Core Laboratories (CLB) 10-Q 22 Jul 16 2016 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Jul. 21, 2016
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, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		44,106,302

Consolidated Balance Sheets Sta

Consolidated Balance Sheets Statement - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 14,778	$ 22,494
Accounts receivable, net of allowance for doubtful accounts of $2,940 and $4,136 at 2016 and 2015, respectively	111,752	145,689
Inventories	39,818	40,906
Prepaid expenses	10,912	12,053
Income taxes receivable	10,893	7,209
Other current assets	6,832	10,196
TOTAL CURRENT ASSETS	194,985	238,547
PROPERTY, PLANT AND EQUIPMENT, net	135,060	143,211
INTANGIBLES, net	9,700	10,041
GOODWILL	178,159	178,159
DEFERRED TAX ASSETS, net	9,537	11,693
OTHER ASSETS	44,665	43,607
TOTAL ASSETS	572,106	625,258
CURRENT LIABILITIES:
Accounts payable	29,404	33,474
Accrued payroll and related costs	34,512	36,475
Taxes other than payroll and income	6,714	9,495
Unearned revenue	11,114	14,101
Income taxes payable	1,352	1,733
Other current liabilities	13,119	25,480
TOTAL CURRENT LIABILITIES	96,215	120,758
LONG-TERM DEBT, net	208,237	430,987
DEFERRED COMPENSATION	43,570	43,478
DEFERRED TAX LIABILITIES, net	7,982	4,881
OTHER LONG-TERM LIABILITIES	49,151	48,853
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, 46,046,252 issued and 44,095,883 outstanding at 2016 and 44,350,002 issued and 42,375,905 outstanding at 2015	1,180	1,142
Additional paid-in capital	203,377	0
Retained earnings	204,287	219,207
Accumulated other comprehensive income (loss)	(11,605)	(10,538)
Treasury shares (at cost), 1,950,369 at 2016 and 1,974,097 at 2015	(235,388)	(238,875)
Total Core Laboratories N.V. shareholders' equity (deficit)	161,851	(29,064)
Non-controlling interest	5,100	5,365
TOTAL EQUITY (DEFICIT)	166,951	(23,699)
TOTAL LIABILITIES AND EQUITY (DEFICIT)	$ 572,106	$ 625,258

Consolidated Balance Sheets Bal

Consolidated Balance Sheets Balance Sheet Parenthetical $ in Thousands	Jun. 30, 2016USD ($)shares	Jun. 30, 2016€ / shares	Dec. 31, 2015USD ($)shares	Dec. 31, 2015€ / shares
Allowance for Doubtful Accounts Receivable, Current | $	$ 2,940		$ 4,136
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	46,046,252		44,350,002
Common Stock, Shares, Outstanding	44,095,883		42,375,905
Treasury Stock, Shares	1,950,369		1,974,097
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, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
REVENUE:
Services	$ 118,172	$ 156,861	$ 240,942	$ 319,835
Product sales	29,897	47,028	60,774	97,697
Total revenue	148,069	203,889	301,716	417,532
OPERATING EXPENSES:
Cost of services, exclusive of depreciation expense shown below	83,349	98,462	168,643	201,257
Cost of product sales, exclusive of depreciation expense shown below	26,650	36,157	54,170	77,636
General and administrative expense, exclusive of depreciation expense shown below	11,139	12,634	22,189	25,308
Depreciation	6,531	6,752	13,158	13,097
Amortization	220	178	440	399
Other (income) expense, net	(47)	1,813	(51)	2,135
Severance and other charges			0	7,090
OPERATING INCOME	20,227	47,893	43,167	90,610
Interest expense	3,021	3,116	6,455	5,519
Income before income tax expense	17,206	44,777	36,712	85,091
Income tax expense	671	10,075	5,060	19,347
Net income	16,535	34,702	31,652	65,744
Net income (loss) attributable to non-controlling interest	(89)	76	(54)	(281)
Net income attributable to Core Laboratories N.V.	$ 16,624	$ 34,626	$ 31,706	$ 66,025
EARNINGS PER SHARE INFORMATION:
Basic earnings per share attributable to Core Laboratories N.V. (in dollars per share)	$ 0.38	$ 0.81	$ 0.74	$ 1.53
Diluted earnings per share attributable to Core Laboratories N.V. (in dollars per share)	0.38	0.81	0.74	1.53
Cash dividends per share (in dollars per share)	$ 0.55	$ 0.55	$ 1.10	$ 1.10
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic	43,297	42,790	42,839	43,063
Diluted	43,505	42,959	43,008	43,214

Consolidated Statement of Other

Consolidated Statement of Other Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net income	$ 16,535	$ 34,702	$ 31,652	$ 65,744
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	(800)	735	(2,420)	(405)
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion	211	245	424	488
Income taxes on derivatives	217	367	735	367
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(372)	1,347	(1,261)	450
Amortization to net income of transition asset	0	(22)	0	(44)
Amortization to net income of prior service cost	(19)	(19)	(38)	(38)
Amortization to net income of actuarial loss	148	184	296	367
Income taxes on pension and other postretirement benefit plans	(32)	(36)	(64)	(73)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	97	107	194	212
Other Comprehensive Income (Loss), Net of Tax	(275)	1,454	(1,067)	662
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Comprehensive income	16,260	36,156	30,585	66,406
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	(89)	76	(54)	(281)
Comprehensive income attributable to Core Laboratories N.V.	$ 16,349	$ 36,080	$ 30,639	$ 66,687

Consolidated Statement of Cash

Consolidated Statement of Cash Flows Statement - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 31,652	$ 65,744
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	11,087	10,477
Depreciation and amortization	13,598	13,496
Changes to value of life insurance policies	(497)	(657)
Deferred income taxes	(1,256)	2,534
Other non-cash items	(1,670)	1,415
Changes in assets and liabilities:
Accounts receivable	34,700	41,359
Inventories	805	(4,045)
Prepaid expenses and other current assets	(2,344)	(3,078)
Other assets	733	1,752
Accounts payable	(3,826)	(4,594)
Accrued expenses	(6,079)	(100)
Increase (Decrease) in Deferred Revenue	(2,987)	3,749
Other long-term liabilities	(102)	(1,760)
Net cash provided by operating activities	73,814	126,292
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(5,302)	(12,310)
Patents and other intangibles	(99)	(512)
Business acquisition, net of cash acquired	0	(13,824)
Proceeds from sale of assets	539	833
Premiums on life insurance	(970)	(1,564)
Net cash used in investing activities	(5,832)	(27,377)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of debt borrowings	(258,676)	(27,000)
Proceeds from debt borrowings	34,000	91,000
Excess tax benefits from stock-based compensation	(284)	(315)
Debt financing costs	0	(279)
Non-controlling interest - dividend	(211)	0
Payments of Dividends	(46,626)	(47,508)
Repurchase of common shares	(1,112)	(115,583)
Proceeds from Issuance or Sale of Equity	197,211	0
Net cash used in financing activities	(75,698)	(99,685)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(7,716)	(770)
CASH AND CASH EQUIVALENTS, beginning of period	22,494	23,350
CASH AND CASH EQUIVALENTS, end of period	$ 14,778	$ 22,580

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2016
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, 2015 (the " 2015 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, 2016 may not necessarily be indicative of the results that may be expected for the year ending December 31, 2016 . Core Laboratories N.V.'s balance sheet information for the year ended December 31, 2015 was derived from the 2015 audited consolidated financial statements but does not include all disclosures in accordance with U.S. GAAP. 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, 2016
Inventory Disclosure [Abstract]
Inventories	Inventories consist of the following (in thousands): June 30, December 31, Finished goods $ 25,097 $ 25,778 Parts and materials 13,055 12,637 Work in progress 1,666 2,491 Total inventories $ 39,818 $ 40,906 We include freight costs incurred for shipping inventory to customers in the Cost of product sales line of the Consolidated Statements of Operations.

Acquisitions (Notes)

Acquisitions (Notes)	6 Months Ended
	Jun. 30, 2016
Acquisitions [Abstract]
Mergers, Acquisitions and Dispositions Disclosures [Text Block]	In the second quarter of 2015, we acquired a business providing additional reservoir fluids technology for $17.2 million in cash. We 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 of this entity did not have a material impact on our Consolidated Balance Sheet or Consolidated Statements of Operations, and was recorded in the Reservoir Description business segment.

Debt and Capital Lease Obligati

Debt and Capital Lease Obligations	6 Months Ended
	Jun. 30, 2016
Debt and Capital Lease Obligations [Abstract]
Debt and Capital Lease Obligations	We have no capital lease obligations. Long-term debt is summarized in the following table (in thousands): June 30, December 31, Senior notes $ 150,000 $ 150,000 Credit facility 60,000 283,000 Other indebtedness 567 2,244 Total debt 210,567 435,244 Less: Short-term debt included in other indebtedness (567 ) (2,244 ) Less: Debt issuance costs (1,763 ) (2,013 ) Long-term debt, net $ 208,237 $ 430,987 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% . On May 17, 2016 we completed a public offering of 1,475,000 shares of our common stock. The purchase price paid by the underwriter was $116.67 per share. On May 26, 2016 , the underwriters exercised in full their option to purchase an additional 221,250 shares of common stock at the public offering price of $116.67 per share. The net proceeds from these issuances of common stock were approximately $197.2 million , after deducting underwriting discounts and offering expenses. The proceeds were used to repay a portion of the outstanding borrowings under our Credit Facility. At June 30, 2016 , the outstanding balance on our Credit Facility was $60 million . 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 $25.2 million at June 30, 2016 , resulting in an available borrowing capacity under the Credit Facility of $314.8 million . In addition to those items under the Credit Facility, we had $10 million of outstanding letters of credit and performance guarantees and bonds from other sources as of June 30, 2016 . 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 12 - Derivative Instruments and Hedging Activities . The estimated fair value of total debt at June 30, 2016 and December 31, 2015 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, 2016
Compensation and Retirement Disclosure [Abstract]
Pensions and Other Postretirement Benefits	Defined Benefit Plan We provide a non-contributory defined benefit pension plan for substantially all of our Dutch employees ("Dutch Plan") who were hired prior to 2007. 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 for the three and six months ended June 30, 2016 and 2015 (in thousands): Three Months Ended Six Months Ended June 30, June 30, 2016 2015 2016 2015 Service cost $ 375 $ 440 $ 733 $ 903 Interest cost 342 294 669 603 Expected return on plan assets (287 ) (243 ) (562 ) (499 ) Amortization of transition asset — (22 ) — (44 ) Amortization of prior service cost (19 ) (19 ) (38 ) (38 ) Amortization of actuarial loss 148 184 296 367 Net periodic pension cost $ 559 $ 634 $ 1,098 $ 1,292 During the six months ended June 30, 2016 , we contributed approximately $1.1 million to fund the estimated 2016 premiums on investment contracts held by the Dutch Plan.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2016
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, 2016
Equity [Abstract]
Equity	During the three months ended June 30, 2016 , we repurchased 3,799 of our common shares for $0.4 million . During the six months ended June 30, 2016 , we repurchased 10,164 of our common shares for $1.1 million . These consisted of rights to shares that were surrendered to us pursuant to the terms of a stock-based compensation plan in consideration of the participants' tax burdens that may result from the issuance of common shares under that plan. Such common shares, unless canceled, may be reissued for a variety of purposes such as future acquisitions, non-employee director stock awards or employee stock awards. We distributed 11,736 and 33,892 treasury shares upon vesting of stock-based awards during the three and six months ended June 30, 2016 , respectively. In February and May 2016 , we paid quarterly dividends of $0.55 per share of common stock. In addition, on July 7, 2016 , we declared a quarterly dividend of $0.55 per share of common stock for shareholders of record on July 18, 2016 and payable on August 15, 2016 . On May 17, 2016 we completed a public offering of 1,475,000 shares of our common stock. The purchase price paid by the underwriter was $116.67 per share. On May 26, 2016 , the underwriters exercised in full their option to purchase an additional 221,250 shares of common stock at the public offering price of $116.67 per share. The net proceeds from these issuances of common stock were approximately $197.2 million , after deducting underwriting discounts and offering expenses. The proceeds were used to repay a portion of the outstanding borrowings under our Credit Facility. At the annual meeting of shareholders on May 19, 2016 , our shareholders approved the cancellation of 1,250,000 shares of our common stock then held as treasury stock. This treasury stock will be cancelled on or about August 2, 2016 , after the expiration of the waiting period required under Dutch law. In accordance with ASC 505-30-30-8, we will charge the excess of the cost of the treasury stock over its par value to additional paid-in capital. The following table summarizes our changes in equity for the six months ended June 30, 2016 (in thousands): Shares Outstanding Common Shares Additional Paid-In Capital Retained Earnings Accumulated Treasury Stock Non-Controlling Interest Total Equity December 31, 2015 42,375,905 $ 1,142 $ — $ 219,207 $ (10,538 ) $ (238,875 ) $ 5,365 $ (23,699 ) Stock based-awards 33,892 — 6,488 — — 4,599 — 11,087 Tax detriment of stock-based awards — — (284 ) — — — — (284 ) Repurchase of common shares (10,164 ) — — — — (1,112 ) — (1,112 ) Issuance of common shares 1,696,250 38 197,173 — — — — 197,211 Dividends paid — — — (46,626 ) — — — (46,626 ) Non-controlling interest dividends — — — — — — (211 ) (211 ) Amortization of deferred pension costs, net of tax — — — — 194 — — 194 Interest rate swaps, net of tax — — — — (1,261 ) — — (1,261 ) Net income — — — 31,706 — — (54 ) 31,652 June 30, 2016 44,095,883 $ 1,180 $ 203,377 $ 204,287 $ (11,605 ) $ (235,388 ) $ 5,100 $ 166,951 Accumulated other comprehensive income (loss) consisted of the following (in thousands, net of tax): June 30, December 31, Prior service cost $ 632 $ 661 Unrecognized net actuarial loss (9,978 ) (10,201 ) Fair value of derivatives (2,259 ) (998 ) Total accumulated other comprehensive income (loss) $ (11,605 ) $ (10,538 )

Earnings per Share

Earnings per Share	6 Months Ended
	Jun. 30, 2016
Earnings Per Share [Abstract]
Earnings per Share	We compute basic earnings per common share by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. Diluted earnings per common and potential common shares include additional shares in the weighted average share calculations associated with the incremental effect of dilutive restricted stock awards and contingently issuable shares, as determined using the treasury stock method. The following table summarizes the calculation of weighted average common shares outstanding used in the computation of diluted earnings per share (in thousands): Three Months Ended Six Months Ended June 30, June 30, 2016 2015 2016 2015 Weighted average basic common shares outstanding 43,297 42,790 42,839 43,063 Effect of dilutive securities: Performance shares 127 104 105 86 Restricted stock 81 65 64 65 Weighted average diluted common and potential common shares outstanding 43,505 42,959 43,008 43,214

Other (Income) Expense, Net

Other (Income) Expense, Net	6 Months Ended
	Jun. 30, 2016
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, 2016 2015 2016 2015 Sale of assets $ (122 ) $ (127 ) $ (488 ) $ (262 ) Results of non-consolidated subsidiaries (136 ) (36 ) (324 ) (80 ) Foreign exchange 433 1,002 1,212 1,842 Rents and royalties (98 ) (119 ) (199 ) (255 ) Other, net (124 ) 1,093 (252 ) 890 Total other (income) expense, net $ (47 ) $ 1,813 $ (51 ) $ 2,135 Foreign exchange (gain) loss, net by currency is summarized in the following table (in thousands): Three Months Ended Six Months Ended June 30, June 30, 2016 2015 2016 2015 Angolan Kwanza $ 43 $ 372 $ 505 $ 508 British Pound 247 (262 ) 475 112 Canadian Dollar (47 ) (51 ) (48 ) 1,223 Euro (40 ) 295 170 (760 ) Nigerian Naira 148 180 158 319 Other currencies, net 82 468 (48 ) 440 Total (gain) loss, net $ 433 $ 1,002 $ 1,212 $ 1,842

Income Tax Expense

Income Tax Expense	6 Months Ended
	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Income Tax Expense	The effective tax rate for the three months ended June 30, 2016 was 3.9% compared to 22.5% for the three months ended June 30, 2015 . The effective tax rate for the six months ended June 30, 2016 was 13.8% compared to 22.7% for the same period in 2015. Income tax expense of $0.7 million in the second quarter of 2016 decreased by $9.4 million compared to $10.1 million in the same period in 2015 , primarily in the United States as taxable income recognized in the United States decreased by $68.8 million in 2016 compared to 2015 . No other jurisdiction in which we operate had a material change in income tax expense. 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 the quarter.

Severance and Other Charges (No

Severance and Other Charges (Notes)	6 Months Ended
	Jun. 30, 2016
Other Income and Expenses [Abstract]
Other Income and Other Expense Disclosure [Text Block]	11 . SEVERANCE AND OTHER CHARGES In 2015, in response to reduced spending by our clients on their oil and gas fields as a result of lower commodity prices for crude oil and natural gas, 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 in 2015, of which $7.1 million was recorded during the six months ended June 30, 2015. Approximately $1.5 million was accrued and remaining to be paid at June 30, 2016 . During the second quarter of 2016 , we continued to closely monitor rig counts, crude oil and natural gas prices, and activity levels within the industry. We continued to execute our cost reduction initiative which began in the first quarter of 2015, but no additional expenses associated with severance or asset impairments were recorded during the three or six months ended June 30, 2016 .

Derivative Instruments (Notes)

Derivative Instruments (Notes)	6 Months Ended
	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	12 . 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. 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 June 30, 2016 , we had fixed rate long-term debt aggregating $200 million and variable rate long-term debt aggregating $10 million , after taking into account the effect of the swaps. The fair values of outstanding derivative instruments are as follows (in thousands): Fair Value of Derivatives June 30, 2016 December 31, 2015 Balance Sheet Classification Derivatives designated as hedges: 5 year interest rate swap $ 851 $ 353 Other long-term liabilities 10 year interest rate swap 2,727 1,229 Other long-term liabilities $ 3,578 $ 1,582 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 (in thousands): Three Months Ended Six Months Ended June 30, 2016 June 30, 2015 June 30, 2016 June 30, 2015 Income Statement Classification Derivatives designated as hedges: 5 year interest rate swap $ 81 $ 98 $ 163 $ 195 Increase to interest expense 10 year interest rate swap 130 147 261 293 Increase to interest expense $ 211 $ 245 $ 424 $ 488

Financial Instruments (Notes)

Financial Instruments (Notes)	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	13 . FINANCIAL INSTRUMENTS The Company's only financial assets and liabilities which involve fair value measures relate to certain aspects of the Company's benefit plans and our derivative instruments. We use the market approach to value certain assets and liabilities at fair value using significant other observable inputs (Level 2) with the assistance of a third party specialist. We do not have any assets or liabilities measured at fair value on a recurring basis using quoted prices in an active market (Level 1) or significant unobservable inputs (Level 3). Gains and losses related to the fair value changes in the deferred compensation assets and liabilities are recorded in General and administrative expense in the Consolidated Statements of Operations. Gains and losses related to the fair value of the interest rate swaps are recorded in Other comprehensive income (loss). The following table summarizes the fair value balances (in thousands): Fair Value Measurement at June 30, 2016 Total Level 1 Level 2 Level 3 Assets: Deferred compensation trust assets (1) $ 23,176 $ — $ 23,176 $ — Liabilities: Deferred compensation plan $ 28,772 $ — $ 28,772 $ — 5 year interest rate swap 851 — 851 — 10 year interest rate swap 2,727 — 2,727 — $ 32,350 $ — $ 32,350 $ — 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 $ — (1) Trust assets consist of the cash surrender value of life insurance policies intended to assist in the funding of the deferred compensation plan and are included in Other assets in the Balance Sheet.

Segment Reporting

Segment Reporting	6 Months Ended
	Jun. 30, 2016
Segment Reporting [Abstract]
Segment Reporting	We operate our business in three reportable segments. These complementary segments provide different services and products and utilize different technologies for improving reservoir performance and increasing oil and gas recovery from new and existing fields. • Reservoir Description: Encompasses the characterization of petroleum reservoir rock, fluid and gas samples. We provide analytical and field services to characterize properties of crude oil and petroleum products to the oil and gas industry. • Production Enhancement: Includes services and products relating to reservoir well completions, perforations, stimulations and production. We provide integrated services to evaluate the effectiveness of well completions and to develop solutions aimed at increasing the effectiveness of enhanced oil recovery projects. • Reservoir Management: Combines and integrates information from reservoir description and production enhancement services to increase production and improve recovery of oil and gas from our clients' reservoirs. Results for these segments are presented below. We use the same accounting policies to prepare our segment results as are used to prepare our Consolidated Financial Statements. All interest and other non-operating income (expense) is attributable to 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 Reservoir Management Corporate & Other 1 Consolidated Three Months Ended June 30, 2016 Revenue from unaffiliated clients $ 102,962 $ 39,149 $ 5,958 $ — $ 148,069 Inter-segment revenue 386 164 24 (574 ) — Segment operating income (loss) 19,209 755 422 (159 ) 20,227 Total assets (at end of period) 309,308 192,729 17,925 52,144 572,106 Capital expenditures 2,266 160 8 10 2,444 Depreciation and amortization 4,454 1,343 335 619 6,751 Three Months Ended June 30, 2015 Revenue from unaffiliated clients $ 118,911 $ 70,589 $ 14,389 $ — $ 203,889 Inter-segment revenue 2,411 652 58 (3,121 ) — Segment operating income (loss) 30,944 14,376 3,452 (879 ) 47,893 Total assets (at end of period) 330,417 229,899 26,048 72,621 658,985 Capital expenditures 4,297 709 45 390 5,441 Depreciation and amortization 4,232 1,649 422 627 6,930 Six Months Ended June 30, 2016 Revenue from unaffiliated clients $ 204,511 $ 83,294 $ 13,911 $ — $ 301,716 Inter-segment revenue 2,293 384 29 (2,706 ) — Segment operating income (loss) 37,429 4,896 909 (67 ) 43,167 Total assets (at end of period) 309,308 192,729 17,925 52,144 572,106 Capital expenditures 4,340 538 16 408 5,302 Depreciation and amortization 8,890 2,768 698 1,242 13,598 Six Months Ended June 30, 2015 Revenue from unaffiliated clients $ 240,670 $ 145,734 $ 31,128 $ — $ 417,532 Inter-segment revenue 5,187 1,369 207 (6,763 ) — Segment operating income (loss) 59,474 24,299 7,318 (481 ) 90,610 Total assets (at end of period) 330,417 229,899 26,048 72,621 658,985 Capital expenditures 8,734 2,512 266 798 12,310 Depreciation and amortization 8,015 3,410 853 1,218 13,496 (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, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	In February 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2015-02 ("Amendments to the Consolidation Analysis") which amends the guidelines for determining whether certain legal entities should be consolidated. This update eliminates the presumption that a general partner should consolidate a limited partnership and modifies the evaluation of whether limited partnerships are variable interest entities or voting interest entities. Overall, the amendments in this Update are an improvement to current GAAP because they simplify the Codification and reduce the number of consolidation models through the elimination of the indefinite deferral of Statement 167 and because they place more emphasis on risk of loss when determining a controlling financial interest. This update is effective for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. We adopted this standard on January 1, 2016. The adoption of this standard had no effect on our current consolidated financial statements or on the entities that we consolidate. In November 2015, the FASB issued ASU 2015-17 ("Balance Sheet Classification of Deferred Taxes") to simplify the presentation of deferred income taxes. The amendments in this update require that deferred tax liabilities and assets be classified as non-current in a classified statement of financial position. This pronouncement is effective for public business entities for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2016, with early adoption permitted. We early adopted this standard for our fiscal year beginning on January 1, 2016 and applied the adoption prospectively. The adoption of this standard had no effect on our current Consolidated Statements of Operations and Consolidated Statement of Cash Flows but had an immaterial effect on our Consolidated Balance Sheet with the reclassification of certain deferred tax balance sheet accounts. The comparative prior period Consolidated Balance Sheet as of December 31, 2015 was not retrospectively adjusted. 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). Since the issuance of ASU 2014-09, the FASB has issued several amendments which clarify certain points in the new Topic 606 - Revenue from Contracts with Customers, including ASU 2016-08 ("Principal versus Agent Considerations - Reporting Revenue Gross versus Net"), ASU 2016-10 ("Identifying Performance Obligations and Licensing"), ASU 2016-11 ("Rescission of SEC Guidance Because of Accounting Standards Updates 2014-09 and 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting"), and ASU 2016-12 ("Narrow-Scope Improvements and Practical Expedients"). We anticipate adopting all of these standards at the same time. We are evaluating the impact that the adoption of these standards will have on our consolidated financial statements. 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 prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. This pronouncement is effective for public business entities for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2016. The adoption of this standard will have no material effect on our current consolidated financial statements. 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 are evaluating the impact that the adoption of this standard will have on our consolidated financial statements. In March 2016, the FASB issued ASU 2016-09 ("Improvements to Employee Share-Based Payment Accounting") which simplifies several aspects of accounting for share-based payment transactions including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The new standard is effective for fiscal years beginning after December 15, 2016 and interim periods within those fiscal years with early adoption permitted. We are evaluating the impact that the adoption of this standard will have on our consolidated financial statements. 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, 2016
Inventory Disclosure [Abstract]
Schedule of Inventory, Current [Table Text Block]	June 30, December 31, Finished goods $ 25,097 $ 25,778 Parts and materials 13,055 12,637 Work in progress 1,666 2,491 Total inventories $ 39,818 $ 40,906

Debt and Capital Lease Obliga23

Debt and Capital Lease Obligations (Tables)	6 Months Ended
	Jun. 30, 2016
Debt and Capital Lease Obligations [Abstract]
Schedule of Long-term Debt Instruments	debt is summarized in the following table (in thousands): June 30, December 31, Senior notes $ 150,000 $ 150,000 Credit facility 60,000 283,000 Other indebtedness 567 2,244 Total debt 210,567 435,244 Less: Short-term debt included in other indebtedness (567 ) (2,244 ) Less: Debt issuance costs (1,763 ) (2,013 ) Long-term debt, net $ 208,237 $ 430,987

Pensions and Other Postretire24

Pensions and Other Postretirement Benefits (Tables)	6 Months Ended
	Jun. 30, 2016
Compensation and Retirement Disclosure [Abstract]
Schedule of Net Benefit Costs	The following table summarizes the components of net periodic pension cost under the Dutch Plan for the three and six months ended June 30, 2016 and 2015 (in thousands): Three Months Ended Six Months Ended June 30, June 30, 2016 2015 2016 2015 Service cost $ 375 $ 440 $ 733 $ 903 Interest cost 342 294 669 603 Expected return on plan assets (287 ) (243 ) (562 ) (499 ) Amortization of transition asset — (22 ) — (44 ) Amortization of prior service cost (19 ) (19 ) (38 ) (38 ) Amortization of actuarial loss 148 184 296 367 Net periodic pension cost $ 559 $ 634 $ 1,098 $ 1,292

Equity (Tables)

Equity (Tables)	6 Months Ended
	Jun. 30, 2016
Equity [Abstract]
Schedule of Stockholders Equity	The following table summarizes our changes in equity for the six months ended June 30, 2016 (in thousands): Shares Outstanding Common Shares Additional Paid-In Capital Retained Earnings Accumulated Treasury Stock Non-Controlling Interest Total Equity December 31, 2015 42,375,905 $ 1,142 $ — $ 219,207 $ (10,538 ) $ (238,875 ) $ 5,365 $ (23,699 ) Stock based-awards 33,892 — 6,488 — — 4,599 — 11,087 Tax detriment of stock-based awards — — (284 ) — — — — (284 ) Repurchase of common shares (10,164 ) — — — — (1,112 ) — (1,112 ) Issuance of common shares 1,696,250 38 197,173 — — — — 197,211 Dividends paid — — — (46,626 ) — — — (46,626 ) Non-controlling interest dividends — — — — — — (211 ) (211 ) Amortization of deferred pension costs, net of tax — — — — 194 — — 194 Interest rate swaps, net of tax — — — — (1,261 ) — — (1,261 ) Net income — — — 31,706 — — (54 ) 31,652 June 30, 2016 44,095,883 $ 1,180 $ 203,377 $ 204,287 $ (11,605 ) $ (235,388 ) $ 5,100 $ 166,951
Schedule of Accumulated Other Comprehensive Income (Loss)	Accumulated other comprehensive income (loss) consisted of the following (in thousands, net of tax): June 30, December 31, Prior service cost $ 632 $ 661 Unrecognized net actuarial loss (9,978 ) (10,201 ) Fair value of derivatives (2,259 ) (998 ) Total accumulated other comprehensive income (loss) $ (11,605 ) $ (10,538 )

Earnings per Share (Tables)

Earnings per Share (Tables)	6 Months Ended
	Jun. 30, 2016
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, 2016 2015 2016 2015 Weighted average basic common shares outstanding 43,297 42,790 42,839 43,063 Effect of dilutive securities: Performance shares 127 104 105 86 Restricted stock 81 65 64 65 Weighted average diluted common and potential common shares outstanding 43,505 42,959 43,008 43,214

Other (Income) Expense, Net (Ta

Other (Income) Expense, Net (Tables)	6 Months Ended
	Jun. 30, 2016
Other Income and Expenses [Abstract]
Foreign Currency Gains Losses By Currency	Foreign exchange (gain) loss, net by currency is summarized in the following table (in thousands): Three Months Ended Six Months Ended June 30, June 30, 2016 2015 2016 2015 Angolan Kwanza $ 43 $ 372 $ 505 $ 508 British Pound 247 (262 ) 475 112 Canadian Dollar (47 ) (51 ) (48 ) 1,223 Euro (40 ) 295 170 (760 ) Nigerian Naira 148 180 158 319 Other currencies, net 82 468 (48 ) 440 Total (gain) loss, net $ 433 $ 1,002 $ 1,212 $ 1,842
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, 2016 2015 2016 2015 Sale of assets $ (122 ) $ (127 ) $ (488 ) $ (262 ) Results of non-consolidated subsidiaries (136 ) (36 ) (324 ) (80 ) Foreign exchange 433 1,002 1,212 1,842 Rents and royalties (98 ) (119 ) (199 ) (255 ) Other, net (124 ) 1,093 (252 ) 890 Total other (income) expense, net $ (47 ) $ 1,813 $ (51 ) $ 2,135

Derivative Instruments (Tables)

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2016
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 (in thousands): Fair Value of Derivatives June 30, 2016 December 31, 2015 Balance Sheet Classification Derivatives designated as hedges: 5 year interest rate swap $ 851 $ 353 Other long-term liabilities 10 year interest rate swap 2,727 1,229 Other long-term liabilities $ 3,578 $ 1,582

Derivative Instruments Derivati

Derivative Instruments Derivative Instruments Gain Loss Table (Tables)	6 Months Ended
	Jun. 30, 2016
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 (in thousands): Three Months Ended Six Months Ended June 30, 2016 June 30, 2015 June 30, 2016 June 30, 2015 Income Statement Classification Derivatives designated as hedges: 5 year interest rate swap $ 81 $ 98 $ 163 $ 195 Increase to interest expense 10 year interest rate swap 130 147 261 293 Increase to interest expense $ 211 $ 245 $ 424 $ 488

Financial Instruments (Tables)

Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements [Table Text Block]	Fair Value Measurement at June 30, 2016 Total Level 1 Level 2 Level 3 Assets: Deferred compensation trust assets (1) $ 23,176 $ — $ 23,176 $ — Liabilities: Deferred compensation plan $ 28,772 $ — $ 28,772 $ — 5 year interest rate swap 851 — 851 — 10 year interest rate swap 2,727 — 2,727 — $ 32,350 $ — $ 32,350 $ — 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 $ — (1) Trust assets consist of the cash surrender value of life insurance policies intended to assist in the funding of the deferred compensation plan and are included in Other assets in the Balance Sheet.

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2016
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Summarized financial information concerning our segments is shown in the following table (in thousands): Reservoir Description Production Enhancement Reservoir Management Corporate & Other 1 Consolidated Three Months Ended June 30, 2016 Revenue from unaffiliated clients $ 102,962 $ 39,149 $ 5,958 $ — $ 148,069 Inter-segment revenue 386 164 24 (574 ) — Segment operating income (loss) 19,209 755 422 (159 ) 20,227 Total assets (at end of period) 309,308 192,729 17,925 52,144 572,106 Capital expenditures 2,266 160 8 10 2,444 Depreciation and amortization 4,454 1,343 335 619 6,751 Three Months Ended June 30, 2015 Revenue from unaffiliated clients $ 118,911 $ 70,589 $ 14,389 $ — $ 203,889 Inter-segment revenue 2,411 652 58 (3,121 ) — Segment operating income (loss) 30,944 14,376 3,452 (879 ) 47,893 Total assets (at end of period) 330,417 229,899 26,048 72,621 658,985 Capital expenditures 4,297 709 45 390 5,441 Depreciation and amortization 4,232 1,649 422 627 6,930 Six Months Ended June 30, 2016 Revenue from unaffiliated clients $ 204,511 $ 83,294 $ 13,911 $ — $ 301,716 Inter-segment revenue 2,293 384 29 (2,706 ) — Segment operating income (loss) 37,429 4,896 909 (67 ) 43,167 Total assets (at end of period) 309,308 192,729 17,925 52,144 572,106 Capital expenditures 4,340 538 16 408 5,302 Depreciation and amortization 8,890 2,768 698 1,242 13,598 Six Months Ended June 30, 2015 Revenue from unaffiliated clients $ 240,670 $ 145,734 $ 31,128 $ — $ 417,532 Inter-segment revenue 5,187 1,369 207 (6,763 ) — Segment operating income (loss) 59,474 24,299 7,318 (481 ) 90,610 Total assets (at end of period) 330,417 229,899 26,048 72,621 658,985 Capital expenditures 8,734 2,512 266 798 12,310 Depreciation and amortization 8,015 3,410 853 1,218 13,496

Basis of Presentation Basis of

Basis of Presentation Basis of Presentation (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Debt issuance costs [Domain]
Debt Instrument [Line Items]
Debt acquisition costs	$ (1,763)	$ (2,013)

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Finished goods	$ 25,097	$ 25,778
Parts and materials	13,055	12,637
Work in progress	1,666	2,491
Total inventories	$ 39,818	$ 40,906

Debt and Capital Lease Obliga34

Debt and Capital Lease Obligations (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
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	25,200
Line of credit facility, remaining borrowing capacity	314,800
Performance bonds	10,000
Long-term Debt, Excluding Current Maturities	208,237	$ 430,987
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	$ 60,000	283,000
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
Short-term Debt [Member]
Debt Instrument [Line Items]
Debt, Current	$ 567	2,244
Total debt [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount	210,567	435,244
Debt issuance costs [Domain]
Debt Instrument [Line Items]
Debt acquisition costs	$ (1,763)	$ (2,013)
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 Postretire35

Pensions and Other Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]
Service cost	$ 375	$ 440	$ 733	$ 903
Interest cost	342	294	669	603
Expected return on plan assets	(287)	(243)	(562)	(499)
Amortization of transition asset	0	22	0	44
Amortization of prior service cost	19	19	38	38
Amortization of actuarial loss	148	184	296	367
Net periodic pension cost	$ 559	$ 634	1,098	$ 1,292
Contributions by employer			$ 1,100

Equity (Narrative) (Details)

Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Equity [Abstract]
Shares scheduled for cancellation	1,250,000
Treasury shares, acquired, tax burden	3,799		10,164
Treasury shares, acquired, value, tax burden	$ 0.4		$ 1.1
Stock Issued During Period, Shares, Treasury Stock Reissued	11,736		33,892
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 ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Stock Issued During Period, Shares, New Issues			1,475,000
Shares Issued During Period, Shares, New Issues, Price per Share			$ 116.67
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			$ (23,699)
Stock based-awards			11,087
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation			(284)
Repurchase of common shares			(1,112)
Stock Issued During Period, Value, New Issues			197,211
Dividends paid			(46,626)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			(211)
Amortization of deferred pension costs, net of tax			194
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	$ (372)	$ 1,347	(1,261)	$ 450
Net income	16,535	$ 34,702	31,652	$ 65,744
Ending balance	$ 166,951		$ 166,951
Stock issued during period, Shares, New Issues, Additional Offering			221,250
Stock Issued During Period, Shares, New Issues, Net Proceeds			$ 197,200
Shares Outstanding [Member]
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures			33,892
Shares, Outstanding	44,095,883		44,095,883		42,375,905
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation			$ 0
Stock Repurchased During Period, Shares			(10,164)
Stock Issued During Period, Shares, New Issues			1,696,250
Dividends paid			$ 0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			0
Amortization of deferred pension costs, net of tax			0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax			0
Net income			0
Common Shares [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			1,142
Stock based-awards			0
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation			0
Repurchase of common shares			0
Stock Issued During Period, Value, New Issues			38
Dividends paid			0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			0
Amortization of deferred pension costs, net of tax			0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax			0
Net income			0
Ending balance	$ 1,180		1,180
Additional Paid-In Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			0
Stock based-awards			6,488
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation			(284)
Repurchase of common shares			0
Stock Issued During Period, Value, New Issues			197,173
Dividends paid			0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			0
Amortization of deferred pension costs, net of tax			0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax			0
Net income			0
Ending balance	203,377		203,377
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			219,207
Stock based-awards			0
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation			0
Repurchase of common shares			0
Stock Issued During Period, Value, New Issues			0
Dividends paid			(46,626)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			0
Amortization of deferred pension costs, net of tax			0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax			0
Net income			31,706
Ending balance	204,287		204,287
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(10,538)
Stock based-awards			0
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation			0
Repurchase of common shares			0
Stock Issued During Period, Value, New Issues			0
Dividends paid			0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			0
Amortization of deferred pension costs, net of tax			194
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax			(1,261)
Net income			0
Ending balance	(11,605)		(11,605)
Treasury Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(238,875)
Stock based-awards			4,599
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation			0
Repurchase of common shares			(1,112)
Stock Issued During Period, Value, New Issues			0
Dividends paid			0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			0
Amortization of deferred pension costs, net of tax			0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax			0
Net income			0
Ending balance	(235,388)		(235,388)
Non-Controlling Interests [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			5,365
Stock based-awards			0
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation			0
Repurchase of common shares			0
Stock Issued During Period, Value, New Issues			0
Dividends paid			0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			(211)
Amortization of deferred pension costs, net of tax			0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax			0
Noncontrolling interest, net income			(54)
Ending balance	$ 5,100		$ 5,100

Equity (Comprehensive Income) (

Equity (Comprehensive Income) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Equity [Abstract]
Prior service cost	$ 632	$ 661
Unrecognized net actuarial loss	(9,978)	(10,201)
Derivative, Fair Value, Net	(2,259)	(998)
Total accumulated other comprehensive income (loss)	$ (11,605)	$ (10,538)

Earnings per Share (Details)

Earnings per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share [Abstract]
Weighted average basic common shares outstanding	43,297	42,790	42,839	43,063
Performance shares (in shares)	127	104	105	86
Restricted stock (in shares)	81	65	64	65
Weighted average diluted common and potential common shares outstanding	43,505	42,959	43,008	43,214

Other (Income) Expense, Net (De

Other (Income) Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Other Income and Expenses [Abstract]
Sale of assets	$ (122)	$ (127)	$ (488)	$ (262)
Results of non-consolidated subsidiaries	(136)	(36)	(324)	(80)
Foreign exchange	433	1,002	1,212	1,842
Rents and royalties	(98)	(119)	(199)	(255)
Other, net	(124)	1,093	(252)	890
Total other (income) expense, net	$ (47)	$ 1,813	$ (51)	$ 2,135

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, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Foreign exchange	$ 433	$ 1,002	$ 1,212	$ 1,842
Angola, Kwanza
Foreign exchange	43	372	505	508
British Pound [Member]
Foreign exchange	247	(262)	475	112
Canadian Dollar [Member]
Foreign exchange	(47)	(51)	(48)	1,223
Euro [Member]
Foreign exchange	(40)	295	170	(760)
Nigeria, Nairas
Foreign exchange	148	180	158	319
Other Currencies Net [Member]
Foreign exchange	$ 82	$ 468	$ (48)	$ 440

Income Tax Expense (Details)

Income Tax Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Tax Contingency [Line Items]
Change in income tax expense - U.S.	$ 68.8
Change in income tax expense	$ (9.4)
Effective income tax rate	3.90%	22.50%	13.80%	22.70%
Release of reserves for uncertain tax positions	$ 0.9

Severance and Other Charges (De

Severance and Other Charges (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Other Income and Expenses [Abstract]
Severance charges			$ (8,800)
Severance and other charges	$ 0	$ 7,090
Accrued severance charges	$ 1,500

Derivative Instruments (Details

Derivative Instruments (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$ 3,578	$ 1,582
Derivative, Notional Amount	50,000
Interest Rate Swap No. 1 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	2,727	1,229
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	$ 851	$ 353
Derivative, Notional Amount	$ 25,000
Derivative, Fixed Interest Rate	1.73%
Derivative, Maturity Date	Aug. 29, 2019
Minimum [Member]
Derivatives, Fair Value [Line Items]
Basis Spread on Variable Rate	1.25%
Maximum [Member]
Derivatives, Fair Value [Line Items]
Basis Spread on Variable Rate	2.00%

Derivative Instruments Long-ter

Derivative Instruments Long-term debt (Details) $ in Millions	Jun. 30, 2016USD ($)
Debt Disclosure in Derivatives Footnote [Abstract]
Long-term Debt, Percentage Bearing Variable Interest, Amount	$ 10
Long-term Debt, Percentage Bearing Fixed Interest, Amount	$ 200

Derivative Instruments Deriva46

Derivative Instruments Derivative gain loss table (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	$ 211	$ 245	$ 424	$ 488
Interest Rate Swap No. 1 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	130	147	261	293
Interest Rate Swap No. 2 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	$ 81	$ 98	$ 163	$ 195

Financial Instruments FInancial

Financial Instruments FInancial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 23,176	$ 23,737
Deferred Compensation Liability, Current and Noncurrent	28,772	29,155
Financial and Nonfinancial Liabilities, Fair Value Disclosure	32,350	30,737
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	23,176	23,737
Deferred Compensation Liability, Current and Noncurrent	28,772	29,155
Financial and Nonfinancial Liabilities, Fair Value Disclosure	32,350	30,737
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	851	353
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	851	353
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	2,727	1,229
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	2,727	1,229
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, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenue from unaffiliated clients	$ 148,069	$ 203,889	$ 301,716	$ 417,532
Inter-segment revenue	0	0	0	0
Segment operating income (loss)	20,227	47,893	43,167	90,610
Total assets (at end of period)	572,106	658,985	572,106	658,985	$ 625,258
Capital expenditures	2,444	5,441	5,302	12,310
Depreciation and amortization	6,751	6,930	13,598	13,496
Operating Segments [Member] | Reservoir Description [Member]
Segment Reporting Information [Line Items]
Revenue from unaffiliated clients	102,962	118,911	204,511	240,670
Inter-segment revenue	386	2,411	2,293	5,187
Segment operating income (loss)	19,209	30,944	37,429	59,474
Total assets (at end of period)	309,308	330,417	309,308	330,417
Capital expenditures	2,266	4,297	4,340	8,734
Depreciation and amortization	4,454	4,232	8,890	8,015
Operating Segments [Member] | Production Enhancement [Member]
Segment Reporting Information [Line Items]
Revenue from unaffiliated clients	39,149	70,589	83,294	145,734
Inter-segment revenue	164	652	384	1,369
Segment operating income (loss)	755	14,376	4,896	24,299
Total assets (at end of period)	192,729	229,899	192,729	229,899
Capital expenditures	160	709	538	2,512
Depreciation and amortization	1,343	1,649	2,768	3,410
Operating Segments [Member] | Reservoir Management [Member]
Segment Reporting Information [Line Items]
Revenue from unaffiliated clients	5,958	14,389	13,911	31,128
Inter-segment revenue	24	58	29	207
Segment operating income (loss)	422	3,452	909	7,318
Total assets (at end of period)	17,925	26,048	17,925	26,048
Capital expenditures	8	45	16	266
Depreciation and amortization	335	422	698	853
Corporate & Other [Member]
Segment Reporting Information [Line Items]
Revenue from unaffiliated clients	0	0	0	0
Inter-segment revenue	(574)	(3,121)	(2,706)	(6,763)
Segment operating income (loss)	(159)	(879)	(67)	(481)
Total assets (at end of period)	52,144	72,621	52,144	72,621
Capital expenditures	10	390	408	798
Depreciation and amortization	$ 619	$ 627	$ 1,242	$ 1,218