating to the goodwill of our current continuing operations.
Revenue Recognition, Policy [Policy Text Block]	Revenue Recognition We recognize revenue when we determine that the following criteria are met: (i) persuasive evidence of an arrangement exists; (ii) delivery has occurred or services have been rendered; (iii) the fee is fixed or determinable; and (iv) collectability is reasonably assured. Services Revenue : We provide a variety of services to clients in the oil and gas industry. Where services are provided related to the testing and analysis of rock and fluids, we recognize revenue upon the provision of the test results or analysis to the client. For our design, field engineering and completion diagnostic services, we recognize revenue upon the delivery of those services at the well site. In the case of our consortium studies, revenue is recognized when the reservoir model solution is presented to our clients. We conduct testing and provide analysis services in support of our consortium studies recognizing revenue as the testing and analysis results are made available to our consortium members. Product Sales Revenue : We manufacture equipment that we sell to our clients in the oil and gas well industry. Revenue is recognized when title to that equipment passes to the client, which is typically when the product is shipped to the client or picked up by the client at our facilities, as set out in the contract. All advance client payments are classified as unearned revenue until services are performed or product title is transferred. All known or anticipated losses on contracts are provided for currently.
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Foreign Currencies Our functional currency is the U.S. Dollar ("USD"). All inter-company financing, transactions and cash flows of our subsidiaries are transacted in USD. Our foreign entities remeasure monetary assets and liabilities to USD at year-end exchange rates, while non-monetary items are measured at historical rates. Revenue and expenses are remeasured at the applicable month-end rate, except for depreciation, amortization and certain components of cost of sales, which are measured at historical rates. For the year ended December 31, 2015 , we incurred a net remeasurement loss of approximately $4.5 million , while in the year ended December 31, 2014 , we incurred a net remeasurement loss of approximately $4.2 million , and a net remeasurement loss of approximately $4.3 million in the year ended December 31, 2013 . These amounts were included in Other (Income) Expense, net in the accompanying Consolidated Statements of Operations.
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	Stock-Based Compensation We have two stock-based compensation plans, as described in further detail in Note 13 - Stock-Based Compensation . For new awards issued and awards modified, repurchased or canceled, the compensation expense is equal to the fair value of the award at the date of the grant and is recognized in the Consolidated Statement of Operations for those awards earned over the requisite service period of the award.
Earnings Per Share, Policy [Policy Text Block]	Earnings Per Share We compute basic earnings per common share by dividing net income attributable to Core Laboratories N.V. by the weighted average number of common shares outstanding during the period. Diluted earnings per common and potential common share include additional shares in the weighted average share calculations associated with the incremental effect of dilutive employee stock options, 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): For the Years Ended December 31, 2015 2014 2013 Weighted average basic common shares outstanding 42,747 44,362 45,692 Effect of dilutive securities: Stock options — — 1 Performance shares 98 110 119 Restricted stock 63 128 182 Weighted average diluted common and potential common shares outstanding 42,908 44,600 45,994
Other assets [Policy Text Block]	Other Assets Cash surrender value of life insurance relates to postretirement benefit plans. See Note 10 - Pension and Other Postretirement Benefit Plans . Investments include unconsolidated affiliates accounted for under the equity method where the operations of these entities are in-line with those of our core businesses. These entities are not considered special purpose entities nor do we have special off-balance sheet arrangements through these entities. Other assets consisted of the following (in thousands): 2015 2014 Cash surrender value of life insurance $ 36,087 $ 36,869 Investments in unconsolidated affiliates 2,719 2,336 Other 4,801 4,304 Total other assets $ 43,607 $ 43,509

Significant Accounting Polici28

Significant Accounting Policies Derivative Instruments Policy (Policies)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Derivatives, Policy [Policy Text Block]	Derivative Instruments We may enter into a variety of derivative instruments in connection with the management of our exposure to fluctuations in interest rates or currency exchange rates. See Note 14 - Derivative Instruments and Hedging Activities . We do not enter into derivatives for speculative purposes.

Significant Accounting Polici29

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2015
Summary of Significant Accounting Policies [Abstract]
Schedule of Other Assets [Table Text Block]	Other assets consisted of the following (in thousands): 2015 2014 Cash surrender value of life insurance $ 36,087 $ 36,869 Investments in unconsolidated affiliates 2,719 2,336 Other 4,801 4,304 Total other assets $ 43,607 $ 43,509
Schedule of Weighted Average Number of Shares [Table Text Block]	The following table summarizes the calculation of weighted average common shares outstanding used in the computation of diluted earnings per share (in thousands): For the Years Ended December 31, 2015 2014 2013 Weighted average basic common shares outstanding 42,747 44,362 45,692 Effect of dilutive securities: Stock options — — 1 Performance shares 98 110 119 Restricted stock 63 128 182 Weighted average diluted common and potential common shares outstanding 42,908 44,600 45,994

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2015
INVENTORIES [Abstract]
Schedule of Inventory, Current [Table Text Block]	Inventories consisted of the following at December 31, 2015 and 2014 (in thousands): 2015 2014 Finished goods $ 25,778 $ 32,249 Parts and materials 12,637 9,147 Work in progress 2,491 1,975 Total inventories $ 40,906 $ 43,371

Property Plant and Equipment (T

Property Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Table Text Block]	The components of property, plant and equipment, net were as follows at December 31, 2015 and 2014 (in thousands): 2015 2014 Land $ 7,894 $ 7,475 Building and leasehold improvements 111,740 106,838 Machinery and equipment 263,858 252,884 Total property, plant and equipment 383,492 367,197 Less - accumulated depreciation (240,281 ) (218,183 ) Property, plant and equipment, net $ 143,211 $ 149,014

Intangibles (Tables)

Intangibles (Tables)	12 Months Ended
	Dec. 31, 2015
Intangibles [Abstract]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	Our estimated amortization expense relating to these intangibles for the next five years is summarized in the following table (in thousands): 2016 $ 850 2017 $ 697 2018 $ 657 2019 $ 608 2020 $ 533
Schedule of Finite-Lived Intangible Assets by Major Class [Table Text Block]	The components of intangibles, net as of December 31, 2015 and 2014 are as follows (in thousands): 2015 2014 Original life in years Gross Carrying Value Accumulated Amortization Gross Carrying Value Accumulated Amortization Acquired trade secrets 2-20 $ 3,065 $ 1,086 $ 1,388 $ 878 Acquired patents and trademarks 4-10 7,869 4,677 6,854 1,601 Agreements not to compete 3-5 894 586 3,849 3,492 Acquired trade names Indefinite 4,562 — 4,522 — Total intangibles, net $ 16,390 $ 6,349 $ 16,613 $ 5,971

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Dec. 31, 2015
Goodwill [Line Items]
Schedule of Goodwill [Table Text Block]	The changes in the carrying amount of goodwill for each reportable segment for the years ended December 31, 2015 , and 2014 were as follows (in thousands): Reservoir Description Production Enhancement Reservoir Management Total Balance at December 31, 2013 $ 80,932 $ 79,560 $ 2,845 $ 163,337 Goodwill acquired during the year 1,127 — — 1,127 Balance at December 31, 2014 82,059 79,560 2,845 164,464 Goodwill acquired during the year 13,695 — — 13,695 Balance at December 31, 2015 $ 95,754 $ 79,560 $ 2,845 $ 178,159

Debt and Capital Lease Obliga34

Debt and Capital Lease Obligations (Tables)	12 Months Ended
	Dec. 31, 2015
Debt [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	Debt at December 31, 2015 and 2014 is summarized in the following table (in thousands): December 31, 2015 December 31, 2014 Senior Notes $ 150,000 $ 150,000 Credit Facility 283,000 206,000 Other indebtedness 2,244 — Total debt 435,244 356,000 Less: Short-term debt included in other indebtedness (2,244 ) — Less: Debt issuance costs (2,013 ) (2,328 ) Long-term debt, net $ 430,987 $ 353,672

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Taxes [Abstract]
Summary of Income Tax Contingencies [Table Text Block]	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands): 2015 2014 2013 Unrecognized tax benefits at January 1, $ 11,747 $ 12,385 $ 13,256 Tax positions, current period 1,044 1,441 1,747 Tax positions, prior period (640 ) 56 (501 ) Settlements with taxing authorities (1,371 ) (947 ) — Lapse of applicable statute of limitations (816 ) (1,188 ) (2,117 ) Unrecognized tax benefits at December 31, $ 9,964 $ 11,747 $ 12,385
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	Deferred tax assets and liabilities as of December 31, 2015 and 2014 are summarized as follows (in thousands): 2015 2014 Deferred tax assets: Net operating loss carry-forwards $ 8,045 $ 6,340 Reserves 18,627 14,135 Unrealized benefit plan loss 5,571 4,925 Unrealized foreign exchange 7,994 2,289 Other 3,229 2,232 Total deferred tax assets 43,466 29,921 Valuation allowance (1) (10,862 ) (7,236 ) Net deferred tax asset 32,604 22,685 Deferred tax liabilities: Intangibles (5,876 ) (5,650 ) Property, plant and equipment (8,372 ) (6,993 ) Accrued interest (10,111 ) (6,841 ) Unrealized foreign exchange (6,421 ) — Other (1,579 ) (3,498 ) Total deferred tax liabilities (32,359 ) (22,982 ) Net deferred income taxes $ 245 $ (297 ) 2015 2014 Current deferred tax assets $ 3,164 $ 6,130 Current deferred tax liabilities (9,731 ) (3,093 ) Long-term deferred tax assets 11,693 3,876 Long-term deferred tax liabilities (4,881 ) (7,210 ) Total deferred tax assets (liabilities) $ 245 $ (297 ) (1) Valuation allowance at 12/31/13 was $6.1 million.
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]	The components of income before income tax expense for 2015 , 2014 and 2013 are as follows (in thousands): 2015 2014 2013 United States $ 55,143 $ 154,943 $ 150,023 Other countries 93,547 180,988 174,079 Income before income tax expense $ 148,690 $ 335,931 $ 324,102
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	The components of income tax expense for 2015 , 2014 and 2013 are as follows (in thousands): 2015 2014 2013 Current: United States $ 17,257 $ 44,350 $ 44,112 Other countries 14,629 23,546 25,103 State and provincial 1,979 4,727 4,903 Total current 33,865 72,623 74,118 Deferred: United States (2,905 ) 2,801 4,754 Other countries 2,947 1,675 1,884 State and provincial (149 ) 206 152 Total deferred (107 ) 4,682 6,790 Income tax expense $ 33,758 $ 77,305 $ 80,908
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	The differences in income tax expense computed using The Netherlands statutory income tax rate of 25% , 25% and 25% in 2015 , 2014 and 2013 , respectively, and our income tax expense as reported in the accompanying Consolidated Statements of Operations for 2015 , 2014 and 2013 are as follows (in thousands): 2015 2014 2013 Tax at The Netherlands income tax rate $ 37,173 $ 83,983 $ 81,026 International earnings taxed at rates other than The Netherlands statutory rate (14,066 ) (6,721 ) (6,698 ) Non-deductible expenses 2,832 2,807 2,138 Change in valuation allowance 3,625 1,150 (1,156 ) State and provincial taxes 1,133 3,339 3,439 Adjustments of prior year taxes 483 (2,973 ) (4,258 ) Adjustments of income tax reserves (1,205 ) (1,570 ) 59 Other 3,783 (2,710 ) 6,358 Income tax expense $ 33,758 $ 77,305 $ 80,908

Pension and Other Postretirem36

Pension and Other Postretirement Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2015
Pension and Other Postretirement Benefit Plans [Abstract]
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]	Amounts recognized for the Dutch Plan in the Consolidated Balance Sheets for the years ended December 31, 2015 and 2014 consist of (in thousands): 2015 2014 Deferred tax asset $ 2,660 $ 2,953 Other long-term liabilities 9,643 11,810 Accumulated other comprehensive loss (9,540 ) (10,812 )
Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]	The following table summarizes the change in the projected benefit obligation and the fair value of plan assets for the years ended December 31, 2015 and 2014 (in thousands): 2015 2014 Projected Benefit Obligation: Projected benefit obligation at beginning of year $ 59,338 $ 49,456 Service cost 1,787 1,445 Interest cost 1,192 1,756 Prior service cost (credit) arising during year — (1,024 ) Benefits paid (982 ) (1,136 ) Administrative expenses (169 ) (220 ) Actuarial (gain) loss, net (4,416 ) 16,667 Unrealized (gain) loss on foreign exchange (5,991 ) (7,606 ) Projected benefit obligation at end of year $ 50,759 $ 59,338 Fair Value of Plan Assets: Fair value of plan assets at beginning of year $ 47,528 $ 39,504 Increase (decrease) in plan asset value (2,279 ) 13,572 Employer contributions 1,829 1,897 Benefits paid (982 ) (1,136 ) Administrative expenses (169 ) (220 ) Unrealized gain (loss) on foreign exchange (4,811 ) (6,089 ) Fair value of plan assets at end of year $ 41,116 $ 47,528 Under-funded status of the plan at end of the year $ (9,643 ) $ (11,810 ) Accumulated Benefit Obligation $ 43,969 $ 50,837
Schedule of Net Benefit Costs [Table Text Block]	The components of net periodic pension cost under this plan for the years ended December 31, 2015 , 2014 , and 2013 included (in thousands): 2015 2014 2013 Service cost $ 1,787 $ 1,445 $ 1,582 Interest cost 1,192 1,756 1,676 Expected return on plan assets (986 ) (1,303 ) (1,291 ) Unrecognized pension asset, net (96 ) (87 ) (87 ) Prior service cost (85 ) 7 159 Unrecognized net actuarial loss 727 540 468 Net periodic pension cost $ 2,539 $ 2,358 $ 2,507
Schedule of Assumptions Used [Table Text Block]	The following actuarial assumptions were used to determine the actuarial present value of our projected benefit obligation at December 31, 2015 and 2014 : 2015 2014 Weighted average assumed discount rate 2.60% 2.20% Weighted average rate of compensation increase 0% - 3% 0% - 3% This net periodic pension cost was calculated using the following assumptions: 2015 2014 Weighted average assumed discount rate 2.60% 3.70% Expected long-term rate of return on plan assets 2.60% 3.30% Weighted average rate of compensation increase 3.00% 3.00%
Schedule of Expected Benefit Payments [Table Text Block]	Expected benefit payments to eligible participants under this plan for the next five years are as follows (in thousands): 2016 $ 1,020 2017 $ 1,148 2018 $ 1,182 2019 $ 1,201 2020 $ 1,317 Succeeding five years $ 7,877

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2015
COMMITMENTS AND CONTINGENCIES [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	Scheduled minimum rental commitments under non-cancellable operating leases at December 31, 2015 , consist of the following (in thousands): 2016 $ 15,565 2017 12,208 2018 9,390 2019 6,507 2020 4,656 Thereafter 18,659 Total commitments $ 66,985

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Amounts recognized, net of tax, in Accumulated other comprehensive income (loss) for the years ended December 31, 2015 and 2014 consist of (in thousands): 2015 2014 Prior service cost $ 661 $ 718 Transition asset — 65 Unrecognized net actuarial loss and foreign exchange (10,201 ) (11,595 ) Fair value of derivatives, net of tax (998 ) (1,082 ) Total Accumulated other comprehensive loss, net of tax $ (10,538 ) $ (11,894 )

Stock-based Compensation (Table

Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2015
Stock-based Compensation [Abstract]
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]	Non-vested restricted share awards outstanding under both the Plan and the Director Plan as of December 31, 2015 and changes during the year were as follows: Number of Shares Weighted Average Grant Date Fair Value per Share Non-vested at December 31, 2014 469,321 $ 132.33 Granted 206,855 101.87 Vested (183,455 ) 113.31 Forfeited (29,117 ) 126.09 Non-vested at December 31, 2015 463,604 $ 126.65
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]	For the years ended December 31, 2015 , 2014 and 2013 , stock-based compensation expense under both the Plan and the Director Plan recognized in the income statement is as follows (in thousands): 2015 2014 2013 Cost of product sales and services $ 10,126 $ 10,331 $ 10,268 General and administrative 11,153 10,139 10,258 Total stock-based compensation expense $ 21,279 $ 20,470 $ 20,526

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2015
Derivatives, Fair Value [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: December 31, 2015 December 31, 2014 Income Statement Classification Derivatives designated as hedges: 5 yr Interest Rate Swap $ 388 $ 100 Interest Expense 10 yr Interest Rate Swap 583 145 Interest Expense $ 971 $ 245
Schedule of Derivative Liabilities at Fair Value [Table Text Block]	The fair values of outstanding derivative instruments are as follows: Fair Value of Derivatives December 31, 2015 December 31, 2014 Balance Sheet Classification Derivatives designated as hedges: 5 yr Interest Rate Swap $ 353 $ 201 Other Liabilities 10 yr Interest Rate Swap 1,229 881 Other Liabilities $ 1,582 $ 1,082

Financial Instruments (Tables)

Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements, Nonrecurring [Table Text Block]	Fair Value Measurement at December 31, 2015 Total Level 1 Level 2 Level 3 Assets: Deferred compensation trust assets (1) $ 23,737 $ — $ 23,737 $ — Liabilities: Deferred compensation plan $ 29,155 $ — $ 29,155 $ — 5 year interest rate swap 353 — 353 — 10 year interest rate swap 1,229 — 1,229 — $ 30,737 $ — $ 30,737 $ —	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 and are intended to fund the deferred compensation agreements.

Other (Income) Expense (Tables)

Other (Income) Expense (Tables)	12 Months Ended
	Dec. 31, 2015
Other (Income) Expense, net [Abstract]
Schedule of Other Operating Cost and Expense, by Component [Table Text Block]	The components of other (income) expense, net, are as follows (in thousands): For the Years Ended December 31, 2015 2014 2013 Sale of assets $ (408 ) $ (764 ) $ (909 ) Results of non-consolidated subsidiaries (383 ) (364 ) (177 ) Foreign exchange 4,507 4,230 4,339 Interest income (56 ) (403 ) (776 ) Rents and royalties (484 ) (817 ) (863 ) Insurance and other settlements — (292 ) (1,611 ) Other, net 493 (521 ) (341 ) Total other (income) expense, net $ 3,669 $ 1,069 $ (338 )
Foreign Currency Gains Losses By Currency [Table Text Block]	. Foreign exchange gains and losses are summarized in the following table (in thousands): For the Years Ended December 31, (Gains) losses by currency 2015 2014 2013 Australian Dollar $ 238 $ 289 $ 432 British Pound 434 1,132 (49 ) Canadian Dollar 1,848 1,886 1,456 Euro (908 ) (1,537 ) 848 Malaysian Ringgit 545 278 421 Mexican Peso 414 284 156 Nigerian Naira 630 432 94 Other currencies, net 1,306 1,466 981 Total (gain) loss, net $ 4,507 $ 4,230 4,339

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenue from External Customers by Products and Services [Table Text Block]	SEGMENT BREAKDOWN BETWEEN SERVICES / PRODUCT SALES For the Years Ended December 31, 2015 2014 2013 Reservoir Description Services $ 445,729 $ 495,658 $ 493,402 Production Enhancement Services 121,675 220,177 209,770 Reservoir Management Services 44,550 65,037 62,256 Total Revenue - Services $ 611,954 $ 780,872 $ 765,428 Reservoir Description Product sales $ 27,643 $ 23,316 $ 28,849 Production Enhancement Product sales 145,549 247,400 242,645 Reservoir Management Product sales 12,374 33,634 36,586 Total Revenue - Product sales $ 185,566 $ 304,350 $ 308,080 Total Revenue $ 797,520 $ 1,085,222 $ 1,073,508
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Results for these business segments are presented below. We use the same accounting policies to prepare our b Results for these business segments are presented below. We use the same accounting policies to prepare our business segment results as are used to prepare our Consolidated Financial Statements. All interest and other non-operating income (expense) is attributable to Corporate & Other area and is not allocated to specific business 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 December 31, 2015 Revenues from unaffiliated clients $ 473,372 $ 267,224 $ 56,924 $ — $ 797,520 Inter-segment revenues 8,674 1,837 248 (10,759 ) — Segment operating income (loss) 111,032 35,027 15,655 (644 ) 161,070 Total assets (at end of period) 326,182 210,214 27,076 61,786 625,258 Capital expenditures 17,849 3,292 273 1,383 22,797 Depreciation and amortization 16,778 6,611 1,624 2,444 27,457 December 31, 2014 Revenues from unaffiliated clients $ 518,974 $ 467,577 $ 98,671 $ — $ 1,085,222 Inter-segment revenue 10,387 2,459 366 (13,212 ) — Segment operating income (loss) 143,624 165,204 37,220 483 346,531 Total assets (at end of period) 319,325 257,135 34,179 62,686 673,325 Capital expenditures 21,371 7,990 2,681 4,544 36,586 Depreciation and amortization 15,816 7,509 1,393 1,978 26,696 December 31, 2013 Revenue from unaffiliated clients $ 522,251 $ 452,415 $ 98,842 $ — $ 1,073,508 Inter-segment revenue 3,432 3,140 1,742 (8,314 ) — Segment operating income (loss) 146,338 154,715 31,555 811 333,419 Total assets (at end of period) 321,106 255,764 37,660 44,834 659,364 Capital expenditures 22,601 7,124 1,366 4,325 35,416 Depreciation and amortization 14,898 7,745 945 1,883 25,471 (1) "Corporate and other" represents those items that are not directly relating to a particular segment and eliminations.
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]	The following table shows a summary of our U.S. and non-U.S. operations (with 2013 revenue reclassified as described above) for December 31, 2015 , 2014 and 2013 (in thousands): GEOGRAPHIC INFORMATION United States Canada Other Countries (1) (2) Consolidated December 31, 2015 Revenue $ 338,907 $ 43,808 $ 414,805 $ 797,520 Property, plant and equipment, net 80,603 12,082 50,526 143,211 December 31, 2014 Revenue $ 515,643 $ 105,244 $ 464,335 $ 1,085,222 Property, plant and equipment, net 83,748 16,057 49,209 149,014 December 31, 2013 Revenue $ 487,252 $ 107,842 $ 478,414 $ 1,073,508 Property, plant and equipment, net 73,870 17,195 47,759 138,824 (1) Revenue earned in other countries, including The Netherlands, was not individually greater than 10% of our consolidated revenue in 2015, 2014 or 2013. (2) Property, plant and equipment, net in other countries, including The Netherlands, were not individually greater than 10% of our consolidated fixed assets in 2015, 2014 or 2013.

Unaudited Selected Quarterly 44

Unaudited Selected Quarterly Results of Operations (Tables)	12 Months Ended
	Dec. 31, 2015
Unaudited Selected Quarterly Results of Operations [Abstract]
Schedule of Quarterly Financial Information [Table Text Block]	Summarized below is our unaudited quarterly financial data for the quarters ended December 31, 2015 and 2014 (in thousands, except per share data): Quarter ended 2015 December 31 September 30 June 30 March 31 Services and product sales revenue $ 182,723 $ 197,265 $ 203,889 $ 213,643 Cost of services and product sales 124,709 129,050 134,619 144,274 Other operating expenses 34,372 21,397 21,377 26,652 Operating income 23,642 46,818 47,893 42,717 Interest expense 3,390 3,471 3,116 2,403 Income before income tax expense 20,252 43,347 44,777 40,314 Income tax expense 4,658 9,753 10,075 9,272 Net income 15,594 33,594 34,702 31,042 Net income (loss) attributable to non-controlling interest 176 190 76 (357 ) Net income attributable to Core Laboratories N.V. $ 15,418 $ 33,404 $ 34,626 $ 31,399 Per share information: Basic earnings per share (1) $ 0.36 $ 0.79 $ 0.81 $ 0.72 Diluted earnings per share (1) $ 0.36 $ 0.78 $ 0.81 $ 0.72 Weighted average common shares outstanding: Basic 42,355 42,517 42,790 43,340 Diluted 42,518 42,685 42,959 43,466 Quarter ended 2014 December 31 September 30 June 30 March 31 Services and product sales revenue $ 278,622 $ 276,135 $ 267,562 $ 262,903 Cost of services and product sales 168,517 166,927 168,158 161,669 Other operating expenses 19,655 20,088 15,270 18,407 Operating income 90,450 89,120 84,134 82,827 Interest expense 2,882 2,561 2,794 2,363 Income before income tax expense 87,568 86,559 81,340 80,464 Income tax expense 20,841 19,909 17,244 19,311 Net income 66,727 66,650 64,096 61,153 Net income attributable to non-controlling interest 537 153 362 89 Net income attributable to Core Laboratories N.V. $ 66,190 $ 66,497 $ 63,734 $ 61,064 Per share information: Basic earnings per share (1) $ 1.51 $ 1.51 $ 1.43 $ 1.36 Diluted earnings per share (1) $ 1.51 $ 1.50 $ 1.42 $ 1.35 Weighted average common shares outstanding: Basic 43,742 44,152 44,660 44,908 Diluted 43,927 44,381 44,910 45,182 (1) The sum of the individual quarterly earnings per share amounts may not agree with the year-to-date earnings per share amounts as each quarterly computation is based on the weighted average number of common shares outstanding during that period.

Description of Business (Detail

Description of Business (Details)	Dec. 31, 2015
Number of Countries in which Entity Operates	50
Number of Stores	70
Entity Number of Employees	4,400

Significant Accounting Polici46

Significant Accounting Policies (Details) - shares shares in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Weighted Average Number of Shares Outstanding, Basic	42,355	42,517	42,790	43,340	43,742	44,152	44,660	44,908	42,747	44,362	45,692
Incremental Common Shares Attributable to Stock Options									0	0	1
Incremental Common Shares Attributable to Contingently Issuable Shares									98	110	119
Weighted Average Number of Shares, Restricted Stock									63	128	182
Weighted Average Number of Shares Outstanding, Diluted	42,518	42,685	42,959	43,466	43,927	44,381	44,910	45,182	42,908	44,600	45,994

Significant Accounting Polici47

Significant Accounting Policies Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Cash Surrender Value of Life Insurance	$ 36,087	$ 36,869
Equity Method Investments	2,719	2,336
Other Assets, Miscellaneous, Noncurrent	4,801	4,304
Other Assets, Noncurrent	$ 43,607	$ 43,509

Significant Accounting Polici48

Significant Accounting Policies Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Allowance for Doubtful Accounts Receivable, Current	$ 4,136	$ 3,397

Significant Accounting Polici49

Significant Accounting Policies Foreign Currency (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Component of Other Operating Cost [Line Items]
Other Nonoperating Income (Expense)	$ 3,669	$ 1,069	$ (338)
Foreign Currency Gain (Loss) [Member]
Component of Other Operating Cost [Line Items]
Other Nonoperating Income (Expense)	$ 4,507	$ 4,230	$ 4,339

Acquisitions (Details)

Acquisitions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Acquisition Costs, Period Cost	$ 17,200
Goodwill, Acquired During Period	13,695	$ 1,127
Finite-lived Intangible Assets Acquired	$ 2,000

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Inventory, Finished Goods, Net of Reserves	$ 25,778	$ 32,249
Inventory, Raw Materials and Purchased Parts, Net of Reserves	12,637	9,147
Inventory, Work in Process, Net of Reserves	2,491	1,975
Inventory, Net	$ 40,906	$ 43,371

Property Plant and Equipment (D

Property Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Land	$ 7,894	$ 7,475
Buildings and Improvements, Gross	111,740	106,838
Machinery and Equipment, Gross	263,858	252,884
Property, Plant and Equipment, Gross	383,492	367,197
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(240,281)	(218,183)
Property, Plant and Equipment, Net	$ (143,211)	$ (149,014)	$ (138,824)

Intangibles (Details)

Intangibles (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Future Amortization Expense, Year One	$ 850
Future Amortization Expense, Year Two	697
Future Amortization Expense, Year Three	657
Future Amortization Expense, Year Four	608
Future Amortization Expense, Year Five	533
Accumulated Amortization	6,349	$ 5,971
Intangible Assets Gross	16,390	16,613
Trade Secrets [Member]
Accumulated Amortization	1,086	878
Intangible Assets Gross	3,065	1,388
Patents [Member]
Accumulated Amortization	4,677	1,601
Intangible Assets Gross	7,869	6,854
Noncompete Agreements [Member]
Accumulated Amortization	586	3,492
Intangible Assets Gross	894	3,849
Trade name infinite lived [Member]
Accumulated Amortization	0	0
Intangible Assets Gross	$ 4,562	$ 4,522
Minimum [Member] | Trade Secrets [Member]
Finite-Lived Intangible Asset, Useful Life	2 years
Minimum [Member] | Patents [Member]
Finite-Lived Intangible Asset, Useful Life	4 years
Minimum [Member] | Noncompete Agreements [Member]
Finite-Lived Intangible Asset, Useful Life	3 years
Maximum [Member] | Trade Secrets [Member]
Finite-Lived Intangible Asset, Useful Life	20 years
Maximum [Member] | Patents [Member]
Finite-Lived Intangible Asset, Useful Life	10 years
Maximum [Member] | Noncompete Agreements [Member]
Finite-Lived Intangible Asset, Useful Life	5 years

Goodwill (Details)

Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
GOODWILL	$ 178,159	$ 164,464	$ 163,337
Goodwill, Acquired During Period	13,695	1,127
Reservoir Description Segment [Member]
Goodwill [Line Items]
GOODWILL	95,754	82,059	80,932
Goodwill, Acquired During Period	13,695	1,127
Production Enhancement Segment [Member]
Goodwill [Line Items]
GOODWILL	79,560	79,560	79,560
Goodwill, Acquired During Period	0	0
Reservoir Management Segment [Member]
Goodwill [Line Items]
GOODWILL	2,845	2,845	$ 2,845
Goodwill, Acquired During Period	$ 0	$ 0

Debt and Capital Lease Obliga55

Debt and Capital Lease Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Amount	$ 200,000
Debt Instrument, Maturity Date	Aug. 29, 2019
Line of Credit Facility, Previous Borrowing Capacity	$ 350,000
Long-term Debt	(435,244)	$ (356,000)
Long-term Debt, Excluding Current Maturities	430,987	353,672
Cash payments for interest	12,313	10,272	$ 8,869
Line of Credit Facility, Current Borrowing Capacity	400,000
Line of Credit Facility, Maximum Borrowing Capacity	450,000
Performance bonds under credit facility	25,000
Line of Credit Facility, Remaining Borrowing Capacity	92,000
Performance Bonds	12,300
Long-term Debt, Percentage Bearing Variable Interest, Amount	233,000
Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	150,000
Long-term Debt	(150,000)	(150,000)
Line of Credit [Member]
Debt Instrument [Line Items]
Long-term Debt	(283,000)	(206,000)
Other indebtedness [Domain]
Debt Instrument [Line Items]
Long-term Debt	(2,244)
Short-term Debt [Member]
Debt Instrument [Line Items]
Long-term Debt	(2,244)	0
Debt issuance costs [Domain]
Debt Instrument [Line Items]
Long-term Debt	(2,013)	$ (2,328)
senior notes series a [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 75,000
Debt Instrument, Maturity Date	Sep. 30, 2021
Debt Instrument, Interest Rate, Effective Percentage	4.01%
Senior Notes Series B [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 75,000
Debt Instrument, Maturity Date	Sep. 30, 2023
Debt Instrument, Interest Rate, Effective Percentage	4.11%
Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.25%	1.25%
Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.00%

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards	$ 30,800								$ 30,800
Expired net operating loss carryforwards	3,900								3,900
Current Federal Tax Expense (Benefit)									17,257	$ 44,350	$ 44,112
Current Foreign Tax Expense (Benefit)									14,629	23,546	25,103
Current State and Local Tax Expense (Benefit)									1,979	4,727	4,903
Current Income Tax Expense (Benefit)									33,865	72,623	74,118
Deferred Federal Income Tax Expense (Benefit)									(2,905)	2,801	4,754
Deferred Foreign Income Tax Expense (Benefit)									2,947	1,675	1,884
Deferred State and Local Income Tax Expense (Benefit)									(149)	206	152
Deferred Income Tax Expense (Benefit)									(107)	4,682	6,790
Income Tax Expense (Benefit)	$ 4,658	$ 9,753	$ 10,075	$ 9,272	$ 20,841	$ 19,909	$ 17,244	$ 19,311	$ 33,758	$ 77,305	$ 80,908

Income Taxes Income tax expense

Income Taxes Income tax expense, income tax reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate									25.00%	25.00%	25.00%
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate									$ 37,173	$ 83,983	$ 81,026
Income Tax Reconciliation, Foreign Income Tax Rate Differential									(14,066)	(6,721)	(6,698)
Income Tax Reconciliation, Nondeductible Expense									2,832	2,807	2,138
Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance									3,625	1,150	(1,156)
Income Tax Reconciliation, State and Local Income Taxes									1,133	3,339	3,439
Income Tax Reconciliation, Prior Year Income Taxes									483	(2,973)	(4,258)
Income Tax Reconciliation, Other Adjustments									(1,205)	(1,570)	59
Income Tax Reconciliation, Other Reconciling Items									3,783	(2,710)	6,358
Income Tax Expense (Benefit)	$ 4,658	$ 9,753	$ 10,075	$ 9,272	$ 20,841	$ 19,909	$ 17,244	$ 19,311	$ 33,758	$ 77,305	$ 80,908

Income Taxes Income Before Inco

Income Taxes Income Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income (Loss) from Continuing Operations before Income Taxes, Domestic	$ 55,143	$ 154,943	$ 150,023
Income (Loss) from Continuing Operations before Income Taxes, Foreign	93,547	180,988	174,079
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	$ 148,690	$ 335,931	$ 324,102

Income Taxes Deferred Tax Asset

Income Taxes Deferred Tax Assets Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets, Operating Loss Carryforwards	$ 8,045	$ 6,340
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Reserves	18,627	14,135
Deferred Tax Liabilities, Property, Plant and Equipment	(8,372)	(6,993)
Deferred Tax Liabilities, Deferred Expense, Capitalized Interest	(10,111)	(6,841)
Deferred Tax Liabilities, Unrealized Currency Transaction Gains	(6,421)	0
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits	5,571	4,925
Deferred Tax Assets, Unrealized Currency Losses	7,994	2,289
Deferred Tax Assets, Other	3,229	2,232
Deferred Tax Assets, Gross	43,466	29,921
Deferred Tax Assets, Valuation Allowance	(10,862)	(7,236)
Deferred Tax Assets, Net	32,604	22,685
Deferred Tax Liabilities, Goodwill and Intangible Assets, Intangible Assets	(5,876)	(5,650)
Deferred Tax Liabilities, Other	(1,579)	(3,498)
Deferred Tax Liabilities	(32,359)	(22,982)
Deferred Tax Assets (Liabilities), Net	245	(297)
Deferred Tax Assets, Net, Current	3,164	6,130
Deferred Tax Liabilities, Current	(9,731)	(3,093)
Deferred Tax Assets, Net, Noncurrent	11,693	3,876
Deferred Tax Liabilities, Noncurrent	(4,881)	(7,210)
Foreign Pension Plans, Defined Benefit [Member]
Deferred Tax Assets, Net	$ 2,660	$ 2,953

Income Taxes Income Tax Conting

Income Taxes Income Tax Contingency (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$ (500)	$ (1,100)	$ 900
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	2,000	2,500	3,600
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	1,044	1,441	1,747
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	(640)	56	(501)
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	(1,371)	(947)	0
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations	(816)	(1,188)	(2,117)
Unrecognized Tax Benefits	$ 9,964	$ 11,747	$ 12,385	$ 13,256

Income Taxes Equity (Details)

Income Taxes Equity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	$ 3,020	$ 3,744
Additional Paid-in Capital [Member]
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	$ 3,020	$ 3,744

Income Taxes Summary of Valuati

Income Taxes Summary of Valuation Allowance (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Valuation Allowance [Line Items]
Valuation Allowance, Amount	$ 10,862	$ 7,236

Pension and Other Postretirem63

Pension and Other Postretirement Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Employer Contribution	$ 300
Deferred Compensation Arrangement with Individual, Compensation Expense	1,700	$ 1,900	$ 3,500
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(85)	$ 7	159
Defined Benefit Plan, Future Amortization of Transition Obligation (Asset)	$ 100
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	2.60%	3.70%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.60%	2.20%
Defined Benefit Plan, Benefit Obligation	$ 50,759	$ 59,338	49,456
Defined Benefit Plan, Service Cost	1,787	1,445	1,582
Defined Benefit Plan, Interest Cost	1,192	1,756	1,676
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit), Tax	0	(1,024)	(583)
Defined Benefit Plan, Benefits Paid	(982)	(1,136)
defined benefit plan, Administrative Expenses	(169)	(220)
Defined Benefit Plan, Actuarial Net (Gains) Losses	(4,416)	16,667
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Benefit Obligation	$ (5,991)	$ (7,606)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	2.60%	3.30%
Defined Benefit Plan, Future Amortization of Gain (Loss)	$ (600)
Defined Benefit Plan, Amortization of Transition Obligations (Assets)	$ (96)	$ (87)	(87)
Weighted average rate of compensation increase	0% - 3%	0% - 3%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	3.00%	3.00%
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	$ (4,811)	$ (6,089)
Defined Benefit Plan, Fair Value of Plan Assets	41,116	47,528	$ 39,504
Defined Benefit Plan, Actual Return on Plan Assets	(2,279)	13,572
Defined Benefit Plan, Contributions by Employer	1,829	1,897
Defined Benefit Plan, Funded Status of Plan	(9,643)	(11,810)
Defined Benefit Plan, Accumulated Benefit Obligation	43,969	50,837
Interest Rate Swap [Domain]
Defined Benefit Plan Disclosure [Line Items]
Interest Rate Derivatives, at Fair Value, Net	$ (998)	$ (1,082)

Pension and Other Postretirem64

Pension and Other Postretirement Benefit Plans Schedule of Amounts Recognized in Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Other Assets, Noncurrent	$ 43,607	$ 43,509
Deferred Tax Assets, Net	32,604	22,685
Other Liabilities, Noncurrent	48,853	43,879
Accumulated Other Comprehensive Income (Loss), Net of Tax	(10,538)	(11,894)
Foreign Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred Tax Assets, Net	2,660	2,953
Other Liabilities, Noncurrent	9,643	11,810
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (9,540)	$ (10,812)

Pension and Other Postretirem65

Pension and Other Postretirement Benefit Plans Components of Net Periodic Pension Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan, Service Cost	$ 1,787	$ 1,445	$ 1,582
Defined Benefit Plan, Interest Cost	1,192	1,756	1,676
Defined Benefit Plan, Expected Return on Plan Assets	(986)	(1,303)	(1,291)
Defined Benefit Plan, Amortization of Transition Obligations (Assets)	(96)	(87)	(87)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(85)	7	159
Defined Benefit Plan, Amortization of Gains (Losses)	727	540	468
Defined Benefit Plan, Net Periodic Benefit Cost	$ 2,539	$ 2,358	$ 2,507

Pension and Other Postretirem66

Pension and Other Postretirement Benefit Plans Schedule of Expected Benefit Payments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	$ 1,800
Defined Benefit Plan, Expected Future Benefit Payments in Year One	1,020
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	1,148
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	1,182
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	1,201
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	1,317
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	$ 7,877

Pension and Other Postretirem67

Pension and Other Postretirement Benefit Plans Defined Contribution Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Contribution Plan, Cost Recognized	$ 6.9	$ 7.9	$ 7.1

Pension and Other Postretirem68

Pension and Other Postretirement Benefit Plans Deferred Compensation Arrangements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense	$ 1.7	$ 1.9	$ 3.5
Deferred Compensation Arrangement with Individual, Employer Contribution	$ 0.3

Commitments and Contingencies69

Commitments and Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Loss Contingency [Abstract]
Supplemental Unemployment Benefits, Severance Benefits	$ 8,400
Operating Leases, Rent Expense	22,200	$ 24,100	$ 23,200
Operating Leases, Future Minimum Payments Due [Abstract]
Operating Leases, Future Minimum Payments Due, Current	15,565
Operating Leases, Future Minimum Payments, Due in Two Years	12,208
Operating Leases, Future Minimum Payments, Due in Three Years	9,390
Operating Leases, Future Minimum Payments, Due in Four Years	6,507
Operating Leases, Future Minimum Payments, Due in Five Years	4,656
Operating Leases, Future Minimum Payments, Due Thereafter	18,659
Operating Leases, Future Minimum Payments Due	66,985
Proposed tax deficiency	$ 11,000

Equity (Details)

Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended			146 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014
Treasury Stock, Shares, Acquired					39,311,745
Treasury Stock, Value, Acquired, Cost Method					$ 1,600,000
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ (10,538)	$ (11,894)		$ (11,894)
Treasury Stock Acquired, Average Cost Per Share					$ 41.08
Treasury Stock, Shares, Retired		1,250,000			32,225,406
Treasury Stock, Retired, Cost Method, Amount		$ 0	$ 0	$ 0	$ 1,049,400
Treasury Stock, Shares		1,974,097	1,963,018		1,963,018
Stock Repurchase Program, Remaining Authorized Repurchase Amount		2,460,903
Common Stock, Dividends, Per Share, Cash Paid		$ 0.55
Dividends		$ (94,235)	$ (89,089)	$ (58,642)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Prior Service Cost (Credit), before Tax		661	718		$ 718
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Transition Assets (Obligations), before Tax		0	65		65
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax		$ (10,201)	$ (11,595)		$ (11,595)
Subsequent Event [Member]
Treasury Stock, Shares, Acquired	270
Treasury Stock, Value, Acquired, Cost Method	$ 0
Common Stock, Dividends, Per Share, Declared	$ 0.55

Stock-based Compensation (Detai

Stock-based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation		$ 3,020	$ 3,744
Treasury Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			(12,000)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	(183,455)	(216,395)	(222,176)
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation		$ 0	$ 0
Performance Share Award Program [Member] | Performance Share Award Program 2013 Grant [Domain] | Restricted Stock Units (RSUs) [Member] | Employee stock award program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock comp shares surrendered	25,162
Stock comp shares surrendered, value	$ 2,700
Stock comp shares surrendered, per share price	$ 108.74
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	$ 400

Stock-based Compensation Employ

Stock-based Compensation Employee Service Share-based Compensation, Allocation of Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation	$ 21,279	$ 20,470	$ 20,526
Cost of services and sales, exclusive of depreciation [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation	10,126	10,331	10,268
General and Adminstrative Expense, exclusive of depreciation [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation	$ 11,153	$ 10,139	$ 10,258

Stock-based Compensation Share

Stock-based Compensation Share Based Compensation by Payment Award (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended			146 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	463,604	469,321		469,321
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 126.65	$ 132.33		$ 132.33
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	206,855
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 101.87
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	(183,455)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 113.31
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(29,117)
Treasury Stock, Shares, Acquired				39,311,745
Treasury Stock, Value, Acquired, Cost Method				$ 1,600,000
Treasury Stock Acquired, Average Cost Per Share				$ 41.08
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value	$ 126.09
Share-based Compensation	$ 21,279	$ 20,470	$ 20,526
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation		$ 3,020	$ 3,744
Share-based Compensation, Shares Authorized under Stock Options Plans, by Exercise Price Range, Range 1 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit		$ 0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit		$ 0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Range 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Range 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Range 4 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Range 5 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 0
Restricted Stock Units (RSUs) [Member] | Director Stock Award Program [Member] | Restricted Share Award Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	8,616	4,536	7,616
Share-based Compensation	$ 900	$ 900	$ 700
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	21 months
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 1,100
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 900,000	$ 900,000	$ 1,000,000
Restricted Stock Units (RSUs) [Member] | Director Stock Award Program [Member] | Total Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	1,400,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	558,139
Restricted Stock Units (RSUs) [Member] | Employee stock award program [Member] | Restricted Share Award Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	91,784	80,983	94,620
Share-based Compensation	$ 10,400	$ 10,500	$ 10,300
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	45 months
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 30,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 8,900,000	$ 15,000,000	$ 12,300,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Intrinsic Value	$ 10,400,000	$ 10,400,000	$ 9,900,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ 200	$ 2,900	$ 3,000
Restricted Stock Units (RSUs) [Member] | Employee stock award program [Member] | Total Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	11,900,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	1,385,624
Restricted Stock Units (RSUs) [Member] | Performance Share Award Program 2013 Grant [Domain] | Employee stock award program [Member] | Performance Share Award Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			79,660
Share-based Compensation	$ 3,200	$ 2,900	$ 3,400
Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Performance-Based Units, Vested and Expected to Vest [Table Text Block]			73,660
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	$ 400
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 9,500,000
Restricted Stock Units (RSUs) [Member] | Performance Share Award Program 2014 Grant [Domain] | Employee stock award program [Member] | Performance Share Award Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		53,548
Share-based Compensation	$ 3,000	$ 3,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	12 months
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 9,000,000
Restricted Stock Units (RSUs) [Member] | Performance Share Award Program 2015 Grant [Domain] | Employee stock award program [Member] | Performance Share Award Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	106,455
Share-based Compensation	$ 3,800
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	24 months
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 11,300,000

Stock-based Compensation Stock

Stock-based Compensation Stock Based Compensation Phantom (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Options Plans, by Exercise Price Range, Range 1 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit		$ 0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit		$ 0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Range 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Range 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Range 4 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Range 5 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 0

Derivative Instruments (Details

Derivative Instruments (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 50
Derivative, Amount of Hedged Item	$ 50
Interest Rate Swap No. 2 [Member]
Derivatives, Fair Value [Line Items]
Derivative, Maturity Date	Aug. 29, 2019
Derivative, Notional Amount	$ 25
Derivative, Fixed Interest Rate	1.73%
Interest Rate Swap No. 1 [Member]
Derivatives, Fair Value [Line Items]
Derivative, Maturity Date	Aug. 29, 2024
Derivative, Notional Amount	$ 25
Derivative, Fixed Interest Rate	2.50%

Derivative Instruments Derivati

Derivative Instruments Derivative gain loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Interest Rate Swap No. 2 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
5 yr Interest Rate Swap	$ 388	$ 100
Interest Rate Derivative Liabilities, at Fair Value	353	201
Interest Rate Swap No. 1 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
5 yr Interest Rate Swap	583	145
Interest Rate Derivative Liabilities, at Fair Value	1,229	881
Interest Rate Swap [Domain]
Derivative Instruments, Gain (Loss) [Line Items]
5 yr Interest Rate Swap	971	245
Interest Rate Derivative Liabilities, at Fair Value	$ 1,582	$ 1,082

Financial Instruments (Details)

Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation trust assets (1)	$ 23,737	$ 24,199
Deferred Compensation Liability, Current	29,155	29,153
Deferred compensation plan	30,737	30,235
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation trust assets (1)	0	0
Deferred Compensation Liability, Current	0	0
Deferred compensation plan	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation trust assets (1)	23,737	24,199
Deferred Compensation Liability, Current	29,155	29,153
Deferred compensation plan	30,737	30,235
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation trust assets (1)	0	0
Deferred Compensation Liability, Current	0	0
Deferred compensation plan	0	0
Interest Rate Swap No. 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	353	201
Interest Rate Swap No. 2 [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [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, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	353	201
Interest Rate Swap No. 2 [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	0	0
Interest Rate Swap No. 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	1,229	881
Interest Rate Swap No. 1 [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [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, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	1,229	881
Interest Rate Swap No. 1 [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$ 0	$ 0

Other (Income) Expense (Details

Other (Income) Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other operating expenses [Line Items]
Other Nonoperating Income (Expense)	$ 3,669	$ 1,069	$ (338)
Other Income [Member]
Other operating expenses [Line Items]
Other Nonoperating Income (Expense)	493	(521)	(341)
gain loss on sale of asset [Member]
Other operating expenses [Line Items]
Other Nonoperating Income (Expense)	(408)	(764)	(909)
Investment Income [Member]
Other operating expenses [Line Items]
Other Nonoperating Income (Expense)	(383)	(364)	(177)
Interest Income [Member]
Other operating expenses [Line Items]
Other Nonoperating Income (Expense)	(56)	(403)	(776)
Foreign Currency Gain (Loss) [Member]
Other operating expenses [Line Items]
Other Nonoperating Income (Expense)	4,507	4,230	4,339
Rents And Royalties Income Loss [Member]
Other operating expenses [Line Items]
Other Nonoperating Income (Expense)	(484)	(817)	(863)
gain loss on insurance recovery [Member]
Other operating expenses [Line Items]
Other Nonoperating Income (Expense)	$ 0	$ (292)	$ (1,611)

Other (Income) Expense Foreign

Other (Income) Expense Foreign Currency Gain Loss by Currency (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Foreign Currency Transaction Gain (Loss), before Tax	$ 4,507	$ 4,230	$ 4,339
AustralianDollar [Member]
Foreign Currency Transaction Gain (Loss), before Tax	238	289	432
British Pound [Member]
Foreign Currency Transaction Gain (Loss), before Tax	434	1,132	(49)
Canadian Dollar [Member]
Foreign Currency Transaction Gain (Loss), before Tax	1,848	1,886	1,456
Euro [Member]
Foreign Currency Transaction Gain (Loss), before Tax	(908)	(1,537)	848
Malaysian Ringgit [Member]
Foreign Currency Transaction Gain (Loss), before Tax	545	278	421
Mexican Peso [Member]
Foreign Currency Transaction Gain (Loss), before Tax	414	284	156
Nigerian Naira [Member]
Foreign Currency Transaction Gain (Loss), before Tax	630	432	94
Other Currencies Net [Member]
Foreign Currency Transaction Gain (Loss), before Tax	$ 1,306	$ 1,466	$ 981

Severance and Other Charges (De

Severance and Other Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Severance and Other Charges [Abstract]
Severance charges	$ 8,800
Loss Contingency, Loss in Period	8,600
Asset Impairment Charges	5,199	$ 0	$ 0
Asset impairment and facility exit costs	5,500
Accrued severance charges	$ 3,600

Segment Reporting (Details)

Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenue, Net	$ 182,723	$ 197,265	$ 203,889	$ 213,643	$ 278,622	$ 276,135	$ 267,562	$ 262,903	$ 797,520	$ 1,085,222	$ 1,073,508
Segment Reporting Information, Intersegment Revenue									0	0	0
Income Before Interest Expense and Taxes	23,642	$ 46,818	$ 47,893	$ 42,717	90,450	$ 89,120	$ 84,134	$ 82,827	161,070	346,531	333,419
Assets	625,258				673,325				625,258	673,325	659,364
Payments to Acquire Property, Plant, and Equipment									22,797	36,586	35,416
Depreciation and amortization									27,457	26,696	25,471
Operating Segment Reservoir Description [Member]
Segment Reporting Information [Line Items]
Revenue, Net									473,372	518,974	522,251
Segment Reporting Information, Intersegment Revenue									8,674	10,387	3,432
Income Before Interest Expense and Taxes									111,032	143,624	146,338
Assets	326,182				319,325				326,182	319,325	321,106
Payments to Acquire Property, Plant, and Equipment									17,849	21,371	22,601
Depreciation and amortization									16,778	15,816	14,898
Operating Segment Production Enhancement [Member]
Segment Reporting Information [Line Items]
Revenue, Net									267,224	467,577	452,415
Segment Reporting Information, Intersegment Revenue									1,837	2,459	3,140
Income Before Interest Expense and Taxes									35,027	165,204	154,715
Assets	210,214				257,135				210,214	257,135	255,764
Payments to Acquire Property, Plant, and Equipment									3,292	7,990	7,124
Depreciation and amortization									6,611	7,509	7,745
Operating Segment Reservoir Management [Member]
Segment Reporting Information [Line Items]
Revenue, Net									56,924	98,671	98,842
Segment Reporting Information, Intersegment Revenue									248	366	1,742
Income Before Interest Expense and Taxes									15,655	37,220	31,555
Assets	27,076				34,179				27,076	34,179	37,660
Payments to Acquire Property, Plant, and Equipment									273	2,681	1,366
Depreciation and amortization									1,624	1,393	945
Operating Segment Corporate And Other [Member]
Segment Reporting Information [Line Items]
Revenue, Net									0	0	0
Segment Reporting Information, Intersegment Revenue									(10,759)	(13,212)	(8,314)
Income Before Interest Expense and Taxes									(644)	483	811
Assets	$ 61,786				$ 62,686				61,786	62,686	44,834
Payments to Acquire Property, Plant, and Equipment									1,383	4,544	4,325
Depreciation and amortization									$ 2,444	$ 1,978	$ 1,883

Segment Reporting Schedule of R

Segment Reporting Schedule of Revenues from External Customers and Long-Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net	$ 182,723	$ 197,265	$ 203,889	$ 213,643	$ 278,622	$ 276,135	$ 267,562	$ 262,903	$ 797,520	$ 1,085,222	$ 1,073,508
Property, Plant and Equipment, Net	143,211				149,014				143,211	149,014	138,824
Income Before Interest Expense and Taxes	23,642	$ 46,818	$ 47,893	$ 42,717	90,450	$ 89,120	$ 84,134	$ 82,827	161,070	346,531	333,419
Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									414,805	464,335	478,414
Property, Plant and Equipment, Net	50,526				49,209				50,526	49,209	47,759
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									338,907	515,643	487,252
Property, Plant and Equipment, Net	80,603				83,748				80,603	83,748	73,870
CANADA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									43,808	105,244	107,842
Property, Plant and Equipment, Net	$ 12,082				$ 16,057				$ 12,082	$ 16,057	$ 17,195

Segment Reporting Revenue by Pr

Segment Reporting Revenue by Product Sales and Services (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue from External Customer [Line Items]
Sales Revenue, Services, Net									$ 611,954	$ 780,872	$ 765,428
Sales Revenue, Goods, Net									185,566	304,350	308,080
Total Revenue	$ 182,723	$ 197,265	$ 203,889	$ 213,643	$ 278,622	$ 276,135	$ 267,562	$ 262,903	797,520	1,085,222	1,073,508
Operating Segment Reservoir Description [Member]
Revenue from External Customer [Line Items]
Sales Revenue, Services, Net									445,729	495,658	493,402
Sales Revenue, Goods, Net									27,643	23,316	28,849
Total Revenue									473,372	518,974	522,251
Operating Segment Production Enhancement [Member]
Revenue from External Customer [Line Items]
Sales Revenue, Services, Net									121,675	220,177	209,770
Sales Revenue, Goods, Net									145,549	247,400	242,645
Total Revenue									267,224	467,577	452,415
Operating Segment Reservoir Management [Member]
Revenue from External Customer [Line Items]
Sales Revenue, Services, Net									44,550	65,037	62,256
Sales Revenue, Goods, Net									12,374	33,634	36,586
Total Revenue									$ 56,924	$ 98,671	$ 98,842

Unaudited Selected Quarterly 84

Unaudited Selected Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue, Net	$ 182,723	$ 197,265	$ 203,889	$ 213,643	$ 278,622	$ 276,135	$ 267,562	$ 262,903	$ 797,520	$ 1,085,222	$ 1,073,508
Cost of Services and Goods Sold	124,709	129,050	134,619	144,274	168,517	166,927	168,158	161,669
Other operating expenses	34,372	21,397	21,377	26,652	19,655	20,088	15,270	18,407
Income Before Interest Expense and Taxes	23,642	46,818	47,893	42,717	90,450	89,120	84,134	82,827	161,070	346,531	333,419
Interest Expense and (Gain) Loss on Extinguishment of Debt	3,390	3,471	3,116	2,403	2,882	2,561	2,794	2,363
Income before income tax expense	20,252	43,347	44,777	40,314	87,568	86,559	81,340	80,464	148,690	335,931	324,102
Income Tax Expense (Benefit)	4,658	9,753	10,075	9,272	20,841	19,909	17,244	19,311	33,758	77,305	80,908
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	15,594	33,594	34,702	31,042	66,727	66,650	64,096	61,153	114,932	258,626	243,194
Net Income (Loss) Attributable to Noncontrolling Interest	176	190	76	(357)	537	153	362	89	85	1,141	383
Net Income (Loss) Attributable to Parent	$ 15,418	$ 33,404	$ 34,626	$ 31,399	$ 66,190	$ 66,497	$ 63,734	$ 61,064	$ 114,847	$ 257,485	$ 242,811
Earnings Per Share, Basic	$ 0.36	$ 0.79	$ 0.81	$ 0.72	$ 1.51	$ 1.51	$ 1.43	$ 1.36	$ 2.69	$ 5.80	$ 5.31
Earnings Per Share, Diluted	$ 0.36	$ 0.78	$ 0.81	$ 0.72	$ 1.51	$ 1.50	$ 1.42	$ 1.35	$ 2.68	$ 5.77	$ 5.28
Weighted Average Number of Shares Outstanding, Basic	42,355	42,517	42,790	43,340	43,742	44,152	44,660	44,908	42,747	44,362	45,692
Weighted Average Number of Shares Outstanding, Diluted	42,518	42,685	42,959	43,466	43,927	44,381	44,910	45,182	42,908	44,600	45,994