Core Laboratories (CLB) 10-Q 26 Jul 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Jul. 25, 2017
Document and 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-Q
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		44,138,104

Consolidated Balance Sheets Sta

Consolidated Balance Sheets Statement - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 14,318	$ 14,764
Accounts receivable, net of allowance for doubtful accounts of $2,905 and $3,139 at 2017 and 2016, respectively	128,983	114,329
Inventories	35,598	33,720
Prepaid expenses	11,353	10,711
Income taxes receivable	9,067	6,426
Other current assets	6,903	6,511
TOTAL CURRENT ASSETS	206,222	186,461
PROPERTY, PLANT AND EQUIPMENT, net	125,746	129,882
INTANGIBLES, net	9,705	9,936
GOODWILL	179,044	179,044
DEFERRED TAX ASSETS, net	13,748	20,605
OTHER ASSETS	49,293	47,124
TOTAL ASSETS	583,758	573,052
CURRENT LIABILITIES:
Accounts payable	41,607	33,720
Accrued payroll and related costs	22,817	19,411
Taxes other than payroll and income	7,318	5,816
Unearned revenue	17,046	15,690
Income taxes payable	943	15,718
Other current liabilities	11,075	13,668
TOTAL CURRENT LIABILITIES	100,806	104,023
LONG-TERM DEBT, net	233,739	216,488
DEFERRED COMPENSATION	49,308	46,251
DEFERRED TAX LIABILITIES, net	6,146	6,277
OTHER LONG-TERM LIABILITIES	42,307	44,716
COMMITMENTS AND CONTINGENCIES (Note 6)
Preference shares, EUR 0.02 par value; 6,000,000 shares authorized, none issued or outstanding	0	0
Common shares, EUR 0.02 par value; 200,000,000 shares authorized, 44,796,252 issued and 44,128,235 outstanding at 2017 and 44,796,252 issued and 44,151,261 outstanding at 2016	1,148	1,148
Additional paid-in capital	59,043	52,850
Retained earnings	179,631	187,957
Accumulated other comprehensive income (loss)	(9,621)	(9,828)
Treasury shares (at cost), 668,017 at 2017 and 644,991 at 2016	(82,708)	(80,773)
Total Core Laboratories N.V. shareholders' equity	147,493	151,354
Non-controlling interest	3,959	3,943
TOTAL EQUITY	151,452	155,297
TOTAL LIABILITIES AND EQUITY	$ 583,758	$ 573,052

Consolidated Balance Sheets Bal

Consolidated Balance Sheets Balance Sheet Parenthetical $ in Thousands	Jun. 30, 2017USD ($)shares	Jun. 30, 2017€ / shares	Dec. 31, 2016USD ($)shares	Dec. 31, 2016€ / shares
Allowance for Doubtful Accounts Receivable, Current | $	$ 2,905		$ 3,139
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	44,796,252		44,796,252
Common Stock, Shares, Outstanding	44,128,235		44,151,261
Treasury Stock, Shares	668,017		644,991
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

Consolidated Statements of Oper

Consolidated Statements of Operations Statement - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
REVENUE:
Services	$ 117,239	$ 118,172	$ 238,175	$ 240,942
Product sales	46,664	29,897	83,535	60,774
Total revenue	163,903	148,069	321,710	301,716
OPERATING EXPENSES:
Cost of services, exclusive of depreciation expense shown below	80,431	83,349	164,032	168,643
Cost of product sales, exclusive of depreciation expense shown below	36,687	26,650	67,658	54,170
General and administrative expense, exclusive of depreciation expense shown below	11,100	11,139	23,856	22,189
Depreciation	6,093	6,531	12,295	13,158
Amortization	209	220	434	440
Other (income) expense, net	(24)	(47)	849	(51)
OPERATING INCOME	29,407	20,227	52,586	43,167
Interest expense	2,692	3,021	5,310	6,455
Income before income tax expense	26,715	17,206	47,276	36,712
Income tax expense	4,006	671	6,885	5,060
Net income	22,709	16,535	40,391	31,652
Net income (loss) attributable to non-controlling interest	19	(89)	43	(54)
Net income attributable to Core Laboratories N.V.	$ 22,690	$ 16,624	$ 40,348	$ 31,706
EARNINGS PER SHARE INFORMATION:
Basic earnings per share attributable to Core Laboratories N.V. (in dollars per share)	$ 0.51	$ 0.38	$ 0.91	$ 0.74
Diluted earnings per share attributable to Core Laboratories N.V. (in dollars per share)	0.51	0.38	0.91	0.74
Cash dividends per share (in dollars per share)	$ 0.55	$ 0.55	$ 1.10	$ 1.10
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic	44,164	43,297	44,162	42,839
Diluted	44,374	43,505	44,360	43,008

Consolidated Statement of Other

Consolidated Statement of Other Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net income	$ 22,709	$ 16,535	$ 40,391	$ 31,652
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	(278)	(800)	(197)	(2,420)
Interest rate swap amounts reclassified to interest expense	140	211	307	424
Income taxes on derivatives	48	217	(39)	735
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(90)	(372)	71	(1,261)
Amortization to net income of prior service cost	(19)	(19)	(38)	(38)
Amortization to net income of actuarial loss	110	148	220	296
Income taxes on pension and other postretirement benefit plans	(22)	(32)	(46)	(64)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	69	97	136	194
Other Comprehensive Income (Loss), Net of Tax	(21)	(275)	207	(1,067)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Comprehensive income	22,688	16,260	40,598	30,585
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	19	(89)	43	(54)
Comprehensive income attributable to Core Laboratories N.V.	$ 22,669	$ 16,349	$ 40,555	$ 30,639

Consolidated Statement of Cash

Consolidated Statement of Cash Flows Statement - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 40,391	$ 31,652
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	11,563	11,087
Depreciation and amortization	12,729	13,598
Changes to value of life insurance policies	(48)	(497)
Deferred income taxes	6,766	(1,256)
Other non-cash items	(561)	(1,670)
Changes in assets and liabilities:
Accounts receivable	(14,527)	34,700
Inventories	(1,926)	805
Prepaid expenses and other current assets	(3,675)	(2,344)
Other assets	(1,083)	733
Accounts payable	8,443	(3,826)
Accrued expenses	(12,459)	(6,079)
Increase (Decrease) in Deferred Revenue	1,356	(2,987)
Other long-term liabilities	1,507	(102)
Net cash provided by operating activities	48,476	73,814
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(9,362)	(5,302)
Patents and other intangibles	(203)	(99)
Proceeds from sale of assets	511	539
Premiums on life insurance	(863)	(970)
Net cash used in investing activities	(9,917)	(5,832)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of debt borrowings	(67,000)	(258,676)
Proceeds from debt borrowings	84,000	34,000
Excess tax benefits from stock-based compensation	0	(284)
Non-controlling interest - dividend	(27)	(211)
Payments of Dividends	(48,590)	(46,626)
Repurchase of common shares	(7,388)	(1,112)
Stock Issued During Period, Value, New Issues	0	197,211
Net cash used in financing activities	(39,005)	(75,698)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(446)	(7,716)
CASH AND CASH EQUIVALENTS, beginning of period	14,764	22,494
CASH AND CASH EQUIVALENTS, end of period	$ 14,318	$ 14,778

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The accompanying unaudited consolidated financial statements include the accounts of Core Laboratories N.V. and its subsidiaries for which we have a controlling voting interest and/or a controlling financial interest. These financial statements have been prepared in accordance with United States ("U.S.") generally accepted accounting principles ("GAAP") for interim financial information using the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, these financial statements do not include all of the information and footnote disclosures required by U.S. GAAP and should be read in conjunction with the audited financial statements and the summary of significant accounting policies and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2016 (the " 2016 Annual Report"). Core Laboratories N.V. uses the equity method of accounting for investments in which it has less than a majority interest and over which it does not exercise control but does exert significant influence. We use the cost method to record certain other investments in which we own less than 20% of the outstanding equity and do not exercise control or exert significant influence. Non-controlling interests have been recorded to reflect outside ownership attributable to consolidated subsidiaries that are less than 100% owned. In the opinion of management, all adjustments considered necessary for a fair statement of the results for the interim periods presented have been included in these financial statements. Furthermore, the operating results presented for the three and six months ended June 30, 2017 may not necessarily be indicative of the results that may be expected for the year ending December 31, 2017 . Core Laboratories N.V.'s balance sheet information for the year ended December 31, 2016 was derived from the 2016 audited consolidated financial statements but does not include all disclosures in accordance with U.S. GAAP. Core Lab's continuing efforts to streamline its business has led to a simplification of its reporting structure and as of January 1, 2017, the Company presents its operating results in two reporting segments: Reservoir Description and Production Enhancement. For more detail about our segments, see Note 13 - Segment Reporting . Certain reclassifications were made to prior period amounts in order to conform to the current period presentation. These reclassifications had no impact on the reported net income or cash flows for the three or six months ended June 30, 2016 . References to "Core Lab", the "Company", "we", "our" and similar phrases are used throughout this Quarterly Report on Form 10-Q and relate collectively to Core Laboratories N.V. and its consolidated subsidiaries.

Inventories

Inventories	6 Months Ended
	Jun. 30, 2017
Inventory Disclosure [Abstract]
Inventories	Inventories consisted of the following (in thousands): June 30, December 31, Finished goods $ 22,506 $ 21,635 Parts and materials 11,762 11,185 Work in progress 1,330 900 Total inventories $ 35,598 $ 33,720 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.

Acquisitions (Notes)

Acquisitions (Notes)	6 Months Ended
	Jun. 30, 2017
Acquisitions [Abstract]
Mergers, Acquisitions and Dispositions Disclosures [Text Block]	We had no significant acquisitions during the six months ended June 30, 2017 .

Debt and Capital Lease Obligati

Debt and Capital Lease Obligations	6 Months Ended
	Jun. 30, 2017
Debt and Capital Lease Obligations [Abstract]
Debt and Capital Lease Obligations	We have no capital lease obligations. Debt is as follows (in thousands): June 30, December 31, Senior notes $ 150,000 $ 150,000 Credit facility 85,000 68,000 Total debt 235,000 218,000 Less: Debt issuance costs (1,261 ) (1,512 ) Long-term debt, net $ 233,739 $ 216,488 We have two series of senior notes outstanding with an aggregate principal amount of $150 million ("Senior Notes") issued in a private placement transaction. Series A consists of $75 million in aggregate principal amount of notes that bear interest at a fixed rate of 4.01% and are due in full on September 30, 2021 . Series B consists of $75 million in aggregate principal amount of notes that bear interest at a fixed rate of 4.11% and are due in full on September 30, 2023 . Interest on each series of the Senior Notes is payable semi-annually on March 30 and September 30. We maintain a revolving credit facility ("Credit Facility") that allows for an aggregate borrowing capacity of $400 million . The Credit Facility also provides an option to increase the commitment under the Credit Facility by an additional $50 million to bring the total borrowings available to $450 million if certain prescribed conditions are met by the Company. The Credit Facility bears interest at variable rates from LIBOR plus 1.25% to a maximum of LIBOR plus 2.00% . Any outstanding balance under the Credit Facility is due August 29, 2019 , when the Credit Facility matures. Our available capacity at any point in time is reduced by borrowings outstanding at the time and outstanding letters of credit which totaled $21.7 million at June 30, 2017 , resulting in an available borrowing capacity under the Credit Facility of $293.3 million . In addition to those items under the Credit Facility, we had $13.4 million of outstanding letters of credit and performance guarantees and bonds from other sources as of June 30, 2017 . 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 for a total notional amount of $50 million . See Note 11 - Derivative Instruments and Hedging Activities . The estimated fair value of total debt at June 30, 2017 and December 31, 2016 approximated the book value of total debt. The fair value was estimated using Level 2 inputs by calculating the sum of the discounted future interest and principal payments through the date of maturity.

Pensions and Other Postretireme

Pensions and Other Postretirement Benefits	6 Months Ended
	Jun. 30, 2017
Compensation and Retirement Disclosure [Abstract]
Pensions and Other Postretirement Benefits	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. The pension benefit is based on years of service and final pay or career average pay, depending on when the employee began participating. The benefits earned by the employees are immediately vested. The following table summarizes the components of net periodic pension cost under the Dutch Plan (in thousands): Three Months Ended Six Months Ended June 30, June 30, 2017 2016 2017 2016 Service cost $ 366 $ 375 $ 741 $ 733 Interest cost 268 342 543 669 Expected return on plan assets (228 ) (287 ) (460 ) (562 ) Amortization of prior service cost (19 ) (19 ) (38 ) (38 ) Amortization of actuarial loss 110 148 220 296 Net periodic pension cost $ 497 $ 559 $ 1,006 $ 1,098 During the six months ended June 30, 2017 , we contributed $1.6 million to fund the estimated 2017 premiums on investment contracts held by the Dutch Plan.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	We have been and may from time to time be named as a defendant in legal actions that arise in the ordinary course of business. These include, but are not limited to, employment-related claims and contractual disputes or claims for personal injury or property damage which occur in connection with the provision of our services and products. Management does not currently believe that any of our pending contractual, employment-related, personal injury or property damage claims and disputes will have a material effect on our future results of operations, financial position or cash flow.

Equity

Equity	6 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Equity	During the three months ended June 30, 2017 , we repurchased 58,676 of our common shares for $6.1 million ; included in this total were rights to 3,676 shares valued at $0.4 million surrendered to us pursuant to the terms of a stock-based compensation plan in consideration of the participants' tax burdens that may result from the issuance of common shares under that plan. During the six months ended June 30, 2017 , we repurchased 69,428 of our common shares for $7.4 million ; included in this total were rights to 14,428 shares valued at $1.7 million surrendered to us pursuant to the terms of a stock-based compensation plan in consideration of the participants' tax burdens that may result from the issuance of common shares under that plan. Such common shares, unless canceled, may be reissued for a variety of purposes such as future acquisitions, non-employee director stock awards or employee stock awards. We distributed 11,180 and 46,402 treasury shares upon vesting of stock-based awards during the three and six months ended June 30, 2017 , respectively. In February and May 2017 , we paid quarterly dividends of $0.55 per share of common stock. In addition, on July 6, 2017 , we declared a quarterly dividend of $0.55 per share of common stock for shareholders of record on July 17, 2017 and payable on August 14, 2017 . The following table summarizes our changes in equity for the six months ended June 30, 2017 (in thousands): Common Shares Additional Paid-In Capital Retained Earnings Accumulated Treasury Stock Non-Controlling Interest Total Equity December 31, 2016 $ 1,148 $ 52,850 $ 187,957 $ (9,828 ) $ (80,773 ) $ 3,943 $ 155,297 Adoption of ASU 2016-09 (see note 14) — 84 (84 ) — — — — Stock based-awards — 6,109 — — 5,453 — 11,562 Repurchase of common shares — — — — (7,388 ) — (7,388 ) Dividends paid — — (48,590 ) — — — (48,590 ) Non-controlling interest dividends — — — — — (27 ) (27 ) Amortization of deferred pension costs, net of tax — — — 136 — — 136 Interest rate swaps, net of tax — — — 71 — — 71 Net income — — 40,348 — — 43 40,391 June 30, 2017 $ 1,148 $ 59,043 $ 179,631 $ (9,621 ) $ (82,708 ) $ 3,959 $ 151,452 Accumulated other comprehensive income (loss) consisted of the following (in thousands): June 30, December 31, Prior service cost 572 600 Unrecognized net actuarial loss (9,605 ) (9,769 ) Fair value of derivatives, net of tax (588 ) (659 ) Total accumulated other comprehensive income (loss) $ (9,621 ) $ (9,828 )

Earnings per Share

Earnings per Share	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
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 shares include additional shares in the weighted average share calculations associated with the incremental effect of dilutive restricted stock awards and contingently issuable shares, as determined using the treasury stock method. The following table summarizes the calculation of weighted average common shares outstanding used in the computation of diluted earnings per share (in thousands): Three Months Ended Six Months Ended June 30, June 30, 2017 2016 2017 2016 Weighted average basic common shares outstanding 44,164 43,297 44,162 42,839 Effect of dilutive securities: Performance shares 148 127 143 105 Restricted stock 62 81 55 64 Weighted average diluted common and potential common shares outstanding 44,374 43,505 44,360 43,008

Other (Income) Expense, Net

Other (Income) Expense, Net	6 Months Ended
	Jun. 30, 2017
Other Income and Expenses [Abstract]
Other (Income) Expense, Net	The components of Other (income) expense, net, were as follows (in thousands): Three Months Ended Six Months Ended June 30, June 30, 2017 2016 2017 2016 Sale of assets $ (123 ) $ (122 ) $ (302 ) $ (488 ) Results of non-consolidated subsidiaries (96 ) (136 ) (175 ) (324 ) Foreign exchange 358 433 455 1,212 Rents and royalties (109 ) (98 ) (231 ) (199 ) Severance, compensation and other charges — — 1,145 — Other, net (54 ) (124 ) (43 ) (252 ) Total other (income) expense, net $ (24 ) $ (47 ) $ 849 $ (51 ) Foreign exchange gains and losses are summarized in the following table (in thousands): Three Months Ended Six Months Ended June 30, June 30, (Gains) losses by currency 2017 2016 2017 2016 Angolan Kwanza $ (4 ) $ 43 $ (3 ) $ 505 British Pound (74 ) 247 (55 ) 475 Euro 732 (40 ) 835 170 Mexican Peso 11 114 (28 ) 136 Russian Ruble (141 ) (57 ) (125 ) (93 ) Other currencies, net (166 ) 126 (169 ) 19 Total (gain) loss, net $ 358 $ 433 $ 455 $ 1,212

Income Tax Expense

Income Tax Expense	6 Months Ended
	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income Tax Expense	The effective tax rates for the three months ended June 30, 2017 and 2016 were 15.0% and 3.9% , respectively. The effective tax rates for the six months ended June 30, 2017 and 2016 were 14.6% and 13.8% , respectively. Income tax expense of $4.0 million in the second quarter of 2017 increased by $3.3 million compared to $0.7 million in the same period in 2016 , due to the result of several items discrete to each quarter, along with changes in activity levels in jurisdictions with differing tax rates. In addition, during the second quarter of 2016, we settled a tax audit covering the years 2010 through 2012 that resulted in the release of reserves for uncertain tax positions in the amount of $0.9 million which contributed to the lower effective tax rate in that quarter. On March 29, 2017, the Prime Minister of the United Kingdom ("UK") formally notified the European Council of the UK's intention to withdraw from the European Union ("EU") under Article 50 of the Treaty of Lisbon. The UK's formal withdrawal may impact tax exemptions and reliefs on intra-European transactions between our UK affiliates and EU companies. In addition, it may impact transactions between our UK affiliates and non-EU based companies as EU tax treaties may no longer apply to these transactions. Due to the uncertainty involved in evaluating the effect of the loss of tax exemptions and reliefs, we are unable to estimate the impact of these changes, if any, at this time. We will continue to monitor developments in this area.

Derivative Instruments (Notes)

Derivative Instruments (Notes)	6 Months Ended
	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	11 . DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES We are exposed to market risks related to fluctuations in interest rates. To mitigate these risks, we utilize derivative instruments in the form of interest rate swaps. We do not enter into derivative transactions for speculative purposes. Interest Rate Risk Our Credit Facility bears interest at variable rates from LIBOR plus 1.25% to a maximum of LIBOR plus 2.00% . As a result of two interest rate swap agreements, we are subject to interest rate risk on debt in excess of $50 million drawn on 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 2.5% 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 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 June 30, 2017 , we had fixed rate long-term debt aggregating $200 million and variable rate long-term debt aggregating $35 million , after taking into account the effect of the swaps. The fair values of outstanding derivative instruments are as follows: Fair Value of Derivatives June 30, 2017 December 31, 2016 Balance Sheet Classification Derivatives designated as hedges: 5 year interest rate swap $ 103 $ 211 Other long-term liabilities 10 year interest rate swap 833 835 Other long-term liabilities $ 936 $ 1,046 The fair value of all outstanding derivatives was determined using a model with inputs that are observable in the market (Level 2) or can be derived from or corroborated by observable data. The effect of the interest rate swaps on the Consolidated Statement of Operations was as follows: Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Income Statement Classification Derivatives designated as hedges: 5 year interest rate swap $ 46 $ 81 $ 105 $ 163 Increase to interest expense 10 year interest rate swap 94 130 202 261 Increase to interest expense $ 140 $ 211 $ 307 $ 424

Financial Instruments (Notes)

Financial Instruments (Notes)	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	12 . FINANCIAL INSTRUMENTS 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 using significant other observable inputs (Level 2) with the assistance of a third-party specialist. We do not have any assets or liabilities measured at fair value on a recurring basis using quoted prices in an active market (Level 1) or significant unobservable inputs (Level 3). Gains and losses related to the fair value changes in the deferred compensation assets and liabilities are recorded in General and administrative expense in the Consolidated Statements of Operations. Gains and losses related to the fair value of the interest rate swaps are recorded in Other comprehensive income. The following table summarizes the fair value balances (in thousands): Fair Value Measurement at June 30, 2017 Total Level 1 Level 2 Level 3 Assets: Deferred compensation trust assets (1) $ 26,788 $ — $ 26,788 $ — Liabilities: Deferred compensation plan $ 33,963 $ — $ 33,963 $ — 5 year interest rate swap 103 — 103 — 10 year interest rate swap 833 — 833 — $ 34,899 $ — $ 34,899 $ — Fair Value Measurement at December 31, 2016 Total Level 1 Level 2 Level 3 Assets: Deferred compensation trust assets (1) $ 25,530 $ — $ 25,530 $ — Liabilities: Deferred compensation plan $ 31,672 $ — $ 31,672 $ — 5 year interest rate swap 211 — 211 — 10 year interest rate swap 835 — 835 — $ 32,718 $ — $ 32,718 $ — (1) Trust assets consist of the cash surrender value of life insurance policies and are intended to assist in the funding of the deferred compensation agreements.

Segment Reporting

Segment Reporting	6 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
Segment Reporting	Core Laboratories has taken steps to streamline its business by realigning its reporting structure into two reporting 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. In connection with the realignment of our reporting structure, amounts previously reported in our Reservoir Management segment are now presented within our Reservoir Description and Production Enhancement segments, and prior periods have been revised to conform to the current presentation. • Reservoir Description: Encompasses the characterization of petroleum reservoir rock, fluid and gas samples to increase production and improve recovery of oil and gas from our clients' reservoirs. We provide laboratory based analytical and field services to characterize properties of crude oil and petroleum products to the oil and gas industry. We also provide proprietary and joint industry studies based on these types of analysis. • Production Enhancement: Includes services and products relating to reservoir well completions, perforations, stimulations and production. We provide integrated diagnostic services to evaluate and monitor the effectiveness of well completions and to develop solutions aimed at increasing the effectiveness of enhanced oil recovery projects. Results for these segments are presented below. We use the same accounting policies to prepare our segment results as are used to prepare our Consolidated Financial Statements. All interest and other non-operating income (expense) is attributable to Corporate & Other and is not allocated to specific segments. Summarized financial information concerning our segments is shown in the following table (in thousands): Reservoir Description Production Enhancement Corporate & Other 1 Consolidated Three Months Ended June 30, 2017 Revenue from unaffiliated clients $ 104,313 $ 59,590 $ — $ 163,903 Inter-segment revenue 47 249 (296 ) — Segment operating income (loss) 18,670 10,765 (28 ) 29,407 Total assets (at end of period) 319,433 206,096 58,229 583,758 Capital expenditures 2,098 769 46 2,913 Depreciation and amortization 4,528 1,256 518 6,302 Three Months Ended June 30, 2016 Revenue from unaffiliated clients $ 108,278 $ 39,791 $ — $ 148,069 Inter-segment revenue 304 384 (688 ) — Segment operating income (loss) 20,139 247 (159 ) 20,227 Total assets (at end of period) 323,623 196,339 52,144 572,106 Capital expenditures 2,274 160 10 2,444 Depreciation and amortization 4,631 1,501 619 6,751 Six Months Ended June 30, 2017 Revenue from unaffiliated clients $ 209,208 $ 112,502 $ — $ 321,710 Inter-segment revenue 221 450 (671 ) — Segment operating income (loss) 34,610 18,160 (184 ) 52,586 Total assets 319,433 206,096 58,229 583,758 Capital expenditures 4,675 3,789 898 9,362 Depreciation and amortization 9,148 2,542 1,039 12,729 Six Months Ended June 30, 2016 Revenue from unaffiliated clients $ 215,702 $ 86,014 $ — $ 301,716 Inter-segment revenue 1,046 604 (1,650 ) — Segment operating income (loss) 38,737 4,497 (67 ) 43,167 Total assets 323,623 196,339 52,144 572,106 Capital expenditures 4,356 538 408 5,302 Depreciation and amortization 9,267 3,089 1,242 13,598 (1) "Corporate & Other" represents those items that are not directly related to a particular segment and eliminations.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	6 Months Ended
	Jun. 30, 2017
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	Pronouncements Adopted in 2017 In July 2015, the FASB issued ASU 2015-11 ("Simplifying the Measurement of Inventory") to require the measurement of inventory at the lower of cost and net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. We adopted this standard on January 1, 2017. The adoption of this standard had no effect on our Consolidated Balance Sheets, Consolidated Statements of Operations and Consolidated Statements of Cash Flows. In March 2016, the FASB issued ASU 2016-09 ("Improvements to Employee Share-Based Payment Accounting") to simplify the accounting for share-based payment transactions, including accounting for forfeitures, excess tax benefit/expense, and tax withholding requirements. Under this new guidance, (1) companies have the option to estimate how many shares in a grant will be forfeited or to elect to recognize forfeitures as they occur; (2) all excess tax benefit and expense is recognized as income tax benefit or expense in the income statement as a discrete item to the quarter, and the accumulated benefits in additional paid-in capital ("APIC") are eliminated; and (3) companies are able to withhold share amounts up to the statutory maximum and the award will still be classified as equity. We adopted this standard on January 1, 2017 and have elected to recognize forfeitures as they occur. This resulted in a reclassification between retained earnings and additional paid-in-capital of $84 thousand for the estimated forfeitures on unvested shares as of January 1, 2017. The adoption of this standard will result in periodic adjustments in the recognition of stock compensation expense associated with forfeitures in the period in which they occur. In addition to the income statement treatment of including the excess tax benefit/expense as a discrete income tax item each quarter, this has been removed from the Cash from financing activities section of the Statement of Cash Flows. Pronouncements Not Yet Effective In May 2014, the FASB issued ASU 2014-09 ("Revenue from Contracts with Customers"), which provides guidance on revenue recognition. The core principle of this guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This guidance requires entities to apply a five-step method to (1) identify the contract(s) with customers; (2) identify the performance obligation(s) in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligation(s) in the contract; and (5) recognize revenue when (or as) the entity satisfies a performance obligation. This pronouncement is effective for fiscal years, and interim periods within those years, beginning after December 15, 2017 (on July 9, 2015, the FASB deferred the implementation date for one year). We are currently analyzing the standard's impact on our revenues by looking at all of our revenue streams to determine the impact on our Consolidated Balance Sheets, Consolidated Statements of Operations and Consolidated Statements of Cash Flows. At this point, we do not anticipate any material changes to our revenue recognition policies and procedures nor to our financial statements, but extensive additional disclosures will be required. In February 2016, the FASB issued ASU 2016-02 ("Leases"), which introduces the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous guidance. The new standard establishes a right-of-use ("ROU") model that requires a lessee to record an ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. The new standard is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years with early adoption permitted. We do not anticipate the adoption of this standard to have a material impact on how we currently record lease transactions; however, it may have a significant impact on our Consolidated Balance Sheets, increasing both asset balances and liability balances. In June 2016, the FASB issued ASU 2016-13 ("Measurement of Credit Losses on Financial Instruments") which replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The new standard is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years with early adoption permitted in fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We are evaluating the impact that the adoption of this standard will have on our consolidated financial statements.

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 30, 2017
Inventory Disclosure [Abstract]
Schedule of Inventory, Current [Table Text Block]	June 30, December 31, Finished goods $ 22,506 $ 21,635 Parts and materials 11,762 11,185 Work in progress 1,330 900 Total inventories $ 35,598 $ 33,720

Debt and Capital Lease Obliga22

Debt and Capital Lease Obligations (Tables)	6 Months Ended
	Jun. 30, 2017
Debt and Capital Lease Obligations [Abstract]
Schedule of Long-term Debt Instruments	(in thousands): June 30, December 31, Senior notes $ 150,000 $ 150,000 Credit facility 85,000 68,000 Total debt 235,000 218,000 Less: Debt issuance costs (1,261 ) (1,512 ) Long-term debt, net $ 233,739 $ 216,488

Pensions and Other Postretire23

Pensions and Other Postretirement Benefits (Tables)	6 Months Ended
	Jun. 30, 2017
Compensation and Retirement Disclosure [Abstract]
Schedule of Net Benefit Costs	The following table summarizes the components of net periodic pension cost under the Dutch Plan (in thousands): Three Months Ended Six Months Ended June 30, June 30, 2017 2016 2017 2016 Service cost $ 366 $ 375 $ 741 $ 733 Interest cost 268 342 543 669 Expected return on plan assets (228 ) (287 ) (460 ) (562 ) Amortization of prior service cost (19 ) (19 ) (38 ) (38 ) Amortization of actuarial loss 110 148 220 296 Net periodic pension cost $ 497 $ 559 $ 1,006 $ 1,098

Equity (Tables)

Equity (Tables)	6 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Schedule of Stockholders Equity	The following table summarizes our changes in equity for the six months ended June 30, 2017 (in thousands): Common Shares Additional Paid-In Capital Retained Earnings Accumulated Treasury Stock Non-Controlling Interest Total Equity December 31, 2016 $ 1,148 $ 52,850 $ 187,957 $ (9,828 ) $ (80,773 ) $ 3,943 $ 155,297 Adoption of ASU 2016-09 (see note 14) — 84 (84 ) — — — — Stock based-awards — 6,109 — — 5,453 — 11,562 Repurchase of common shares — — — — (7,388 ) — (7,388 ) Dividends paid — — (48,590 ) — — — (48,590 ) Non-controlling interest dividends — — — — — (27 ) (27 ) Amortization of deferred pension costs, net of tax — — — 136 — — 136 Interest rate swaps, net of tax — — — 71 — — 71 Net income — — 40,348 — — 43 40,391 June 30, 2017 $ 1,148 $ 59,043 $ 179,631 $ (9,621 ) $ (82,708 ) $ 3,959 $ 151,452
Schedule of Accumulated Other Comprehensive Income (Loss)	Accumulated other comprehensive income (loss) consisted of the following (in thousands): June 30, December 31, Prior service cost 572 600 Unrecognized net actuarial loss (9,605 ) (9,769 ) Fair value of derivatives, net of tax (588 ) (659 ) Total accumulated other comprehensive income (loss) $ (9,621 ) $ (9,828 )

Earnings per Share (Tables)

Earnings per Share (Tables)	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Schedule of Weighted Average Number of Shares	The following table summarizes the calculation of weighted average common shares outstanding used in the computation of diluted earnings per share (in thousands): Three Months Ended Six Months Ended June 30, June 30, 2017 2016 2017 2016 Weighted average basic common shares outstanding 44,164 43,297 44,162 42,839 Effect of dilutive securities: Performance shares 148 127 143 105 Restricted stock 62 81 55 64 Weighted average diluted common and potential common shares outstanding 44,374 43,505 44,360 43,008

Other (Income) Expense, Net (Ta

Other (Income) Expense, Net (Tables)	6 Months Ended
	Jun. 30, 2017
Other Income and Expenses [Abstract]
Foreign Currency Gains Losses By Currency	Foreign exchange gains and losses are summarized in the following table (in thousands): Three Months Ended Six Months Ended June 30, June 30, (Gains) losses by currency 2017 2016 2017 2016 Angolan Kwanza $ (4 ) $ 43 $ (3 ) $ 505 British Pound (74 ) 247 (55 ) 475 Euro 732 (40 ) 835 170 Mexican Peso 11 114 (28 ) 136 Russian Ruble (141 ) (57 ) (125 ) (93 ) Other currencies, net (166 ) 126 (169 ) 19 Total (gain) loss, net $ 358 $ 433 $ 455 $ 1,212
Schedule of Other Operating Cost and Expense, by Component	The components of Other (income) expense, net, were as follows (in thousands): Three Months Ended Six Months Ended June 30, June 30, 2017 2016 2017 2016 Sale of assets $ (123 ) $ (122 ) $ (302 ) $ (488 ) Results of non-consolidated subsidiaries (96 ) (136 ) (175 ) (324 ) Foreign exchange 358 433 455 1,212 Rents and royalties (109 ) (98 ) (231 ) (199 ) Severance, compensation and other charges — — 1,145 — Other, net (54 ) (124 ) (43 ) (252 ) Total other (income) expense, net $ (24 ) $ (47 ) $ 849 $ (51 )

Derivative Instruments (Tables)

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2017
Derivatives, Fair Value [Line Items]
Schedule of Derivative Liabilities at Fair Value [Table Text Block]	The fair values of outstanding derivative instruments are as follows: Fair Value of Derivatives June 30, 2017 December 31, 2016 Balance Sheet Classification Derivatives designated as hedges: 5 year interest rate swap $ 103 $ 211 Other long-term liabilities 10 year interest rate swap 833 835 Other long-term liabilities $ 936 $ 1,046

Derivative Instruments Derivati

Derivative Instruments Derivative Instruments Gain Loss Table (Tables)	6 Months Ended
	Jun. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) [Table Text Block]	The effect of the interest rate swaps on the Consolidated Statement of Operations was as follows: Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Income Statement Classification Derivatives designated as hedges: 5 year interest rate swap $ 46 $ 81 $ 105 $ 163 Increase to interest expense 10 year interest rate swap 94 130 202 261 Increase to interest expense $ 140 $ 211 $ 307 $ 424

Financial Instruments (Tables)

Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements [Table Text Block]	Fair Value Measurement at June 30, 2017 Total Level 1 Level 2 Level 3 Assets: Deferred compensation trust assets (1) $ 26,788 $ — $ 26,788 $ — Liabilities: Deferred compensation plan $ 33,963 $ — $ 33,963 $ — 5 year interest rate swap 103 — 103 — 10 year interest rate swap 833 — 833 — $ 34,899 $ — $ 34,899 $ — Fair Value Measurement at December 31, 2016 Total Level 1 Level 2 Level 3 Assets: Deferred compensation trust assets (1) $ 25,530 $ — $ 25,530 $ — Liabilities: Deferred compensation plan $ 31,672 $ — $ 31,672 $ — 5 year interest rate swap 211 — 211 — 10 year interest rate swap 835 — 835 — $ 32,718 $ — $ 32,718 $ — (1) Trust assets consist of the cash surrender value of life insurance policies and are intended to assist in the funding of the deferred compensation agreements.

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Summarized financial information concerning our segments is shown in the following table (in thousands): Reservoir Description Production Enhancement Corporate & Other 1 Consolidated Three Months Ended June 30, 2017 Revenue from unaffiliated clients $ 104,313 $ 59,590 $ — $ 163,903 Inter-segment revenue 47 249 (296 ) — Segment operating income (loss) 18,670 10,765 (28 ) 29,407 Total assets (at end of period) 319,433 206,096 58,229 583,758 Capital expenditures 2,098 769 46 2,913 Depreciation and amortization 4,528 1,256 518 6,302 Three Months Ended June 30, 2016 Revenue from unaffiliated clients $ 108,278 $ 39,791 $ — $ 148,069 Inter-segment revenue 304 384 (688 ) — Segment operating income (loss) 20,139 247 (159 ) 20,227 Total assets (at end of period) 323,623 196,339 52,144 572,106 Capital expenditures 2,274 160 10 2,444 Depreciation and amortization 4,631 1,501 619 6,751 Six Months Ended June 30, 2017 Revenue from unaffiliated clients $ 209,208 $ 112,502 $ — $ 321,710 Inter-segment revenue 221 450 (671 ) — Segment operating income (loss) 34,610 18,160 (184 ) 52,586 Total assets 319,433 206,096 58,229 583,758 Capital expenditures 4,675 3,789 898 9,362 Depreciation and amortization 9,148 2,542 1,039 12,729 Six Months Ended June 30, 2016 Revenue from unaffiliated clients $ 215,702 $ 86,014 $ — $ 301,716 Inter-segment revenue 1,046 604 (1,650 ) — Segment operating income (loss) 38,737 4,497 (67 ) 43,167 Total assets 323,623 196,339 52,144 572,106 Capital expenditures 4,356 538 408 5,302 Depreciation and amortization 9,267 3,089 1,242 13,598

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Finished goods	$ 22,506	$ 21,635
Parts and materials	11,762	11,185
Work in progress	1,330	900
Total inventories	$ 35,598	$ 33,720

Debt and Capital Lease Obliga32

Debt and Capital Lease Obligations (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity	$ 400,000
Line of Credit Facility, Extension Capacity	50,000
Line of credit facility, maximum borrowing capacity	450,000
Performance bonds under credit facility	21,700
Line of credit facility, remaining borrowing capacity	293,300
Performance bonds	13,400
Long-term Debt, Excluding Current Maturities	233,739	$ 216,488
Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt	150,000	150,000
Face amount	150,000
Line of Credit [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 85,000	68,000
Maturity date	Aug. 29, 2019
Senior Notes Series A [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.01%
Face amount	$ 75,000
Maturity date	Sep. 30, 2021
Senior Notes Series B [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.11%
Face amount	$ 75,000
Maturity date	Sep. 30, 2023
Total debt [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount	$ 235,000	218,000
Debt issuance costs [Domain]
Debt Instrument [Line Items]
Debt acquisition costs	$ (1,261)	$ (1,512)
Minimum [Member]
Debt Instrument [Line Items]
Basis Spread on Variable Rate	1.25%
Maximum [Member]
Debt Instrument [Line Items]
Basis Spread on Variable Rate	2.00%
Interest Rate Swap [Member]
Debt Instrument [Line Items]
Derivative, Notional Amount	$ 50,000

Pensions and Other Postretire33

Pensions and Other Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Compensation and Retirement Disclosure [Abstract]
Service cost	$ 366	$ 375	$ 741	$ 733
Interest cost	268	342	543	669
Expected return on plan assets	(228)	(287)	(460)	(562)
Amortization of prior service cost	19	19	38	38
Amortization of actuarial loss	110	148	220	296
Net periodic pension cost	$ 497	$ 559	1,006	$ 1,098
Contributions by employer			$ 1,600

Equity (Narrative) (Details)

Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Equity [Abstract]
Treasury shares, acquired, tax burden	3,676		14,428
Treasury shares, acquired, value, tax burden	$ 400		$ 1,700
Treasury Stock, Shares, Acquired	58,676		69,428
Treasury Stock, Value, Acquired, Cost Method	$ 6,100		$ 7,400
Treasury Stock, Value	$ 82,708		$ 82,708		$ 80,773
Stock Issued During Period, Shares, Treasury Stock Reissued	11,180		46,402
Cash dividends per share (in dollars per share)	$ 0.55	$ 0.55	$ 1.10	$ 1.10
Dividends declared (in dollars per share)	$ 0.55

Equity (Details)

Equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification			$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			155,297
Stock based-awards			11,562
Repurchase of common shares			(7,388)
Dividends paid			(48,590)
Non-controlling interest dividends			(27)
Amortization of deferred pension costs, net of tax			136
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	$ (90)	$ (372)	71	$ (1,261)
Net income	22,709	16,535	40,391	31,652
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	19	$ (89)	43	$ (54)
Ending balance	151,452		151,452
Common Shares [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification			0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			1,148
Stock based-awards			0
Repurchase of common shares			0
Dividends paid			0
Non-controlling interest dividends			0
Amortization of deferred pension costs, net of tax			0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax			0
Net income			0
Ending balance	1,148		1,148
Additional Paid-In Capital [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification			84
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			52,850
Stock based-awards			6,109
Repurchase of common shares			0
Dividends paid			0
Non-controlling interest dividends			0
Amortization of deferred pension costs, net of tax			0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax			0
Net income			0
Ending balance	59,043		59,043
Retained Earnings [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification			(84)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			187,957
Stock based-awards			0
Repurchase of common shares			0
Dividends paid			(48,590)
Non-controlling interest dividends			0
Amortization of deferred pension costs, net of tax			0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax			0
Net income			40,348
Ending balance	179,631		179,631
Accumulated Other Comprehensive Income (Loss) [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification			0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(9,828)
Stock based-awards			0
Repurchase of common shares			0
Dividends paid			0
Non-controlling interest dividends			0
Amortization of deferred pension costs, net of tax			136
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax			71
Net income			0
Ending balance	(9,621)		(9,621)
Treasury Stock [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification			0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(80,773)
Stock based-awards			5,453
Repurchase of common shares			(7,388)
Dividends paid			0
Non-controlling interest dividends			0
Amortization of deferred pension costs, net of tax			0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax			0
Net income			0
Ending balance	(82,708)		(82,708)
Non-Controlling Interests [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification			0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			3,943
Stock based-awards			0
Repurchase of common shares			0
Dividends paid			0
Non-controlling interest dividends			(27)
Amortization of deferred pension costs, net of tax			0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax			0
Ending balance	$ 3,959		$ 3,959

Equity (Comprehensive Income) (

Equity (Comprehensive Income) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Equity [Abstract]
Prior service cost	$ 572	$ 600
Unrecognized net actuarial loss	(9,605)	(9,769)
Derivative, Fair Value, Net	(588)	(659)
Total accumulated other comprehensive income (loss)	$ (9,621)	$ (9,828)

Earnings per Share (Details)

Earnings per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Weighted average basic common shares outstanding	44,164	43,297	44,162	42,839
Performance shares (in shares)	148	127	143	105
Restricted stock (in shares)	62	81	55	64
Weighted average diluted common and potential common shares outstanding	44,374	43,505	44,360	43,008

Other (Income) Expense, Net (De

Other (Income) Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement Location [Line Items]
Other Nonoperating Income (Expense)	$ (24)	$ (47)	$ 849	$ (51)
Total other (income) expense, net	(24)	(47)	849	(51)
Other Income [Member]
Income Statement Location [Line Items]
Other Nonoperating Income (Expense)	(54)	(124)	(43)	(252)
Rents and Royalties Income (Loss) [Member]
Income Statement Location [Line Items]
Other Nonoperating Income (Expense)	(109)	(98)	(231)	(199)
Severance and other charges [Member]
Income Statement Location [Line Items]
Other Nonoperating Income (Expense)	0	0	1,145	0
Investment Income [Member]
Income Statement Location [Line Items]
Other Nonoperating Income (Expense)	(96)	(136)	(175)	(324)
gain loss on sale of asset [Member]
Income Statement Location [Line Items]
Other Nonoperating Income (Expense)	(123)	(122)	(302)	(488)
Foreign Currency Gain (Loss) [Member]
Income Statement Location [Line Items]
Other Nonoperating Income (Expense)	$ 358	$ 433	$ 455	$ 1,212

Other (Income) Expense, Net (Fo

Other (Income) Expense, Net (Foreign Currency (Gain ) Loss by Currency) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Other Nonoperating Income (Expense)	$ 24	$ 47	$ (849)	$ 51
Foreign exchange	358	433	455	1,212
Angola, Kwanza
Foreign exchange	(4)	43	(3)	505
British Pound [Member]
Foreign exchange	(74)	247	(55)	475
Euro [Member]
Foreign exchange	732	(40)	835	170
Mexican Peso [Member]
Foreign exchange	11	114	(28)	136
Russian Ruble [Member]
Foreign exchange	(141)	(57)	(125)	(93)
Other Currencies Net [Member]
Foreign exchange	$ (166)	$ 126	$ (169)	$ 19

Income Tax Expense (Details)

Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Tax Contingency [Line Items]
Release of reserves for uncertain tax positions		$ 900
Change in income tax expense	$ 3,300
Effective income tax rate	15.00%	3.90%	14.60%	13.80%
Income tax expense	$ 4,006	$ 671	$ 6,885	$ 5,060

Derivative Instruments (Details

Derivative Instruments (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$ 936	$ 1,046
Derivative, Notional Amount	50,000
Interest Rate Swap No. 1 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	833	835
Derivative, Notional Amount	$ 25,000
Derivative, Fixed Interest Rate	2.50%
Derivative, Maturity Date	Aug. 29, 2024
Interest Rate Swap No. 2 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$ 103	211
Derivative, Notional Amount	$ 25,000
Derivative, Fixed Interest Rate	1.73%
Derivative, Maturity Date	Aug. 29, 2019
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap No. 1 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$ 833	835
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap No. 2 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$ 103	$ 211

Derivative Instruments Long-ter

Derivative Instruments Long-term debt (Details) $ in Millions	Jun. 30, 2017USD ($)
Debt Disclosure in Derivatives Footnote [Abstract]
Long-term Debt, Percentage Bearing Variable Interest, Amount	$ 35
Long-term Debt, Percentage Bearing Fixed Interest, Amount	$ 200

Derivative Instruments Deriva43

Derivative Instruments Derivative gain loss table (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	$ 140	$ 211	$ 307	$ 424
Interest Rate Swap No. 1 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	94	130	202	261
Interest Rate Swap No. 2 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	$ 46	$ 81	$ 105	$ 163

Financial Instruments FInancial

Financial Instruments FInancial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 26,788	$ 25,530
Deferred Compensation Liability, Current and Noncurrent	33,963	31,672
Financial and Nonfinancial Liabilities, Fair Value Disclosure	34,899	32,718
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	26,788	25,530
Deferred Compensation Liability, Current and Noncurrent	33,963	31,672
Financial and Nonfinancial Liabilities, Fair Value Disclosure	34,899	32,718
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Interest Rate Swap No. 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	103	211
Interest Rate Swap No. 2 [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	0	0
Interest Rate Swap No. 2 [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	103	211
Interest Rate Swap No. 2 [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	0	0
Interest Rate Swap No. 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	833	835
Interest Rate Swap No. 1 [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	0	0
Interest Rate Swap No. 1 [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	833	835
Interest Rate Swap No. 1 [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$ 0	$ 0

Segment Reporting (Details)

Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenue from unaffiliated clients	$ 163,903	$ 148,069	$ 321,710	$ 301,716
Inter-segment revenue	0	0	0	0
Segment operating income (loss)	29,407	20,227	52,586	43,167
Total assets (at end of period)	583,758	572,106	583,758	572,106	$ 573,052
Capital expenditures	2,913	2,444	9,362	5,302
Depreciation and amortization	6,302	6,751	12,729	13,598
Operating Segments [Member] | Reservoir Description [Member]
Segment Reporting Information [Line Items]
Revenue from unaffiliated clients	104,313	108,278	209,208	215,702
Inter-segment revenue	47	304	221	1,046
Segment operating income (loss)	18,670	20,139	34,610	38,737
Total assets (at end of period)	319,433	323,623	319,433	323,623
Capital expenditures	2,098	2,274	4,675	4,356
Depreciation and amortization	4,528	4,631	9,148	9,267
Operating Segments [Member] | Production Enhancement [Member]
Segment Reporting Information [Line Items]
Revenue from unaffiliated clients	59,590	39,791	112,502	86,014
Inter-segment revenue	249	384	450	604
Segment operating income (loss)	10,765	247	18,160	4,497
Total assets (at end of period)	206,096	196,339	206,096	196,339
Capital expenditures	769	160	3,789	538
Depreciation and amortization	1,256	1,501	2,542	3,089
Corporate & Other [Member]
Segment Reporting Information [Line Items]
Revenue from unaffiliated clients	0	0	0	0
Inter-segment revenue	(296)	(688)	(671)	(1,650)
Segment operating income (loss)	(28)	(159)	(184)	(67)
Total assets (at end of period)	58,229	52,144	58,229	52,144
Capital expenditures	46	10	898	408
Depreciation and amortization	$ 518	$ 619	$ 1,039	$ 1,242