Core Laboratories (CLB) 10-Q 25 Oct 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Oct. 23, 2019
Cover [Abstract]
Entity Registrant Name	CORE LABORATORIES N.V.
Entity Central Index Key	0001000229
Trading Symbol	CLB
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		44,374,852
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity File Number	001-14273
Entity Incorporation, State or Country Code	P7
Entity Address, Address Line One	Strawinskylaan 913
Entity Address, Address Line Two	Tower A, Level 9
Entity Address, City or Town	Amsterdam
Entity Address, Country	NL
Entity Address, Postal Zip Code	1077 XX
City Area Code	31-20
Local Phone Number	420-3191
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock (par value EUR 0.02)
Security Exchange Name	NYSE

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 13,128	$ 13,116
Accounts receivable, net of allowance for doubtful accounts of $2,858 and $2,650 at 2019 and 2018, respectively	137,355	129,157
Inventories	53,528	45,664
Prepaid expenses	12,508	15,351
Income taxes receivable	7,853	13,993
Other current assets	6,314	13,696
TOTAL CURRENT ASSETS	230,686	230,977
PROPERTY, PLANT AND EQUIPMENT, net	125,078	122,917
RIGHT OF USE ASSETS	76,238
INTANGIBLES, net	17,763	13,054
GOODWILL	213,425	219,412
DEFERRED TAX ASSETS, net	71,296	11,252
OTHER ASSETS	53,210	51,215
TOTAL ASSETS	787,696	648,827
CURRENT LIABILITIES:
Accounts payable	42,191	41,155
Accrued payroll and related costs	27,866	22,549
Taxes other than payroll and income	7,961	7,488
Unearned revenues	12,348	17,325
Operating lease liabilities	11,869
Income taxes payable	4,996	2,917
Other current liabilities	12,766	11,113
TOTAL CURRENT LIABILITIES	119,997	102,547
LONG-TERM DEBT, net	297,148	289,770
LONG-TERM OPERATING LEASE LIABILITIES	63,754
DEFERRED COMPENSATION	49,072	49,359
DEFERRED TAX LIABILITIES, net	29,196	7,634
OTHER LONG-TERM LIABILITIES	33,968	38,617
COMMITMENTS AND CONTINGENCIES
EQUITY:
Preference shares, EUR 0.02 par value; 6,000,000 shares authorized, none issued or outstanding	0	0
Common shares, EUR 0.02 par value; 200,000,000 shares authorized, 44,796,252 issued and 44,374,852 outstanding at 2019 and 44,796,252 issued and 44,316,845 outstanding at 2018	1,148	1,148
Additional paid-in capital	64,498	57,438
Retained earnings	174,615	156,130
Accumulated other comprehensive income (loss)	(6,604)	(5,456)
Treasury shares (at cost), 421,400 at 2019 and 479,407 at 2018	(43,411)	(52,501)
Total Core Laboratories N.V. shareholders' equity	190,246	156,759
Non-controlling interest	4,315	4,141
TOTAL EQUITY	194,561	160,900
TOTAL LIABILITIES AND EQUITY	$ 787,696	$ 648,827

Consolidated Balance Sheets Par

Consolidated Balance Sheets Parenthetical $ in Thousands	Sep. 30, 2019USD ($)shares	Sep. 30, 2019€ / shares	Dec. 31, 2018USD ($)shares	Dec. 31, 2018€ / shares
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts | $	$ 2,858		$ 2,650
Preferred stock, par 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
Common stock, par 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 shares, outstanding	44,374,852		44,316,845
Treasury stock, shares	421,400		479,407

Consolidated Statement of Incom

Consolidated Statement of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
REVENUES:
Revenue	$ 173,200	$ 182,146	$ 511,432	$ 527,639
OPERATING EXPENSES:
General and administrative expense, exclusive of depreciation expense shown below	11,012	13,278	38,250	38,189
Depreciation	5,199	5,436	15,631	16,646
Amortization	498	244	1,439	720
Other (income) expense, net	(712)	130	2,653	170
OPERATING INCOME	31,207	34,879	75,629	100,644
Interest expense	3,662	3,278	11,102	9,694
Income from continuing operations before income tax expense	27,545	31,601	64,527	90,950
Income tax expense (benefit)	3,335	9,404	(19,467)	19,697
Income from continuing operations	24,210	22,197	83,994	71,253
Income (loss) from discontinued operations, net of income taxes	(397)	208	7,833	(466)
Net income	23,813	22,405	91,827	70,787
Net income (loss) attributable to non-controlling interest	84	(7)	174	96
Net income attributable to Core Laboratories N.V.	$ 23,729	$ 22,412	$ 91,653	$ 70,691
EARNINGS (LOSS) PER SHARE INFORMATION:
Basic earnings per share from continuing operations (in dollar per share)	$ 0.55	$ 0.50	$ 1.89	$ 1.61
Basic earnings (loss) per share from discontinued operations	(0.01)	0.01	0.18	(0.01)
Basic earnings per share attributable to Core Laboratories N.V. (in dollar per share)	0.54	0.51	2.07	1.60
Diluted earnings per share from continuing operations (in dollar per share)	0.54	0.50	1.87	1.60
Diluted earnings (loss) per share from discontinued operations	(0.01)		0.17	(0.01)
Diluted earnings per share attributable to Core Laboratories N.V. (in dollar per share)	$ 0.53	$ 0.50	$ 2.04	$ 1.59
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	44,371	44,216	44,349	44,199
Diluted (in shares)	44,716	44,591	44,854	44,613
Service [Member]
REVENUES:
Revenue	$ 120,817	$ 124,145	$ 359,029	$ 366,025
OPERATING EXPENSES:
Cost of services and product sales exclusive of depreciation expense shown below	86,243	88,435	262,616	258,482
Product [Member]
REVENUES:
Revenue	52,383	58,001	152,403	161,614
OPERATING EXPENSES:
Cost of services and product sales exclusive of depreciation expense shown below	$ 39,753	$ 39,744	$ 115,214	$ 112,788

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 23,813	$ 22,405	$ 91,827	$ 70,787
Changes in fair value of interest rate swaps	(293)	205	(1,322)	1,086
Interest rate swap amounts reclassified to interest expense	(8)	4	(102)	93
Income taxes on derivatives	63	(44)	299	(248)
Total derivatives	(238)	165	(1,125)	931
Prior service cost	(25)	(19)	(75)	(58)
Unrecognized net actuarial loss	15	84	44	252
Income taxes on pension and other postretirement benefit plans	3	(17)	8	(49)
Total pension and other postretirement benefit plans	(7)	48	(23)	145
Total other comprehensive income (loss)	(245)	213	(1,148)	1,076
Comprehensive income	23,568	22,618	90,679	71,863
Net income (loss) attributable to non-controlling interest	84	(7)	174	96
Comprehensive income attributable to Core Laboratories N.V.	$ 23,484	$ 22,625	$ 90,505	$ 71,767

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	AOCI Attributable to Parent	Treasury Stock	Noncontrolling Interest
Balance at Beginning of Period at Dec. 31, 2017	$ 148,732	$ 1,148	$ 54,463	$ 173,855	$ (8,353)	$ (76,269)	$ 3,888
Stock based-awards	18,533		7,186			11,347
Repurchase of common shares	(4,777)					(4,777)
Dividends paid	(72,929)			(72,929)
Non-controlling interest additions	(10)						(10)
Amortization of deferred pension costs, net of tax	145				145
Interest rate swaps, net of tax	931				931
Net income	70,787			70,691			96
Balance at End of Period at Sep. 30, 2018	$ 161,412	1,148	61,649	171,617	(7,277)	(69,699)	3,974
Cash Dividends per Share	$ 1.65
Balance at Beginning of Period at Jun. 30, 2018	$ 157,774	1,148	58,927	173,499	(7,490)	(72,301)	3,991
Stock based-awards	6,141		2,722			3,419
Repurchase of common shares	(817)					(817)
Dividends paid	(24,294)			(24,294)
Non-controlling interest additions	(10)						(10)
Amortization of deferred pension costs, net of tax	48				48
Interest rate swaps, net of tax	165				165
Net income	22,405			22,412			(7)
Balance at End of Period at Sep. 30, 2018	$ 161,412	1,148	61,649	171,617	(7,277)	(69,699)	3,974
Cash Dividends per Share	$ 0.55
Balance at Beginning of Period at Dec. 31, 2018	$ 160,900	1,148	57,438	156,130	(5,456)	(52,501)	4,141
Stock based-awards	17,652		7,060			10,592
Repurchase of common shares	(1,502)					(1,502)
Dividends paid	(73,168)			(73,168)
Amortization of deferred pension costs, net of tax	(23)				(23)
Interest rate swaps, net of tax	(1,125)				(1,125)
Net income	91,827			91,653			174
Balance at End of Period at Sep. 30, 2019	$ 194,561	1,148	64,498	174,615	(6,604)	(43,411)	4,315
Cash Dividends per Share	$ 1.65
Balance at Beginning of Period at Jun. 30, 2019	$ 192,492	1,148	64,064	175,285	(6,359)	(45,877)	4,231
Stock based-awards	3,311		434			2,877
Repurchase of common shares	(411)					(411)
Dividends paid	(24,399)			(24,399)
Amortization of deferred pension costs, net of tax	(7)				(7)
Interest rate swaps, net of tax	(238)				(238)
Net income	23,813			23,729			84
Balance at End of Period at Sep. 30, 2019	$ 194,561	$ 1,148	$ 64,498	$ 174,615	$ (6,604)	$ (43,411)	$ 4,315
Cash Dividends per Share	$ 0.55

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Income from continuing operations	$ 83,994	$ 71,253
Income (loss) from discontinued operations, net of tax	7,833	(466)
Net income	91,827	70,787
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	17,652	18,533
Depreciation and amortization	17,070	17,366
Changes to value of life insurance policies	(2,110)	(3,459)
Deferred income taxes	(38,469)	(311)
Gain on sale of business	(1,154)
Gain on sale of discontinued operations	(8,411)
Other non-cash items	309	1,114
Changes in assets and liabilities, net of effect of acquisitions:
Accounts receivable	(8,924)	(11,972)
Inventories	(7,202)	(12,121)
Prepaid expenses and other current assets	5,285	(935)
Other assets	1,486	(451)
Accounts payable	1,762	(2,571)
Accrued expenses	10,900	(1,452)
Unearned revenues	(6,545)	742
Other long-term liabilities	(5,251)	(1,344)
Net cash provided by operating activities	68,225	73,926
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(17,537)	(16,063)
Patents and other intangibles	(90)	(970)
Business acquisitions, net of cash acquired		(47,314)
Proceeds from sale of assets	700	270
Proceeds from sale of business	2,980
Proceeds from sale of discontinued operations	14,789
Premiums on life insurance	(1,385)	(788)
Net cash used in investing activities	(543)	(64,865)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of debt borrowings	(96,000)	(80,000)
Proceeds from debt borrowings	103,000	150,000
Debt financing costs		(1,645)
Non-controlling interest-dividends		(10)
Dividends paid	(73,168)	(72,929)
Repurchase of common shares	(1,502)	(4,777)
Net cash used in financing activities	(67,670)	(9,361)
NET CHANGE IN CASH AND CASH EQUIVALENTS	12	(300)
CASH AND CASH EQUIVALENTS, beginning of period	13,116	14,400
CASH AND CASH EQUIVALENTS, end of period	13,128	14,100
Supplemental disclosures of cash flow information:
Cash payments for interest	11,832	9,768
Cash payments for income taxes	$ 11,081	$ 21,821

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	1. 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, 2018 (the "2018 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 nine months ended September 30, 2019 may not necessarily be indicative of the results that may be expected for the year ending December 31, 2019. Core Laboratories N.V.'s balance sheet information for the year ended December 31, 2018 was derived from the 2018 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. We operate our business in two 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: • Production Enhancement: 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 and nine months ended September 30, 2018.

Inventories

Inventories	9 Months Ended
	Sep. 30, 2019
Inventory Disclosure [Abstract]
Inventories	2. INVENTORIES Inventories consisted of the following (in thousands): September 30, 2019 December 31, 2018 Finished goods $ 28,915 $ 26,636 Parts and materials 22,385 13,704 Work in progress 2,228 5,324 Total inventories $ 53,528 $ 45,664 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.

Significant Accounting Policies

Significant Accounting Policies Update	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Significant Accounting Policies Update	3. SIGNIFICANT ACCOUNTING POLICIES UPDATE Our significant accounting policies are detailed in "Note 2: Summary of Significant Accounting Policies" of our Annual Report on Form 10-K for the year ended December 31, 2018. Significant changes to our accounting policies as a result of adopting Topic 842 - Leases Leases We have operating leases primarily consisting of offices and lab space, machinery and equipment and vehicles. We determine if an arrangement is a lease at inception. Operating leases are included in right of use (“ROU”) assets, current operating lease liabilities and long-term operating lease liabilities in our Consolidated Balance Sheet. Finance leases, if any, are included in property and equipment, other current liabilities and other long term liabilities in our Consolidated Balance Sheet. Lease assets and lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. Where our lease does not provide an implicit rate, we estimate the discount rate used to discount the future minimum lease payments using our incremental borrowing rate and other information available at the commencement date. The ROU assets also include all initial direct costs incurred. Our lease term may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option.

Contract Assets and Liabilities

Contract Assets and Liabilities	9 Months Ended
	Sep. 30, 2019
Revenue From Contract With Customer [Abstract]
Contract Assets and Liabilities	4. CONTRACT ASSETS AND CONTRACT LIABILITIES Contract assets and liabilities result due to the timing of revenue recognition, billings and cash collections. Contract assets include our right to payment for goods and services already transferred to a customer when the right to payment is conditional on something other than the passage of time, for example contracts where we recognize revenue over time but do not have a contractual right to payment until we complete the performance obligations. Contract assets are included in accounts receivable in our Consolidated Balance Sheet. Contract liabilities consist of advance payments received and billings in excess of revenue recognized. We generally receive up-front payments relating to our consortia studies; we recognize revenue over the life of the study as the testing and analysis results are made available to our consortia members. We record billings in excess of revenue recognized for contracts with a duration less than twelve months as unearned revenue. We classify contract liabilities for contracts with a duration greater than twelve months as current or non-current based on the timing of when we expect to recognize revenue. The current portion of contract liabilities is included in unearned revenue and the non-current portion of contract liabilities is included in other long-term liabilities in our Consolidated Balance Sheet. The balance of contract assets and contract liabilities consisted of the following (in thousands): September 30, 2019 December 31, 2018 Contract assets Current $ 1,339 $ 1,145 Non-Current 397 188 $ 1,736 $ 1,333 Contract Liabilities Current $ 3,929 $ 5,963 Non-current 434 1,401 $ 4,363 $ 7,364 September 30, 2019 Estimate of when contract liabilities will be recognized as revenue within 12 months $ 3,929 within 12 to 24 months 434 greater than 24 months — We did not recognize any impairment losses on our receivables and contract assets for the three and nine months ended September 30, 2019.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Acquisitions	5. ACQUISITIONS In 2018, we acquired a business providing downhole technologies associated with perforating systems for $48.9 million in cash. These downhole technologies will significantly enhance Core Lab's Production Enhancement operations and its ability to bring new and innovative product offerings to our clients. During the three months ended September 30, 2019, we finalized the fair value assessment of the assets acquired. We have determined the fair value of tangible assets acquired to be $4.1 million, and intangible assets, including patents, customer-relationship benefits, non-compete agreements and trade secrets to be $9.4 million. We have accounted for this acquisition by allocating the purchase price to the net assets acquired based on their fair values at the date of acquisition which resulted in an increase to goodwill of $35.4 million. During the three months ended September 30, 2019, we increased the fair value of intangible assets by $0.9 million. The acquisition is included in the Production Enhancement business segment. The acquisition of this business did not have a material impact on our Consolidated Balance Sheet or Consolidated Statements of Operations.

Discontinued Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 2019
Discontinued Operations And Disposal Groups [Abstract]
Discontinued Operations	6. DISCONTINUED OPERATIONS In 2018, in a continuing effort to streamline our business and align our business strategy for further integration of services and products, the Company committed to divest the business of our full range of permanent downhole monitoring systems and related services, which had been part of our Production Enhancement segment. On June 7, 2019, we entered into a definitive purchase agreement for the divestiture of our full range of permanent downhole monitoring systems and related services, which was previously part of our Production Enhancement segment for approximately $16.6 million in cash. The purchase agreement also provides for additional proceeds of up to $2.5 million based on the results of operations of the sold business in 2019 and 2020, none of which has been recognized. A pre-tax gain of $8.3 million was recognized in connection with this transaction, subject to adjustments for working capital purposes and is classified in Income from discontinued operations in the Consolidated Statements of Operations. The associated results of operations are separately reported as Discontinued Operations for all periods presented on the Consolidated Statements of Operations. Balance sheet items for this discontinued business, including an allocation of goodwill from the Production Enhancement segment, have been reclassified to Other current assets and Other current liabilities in the Consolidated Balance Sheet as of December 31, 2018. Cash flows from this discontinued business are shown below. As such, the results from continuing operations for the Company and segment highlights for Production Enhancement, exclude these discontinued operations. Selected data for this discontinued business consisted of the following (in thousands): Three Months Ended September 30, 2019 September 30, 2018 Service revenue $ — $ 167 Product sales — 2,058 Total revenue — 2,225 Cost of services, exclusive of depreciation expense shown below — 87 Cost of product sales, exclusive of depreciation expense shown below — 1,944 Depreciation and amortization — 14 Other expense — (1 ) Operating income (loss) — 181 Adjustment to gain on sale (485 ) — Income (loss) from discontinued operations before income tax expense (485 ) 181 Income tax expense (benefit) (88 ) (27 ) Income (loss) from discontinued operations, net of income taxes $ (397 ) $ 208 Nine Months Ended September 30, 2019 September 30, 2018 Service revenue $ 1,165 $ 1,069 Product sales 4,233 3,768 Total revenue 5,398 4,837 Cost of services, exclusive of depreciation expense shown below 690 961 Cost of product sales, exclusive of depreciation expense shown below 3,196 4,124 Depreciation and amortization — 115 Other expense 91 22 Operating income (loss) 1,421 (385 ) Gain on sale 8,319 — Income (loss) from discontinued operations before income tax expense 9,740 (385 ) Income tax expense 1,907 81 Income (loss) from discontinued operations, net of income taxes $ 7,833 $ (466 ) September 30, 2019 December 31, 2018 Current assets $ — $ 3,712 Non-current assets — 1,848 Total assets $ — $ 5,560 Current liabilities $ — $ 1,633 Non-current liabilities — 82 Total liabilities $ — $ 1,715 Net cash provided by (used in) operating activities of discontinued operations for the nine months ended September 30, 2019 and 2018 was $0.1 million and $(0.5) million, respectively. Net cash provided by investing activities of discontinued operations for the nine months ended September 30, 2019 and 2018 was $14.8 million and $0.0 million, respectively.

Long-Term Debt, Net

Long-Term Debt, Net	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Long-Term Debt, Net	7. LONG-TERM DEBT, NET We have no financing lease obligations. Long-term debt is as follows (in thousands): September 30, 2019 December 31, 2018 Senior Notes $ 150,000 $ 150,000 Credit Facility 149,000 142,000 Total long-term debt 299,000 292,000 Less: Debt issuance costs (1,852 ) (2,230 ) Long-term debt, net $ 297,148 $ 289,770 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. The aggregate borrowing commitment under our revolving credit facility (the “Credit Facility”) is $300 million. The Credit Facility provides an option to increase the commitment under the Credit Facility by an additional $100 million to bring the total borrowings available to $400 million if certain prescribed conditions are met by the Company. The Credit Facility bears interest at variable rates from LIBOR plus 1.375% to a maximum of LIBOR plus 2.00%. Any outstanding balance under the Credit Facility is due June 19, 2023, 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 $19.1 million at September 30, 2019, resulting in an available borrowing capacity under the Credit Facility of $131.9 million. In addition to those items under the Credit Facility, we had $12.0 million of outstanding letters of credit and performance guarantees and bonds from other sources as of September 30, 2019. 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. The terms of our Credit Facility allow us to negotiate in good faith to amend any ratio or requirement to preserve the original intent of the agreement if any change in accounting principle would affect the computation of any financial ratio or requirement of the Credit Facility. The adoption on January 1, 2019 of ASU 2016-02 does not affect the calculation of consolidated EBITDA under the agreement. 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, one of which expired during the three months ended September 30, 2019. See Note 15 - Derivative Instruments and Hedging Activities The estimated fair value of total debt at September 30, 2019 and December 31, 2018 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.

Pension

Pension	9 Months Ended
	Sep. 30, 2019
Compensation And Retirement Disclosure [Abstract]
Pension	8. PENSION 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 2000. 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 Nine Months Ended September 30, September 30, 2019 2018 2019 2018 Service cost $ 191 $ 359 $ 572 $ 1,100 Interest cost 259 308 778 944 Expected return on plan assets (231 ) (266 ) (692 ) (815 ) Amortization of prior service cost (25 ) (19 ) (75 ) (58 ) Amortization of actuarial loss 15 84 44 252 Net periodic pension cost $ 209 $ 466 $ 627 $ 1,423 During the nine months ended September 30, 2019, we contributed $1.5 million to fund the estimated 2019 premiums on investment contracts held by the Dutch Plan.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	9. 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. A liability is accrued when a loss is both probable and can be reasonably estimated.

Equity

Equity	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Equity	10. EQUITY During the three and nine months ended September 30, 2019, we repurchased 8,397 and 24,453 of our common shares for $0.4 million and $1.5 million, respectively, which 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 28,452 and 82,460 treasury shares upon vesting of stock-based awards during the three and nine months ended September 30, 2019. In February, May and August 2019, we paid a quarterly dividend of $0.55 per share of common stock. In addition, on October 8, 2019, we declared a quarterly dividend of $0.55 per share of common stock for shareholders of record on October 18, 2019 and payable on November 19, 2019. Accumulated other comprehensive loss consisted of the following (in thousands): September 30, 2019 December 31, 2018 Prior service cost $ 537 $ 593 Unrecognized net actuarial loss (6,210 ) (6,243 ) Fair value of derivatives, net of tax (931 ) 194 Total accumulated other comprehensive loss $ (6,604 ) $ (5,456 )

Earnings per Share

Earnings per Share	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Earnings per Share	11. 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 Nine Months Ended September 30, September 30, 2019 2018 2019 2018 Weighted average basic common shares outstanding 44,371 44,216 44,349 44,199 Effect of dilutive securities: Performance shares 4 221 111 269 Restricted stock 341 154 394 145 Weighted average diluted common and potential common shares outstanding 44,716 44,591 44,854 44,613

Other (Income) Expense, Net

Other (Income) Expense, Net	9 Months Ended
	Sep. 30, 2019
Other Income And Expenses [Abstract]
Other (Income) Expense, Net	12. OTHER (INCOME) EXPENSE, NET The components of other (income) expense, net, were as follows (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2019 2018 2019 2018 Gain on sale of assets $ (151 ) $ (136 ) $ (458 ) $ (643 ) Results of non-consolidated subsidiaries (96 ) (57 ) (193 ) (126 ) Foreign exchange 570 1,135 389 2,221 Rents and royalties (134 ) (264 ) (727 ) (500 ) Employment related charges — — 2,866 — Return on pension assets and other pension costs (232 ) (201 ) (714 ) (621 ) Acquisition-related costs — 623 — 623 Gain on sale of business — — (1,154 ) — Cost reduction and other charges — — 2,977 — Other, net (669 ) (970 ) (333 ) (784 ) Total other (income) expense, net $ (712 ) $ 130 $ 2,653 $ 170 Foreign exchange gains and losses are summarized in the following table (in thousands): Three Months Ended Nine Months Ended September 30, September 30, (Gains) losses by currency 2019 2018 2019 2018 British Pound $ 163 $ 89 $ 341 $ 65 Canadian Dollar 197 (113 ) 285 244 Euro 18 108 20 92 Other currencies, net 192 1,051 (257 ) 1,820 Total loss, net $ 570 $ 1,135 $ 389 $ 2,221 During the nine months ended September 30, 2019, we sold a business for a cash payment of $3.0 million. As this represented a single location within our business units, the sale did not constitute a discontinued operation and, accordingly, the effects of this transaction are included in continuing operations.

Income Tax Expense

Income Tax Expense	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Tax Expense	13. INCOME TAX EXPENSE The effective tax rates for the three months ended September 30, 2019 and 2018 were 12.1% and 29.8%, respectively. The income tax expense of $3.3 million for the three months ended September 30, 2019 decreased by $6.1 million compared to $9.4 million in the same period in 2018, due to the result of several items discrete to each quarter, along with changes in activity levels in jurisdictions with differing tax rates. The effective tax rates for the nine months ended September 30, 2019 and 2018 were (30.2)% and 21.7%, respectively. Tax expense for the nine months ended September 30, 2019 includes a net tax benefit of $58.5 million which resulted from a corporate restructuring in the first quarter and tax expense of $26.7 million related to unremitted earnings of foreign subsidiaries that we no longer consider to be indefinitely reinvested, each of which was a discrete item in the first quarter of 2019.

Leases

Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	14. LEASES We have operating leases primarily consisting of offices and lab space, machinery and equipment and vehicles. The components of lease expense are as follows (in thousands): Three months ended Nine months ended September 30, 2019 September 30, 2019 Lease Cost Operating lease cost $ 4,724 $ 14,027 Short-term lease cost 402 1,024 Variable lease cost 162 521 Total lease cost $ 5,288 $ 15,572 Other Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 4,306 $ 13,729 Right-of-use assets obtained in exchange for new lease obligations: Operating leases $ 3,837 $ 11,066 Weighted-average remaining lease term- operating leases 9.18 years 9.18 years Weighted-average discount rate - operating leases 4.95 % 4.95 % Scheduled undiscounted cash flows for non-cancellable leases at September 30, 2019 consist of the following (in thousands): Operating Leases Remainder of 2019 $ 4,132 2020 14,566 2021 12,130 2022 10,754 2023 9,193 Thereafter 43,842 Total undiscounted lease payments $ 94,617 Less: Imputed Interest (18,994 ) Total lease liabilities $ 75,623 We adopted ASU 2017-06 using the cumulative effect transition method on January 1, 2019. As required, the following disclosure is provided for periods prior to adoption. Scheduled minimum rental commitments under non-cancellable operating leases at December 31, 2018, consist of the following (in thousands): Operating Leases 2019 $ 16,267 2020 12,572 2021 9,774 2022 7,955 2023 4,938 Thereafter 14,815 Total commitments $ 66,321 The Company has elected to apply the short-term lease exemption to all of its classes of underlying assets. Accordingly, no ROU asset or lease liability is recognized for leases with a term of twelve months or less. The Company has elected to apply the practical expedient for combining lease and non-lease components for vehicle leases and elected not to apply the practical expedient for combining lease and non-lease components to all other classes of underlying assets.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	9 Months Ended
	Sep. 30, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	15. 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 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. The first swap agreement of $25 million expired on August 29, 2019, and under the second swap agreement, we have fixed the LIBOR portion of the interest rate at 2.5% through August 29, 2024. This swap is measured at fair value and recorded in our Consolidated Balance Sheet as an asset or liability. It is designated and qualifies as a cash flow hedging instrument and is highly effective. Unrealized losses are deferred to shareholders' equity as a component of accumulated other comprehensive gain (loss) and are recognized in income as an increase or decrease to interest expense in the period in which the related cash flows being hedged are recognized in expense. Our Credit Facility bears interest at variable rates from LIBOR plus 1.375% to a maximum of LIBOR plus 2.00%. As a result of the interest rate swap agreement, we are subject to interest rate risk on debt in excess of $25 million drawn on our Credit Facility. At September 30, 2019, we had fixed rate long-term debt aggregating $175 million and variable rate long-term debt aggregating $124 million, after taking into account the effect of the swap. The fair values of outstanding derivative instruments are as follows (in thousands): Fair Value of Derivatives September 30, 2019 December 31, 2018 Balance Sheet Classification Derivatives designated as hedges: 5 year interest rate swap $ — $ 135 Other current assets 10 year interest rate swap (1,359 ) (70 ) Other long-term (liabilities) $ (1,359 ) $ 65 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 Nine Months Ended September 30, September 30, 2019 2018 2019 2018 Income Statement Classification Derivatives designated as hedges: 5 year interest rate swap $ (24 ) $ (23 ) $ (120 ) $ (27 ) (Decrease) to interest expense 10 year interest rate swap 16 27 18 120 Increase to interest expense $ (8 ) $ 4 $ (102 ) $ 93

Financial Instruments

Financial Instruments	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Financial Instruments	16. 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 September 30, 2019 Total Level 1 Level 2 Level 3 Assets: Deferred compensation assets (1) $ 44,630 $ — $ 44,630 $ — $ 44,630 $ — $ 44,630 $ — Liabilities: Deferred compensation plan $ 33,714 $ — $ 33,714 $ — 10 year 1,359 — 1,359 — $ 35,073 $ — $ 35,073 $ — Fair Value Measurement at December 31, 2018 Total Level 1 Level 2 Level 3 Assets: Deferred compensation assets (1) $ 42,161 $ — $ 42,161 $ — 5 year 135 — 135 — $ 42,296 $ — $ 42,296 $ — Liabilities: Deferred compensation plan $ 33,287 $ — $ 33,287 $ — 10 year 70 — 70 — $ 33,357 $ — $ 33,357 $ — (1) Deferred compensation 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	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Segment Reporting	17. SEGMENT REPORTING We operate our business in two 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 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: 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 September 30, 2019 Revenue from unaffiliated clients $ 109,339 $ 63,861 $ — $ 173,200 Inter-segment revenue 99 199 (298 ) — Segment operating income 18,835 11,456 916 31,207 Total assets (at end of period) 347,475 287,431 152,790 787,696 Capital expenditures 3,260 1,982 65 5,307 Depreciation and amortization 3,684 1,650 363 5,697 Three months ended September 30, 2018 Revenue from unaffiliated clients $ 103,609 $ 78,537 $ — $ 182,146 Inter-segment revenue 58 141 (199 ) — Segment operating income 14,956 19,243 680 34,879 Total assets (at end of period) 321,025 276,345 69,227 666,597 Capital expenditures 2,437 1,680 31 4,148 Depreciation and amortization 4,138 1,037 505 5,680 Nine months ended September 30, 2019 Revenue from unaffiliated clients $ 318,280 $ 193,152 $ — $ 511,432 Inter-segment revenue 346 419 (765 ) — Segment operating income 40,892 31,792 2,945 75,629 Total assets 347,475 287,431 152,790 787,696 Capital expenditures 7,906 9,114 517 17,537 Depreciation and amortization 11,505 4,377 1,188 17,070 Nine months ended September 30, 2018 Revenue from unaffiliated clients $ 306,525 $ 221,114 $ — $ 527,639 Inter-segment revenue 178 293 (471 ) — Segment operating income 44,473 55,357 814 100,644 Total assets 321,025 276,345 69,227 666,597 Capital expenditures 10,002 5,465 596 16,063 Depreciation and amortization 12,675 3,045 1,646 17,366 (1) "Corporate & Other" represents those items that are not directly related to a particular segment, eliminations and the assets and liabilities of discontinued operations.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2019
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Recent Accounting Pronouncements	18. RECENT ACCOUNTING PRONOUNCEMENTS Pronouncements Adopted in 2019 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. In July 2018, the FASB issued ASU 2018-11 ("Targeted Improvements to Leases"), which provides companies with an additional transition method that allows the effects of the adoption of the new standard to be recognized as a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. We elected this optional transition method for adoption. The adoption of this standard on January 1, 2019 had a material impact to our Consolidated Balance Sheet ; but not to our Consolidated Statement of Operations or Cash Flows. The most significant impact was the recognition of $ 77.5 million of ROU assets and liabilities for operating leases, while our accounting for finance leases remained substantially unchanged. Pronouncements Not Yet Effective 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. The adoption of this standard will not have a significant impact on our consolidated financial statements or on our accounting policies and processes.

Significant Accounting Polici_2

Significant Accounting Policies Update (Policies)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Leases	Leases We have operating leases primarily consisting of offices and lab space, machinery and equipment and vehicles. We determine if an arrangement is a lease at inception. Operating leases are included in right of use (“ROU”) assets, current operating lease liabilities and long-term operating lease liabilities in our Consolidated Balance Sheet. Finance leases, if any, are included in property and equipment, other current liabilities and other long term liabilities in our Consolidated Balance Sheet. Lease assets and lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. Where our lease does not provide an implicit rate, we estimate the discount rate used to discount the future minimum lease payments using our incremental borrowing rate and other information available at the commencement date. The ROU assets also include all initial direct costs incurred. Our lease term may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option.

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2019
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories consisted of the following (in thousands): September 30, 2019 December 31, 2018 Finished goods $ 28,915 $ 26,636 Parts and materials 22,385 13,704 Work in progress 2,228 5,324 Total inventories $ 53,528 $ 45,664

Contract Assets and Liabiliti_2

Contract Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2019
Revenue From Contract With Customer [Abstract]
Schedule of Contract Assets and Liabilities	The balance of contract assets and contract liabilities consisted of the following (in thousands): September 30, 2019 December 31, 2018 Contract assets Current $ 1,339 $ 1,145 Non-Current 397 188 $ 1,736 $ 1,333 Contract Liabilities Current $ 3,929 $ 5,963 Non-current 434 1,401 $ 4,363 $ 7,364 September 30, 2019 Estimate of when contract liabilities will be recognized as revenue within 12 months $ 3,929 within 12 to 24 months 434 greater than 24 months —

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2019
Discontinued Operations And Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations	Selected data for this discontinued business consisted of the following (in thousands): Three Months Ended September 30, 2019 September 30, 2018 Service revenue $ — $ 167 Product sales — 2,058 Total revenue — 2,225 Cost of services, exclusive of depreciation expense shown below — 87 Cost of product sales, exclusive of depreciation expense shown below — 1,944 Depreciation and amortization — 14 Other expense — (1 ) Operating income (loss) — 181 Adjustment to gain on sale (485 ) — Income (loss) from discontinued operations before income tax expense (485 ) 181 Income tax expense (benefit) (88 ) (27 ) Income (loss) from discontinued operations, net of income taxes $ (397 ) $ 208 Nine Months Ended September 30, 2019 September 30, 2018 Service revenue $ 1,165 $ 1,069 Product sales 4,233 3,768 Total revenue 5,398 4,837 Cost of services, exclusive of depreciation expense shown below 690 961 Cost of product sales, exclusive of depreciation expense shown below 3,196 4,124 Depreciation and amortization — 115 Other expense 91 22 Operating income (loss) 1,421 (385 ) Gain on sale 8,319 — Income (loss) from discontinued operations before income tax expense 9,740 (385 ) Income tax expense 1,907 81 Income (loss) from discontinued operations, net of income taxes $ 7,833 $ (466 ) September 30, 2019 December 31, 2018 Current assets $ — $ 3,712 Non-current assets — 1,848 Total assets $ — $ 5,560 Current liabilities $ — $ 1,633 Non-current liabilities — 82 Total liabilities $ — $ 1,715

Long-Term Debt, Net (Tables)

Long-Term Debt, Net (Tables)	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	Long-term debt is as follows (in thousands): September 30, 2019 December 31, 2018 Senior Notes $ 150,000 $ 150,000 Credit Facility 149,000 142,000 Total long-term debt 299,000 292,000 Less: Debt issuance costs (1,852 ) (2,230 ) Long-term debt, net $ 297,148 $ 289,770

Pension (Tables)

Pension (Tables)	9 Months Ended
	Sep. 30, 2019
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 Nine Months Ended September 30, September 30, 2019 2018 2019 2018 Service cost $ 191 $ 359 $ 572 $ 1,100 Interest cost 259 308 778 944 Expected return on plan assets (231 ) (266 ) (692 ) (815 ) Amortization of prior service cost (25 ) (19 ) (75 ) (58 ) Amortization of actuarial loss 15 84 44 252 Net periodic pension cost $ 209 $ 466 $ 627 $ 1,423

Equity (Tables)

Equity (Tables)	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Loss	Accumulated other comprehensive loss consisted of the following (in thousands): September 30, 2019 December 31, 2018 Prior service cost $ 537 $ 593 Unrecognized net actuarial loss (6,210 ) (6,243 ) Fair value of derivatives, net of tax (931 ) 194 Total accumulated other comprehensive loss $ (6,604 ) $ (5,456 )

Earnings per Share (Tables)

Earnings per Share (Tables)	9 Months Ended
	Sep. 30, 2019
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 Nine Months Ended September 30, September 30, 2019 2018 2019 2018 Weighted average basic common shares outstanding 44,371 44,216 44,349 44,199 Effect of dilutive securities: Performance shares 4 221 111 269 Restricted stock 341 154 394 145 Weighted average diluted common and potential common shares outstanding 44,716 44,591 44,854 44,613

Other (Income) Expense, Net (Ta

Other (Income) Expense, Net (Tables)	9 Months Ended
	Sep. 30, 2019
Other Income And Expenses [Abstract]
Schedule of Other Operating Cost and Expense, by Component	The components of other (income) expense, net, were as follows (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2019 2018 2019 2018 Gain on sale of assets $ (151 ) $ (136 ) $ (458 ) $ (643 ) Results of non-consolidated subsidiaries (96 ) (57 ) (193 ) (126 ) Foreign exchange 570 1,135 389 2,221 Rents and royalties (134 ) (264 ) (727 ) (500 ) Employment related charges — — 2,866 — Return on pension assets and other pension costs (232 ) (201 ) (714 ) (621 ) Acquisition-related costs — 623 — 623 Gain on sale of business — — (1,154 ) — Cost reduction and other charges — — 2,977 — Other, net (669 ) (970 ) (333 ) (784 ) Total other (income) expense, net $ (712 ) $ 130 $ 2,653 $ 170
Foreign Currency Gains Losses By Currency	Foreign exchange gains and losses are summarized in the following table (in thousands): Three Months Ended Nine Months Ended September 30, September 30, (Gains) losses by currency 2019 2018 2019 2018 British Pound $ 163 $ 89 $ 341 $ 65 Canadian Dollar 197 (113 ) 285 244 Euro 18 108 20 92 Other currencies, net 192 1,051 (257 ) 1,820 Total loss, net $ 570 $ 1,135 $ 389 $ 2,221

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Schedule of Components of Lease Expense	The components of lease expense are as follows (in thousands): Three months ended Nine months ended September 30, 2019 September 30, 2019 Lease Cost Operating lease cost $ 4,724 $ 14,027 Short-term lease cost 402 1,024 Variable lease cost 162 521 Total lease cost $ 5,288 $ 15,572 Other Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 4,306 $ 13,729 Right-of-use assets obtained in exchange for new lease obligations: Operating leases $ 3,837 $ 11,066 Weighted-average remaining lease term- operating leases 9.18 years 9.18 years Weighted-average discount rate - operating leases 4.95 % 4.95 %
Schedule of Undiscounted Cash Flows for Non-cancellable Leases	Scheduled undiscounted cash flows for non-cancellable leases at September 30, 2019 consist of the following (in thousands): Operating Leases Remainder of 2019 $ 4,132 2020 14,566 2021 12,130 2022 10,754 2023 9,193 Thereafter 43,842 Total undiscounted lease payments $ 94,617 Less: Imputed Interest (18,994 ) Total lease liabilities $ 75,623
Schedule of Minimum Rental Commitments Under Non-Cancellable Operating Leases	We adopted ASU 2017-06 using the cumulative effect transition method on January 1, 2019. As required, the following disclosure is provided for periods prior to adoption. Scheduled minimum rental commitments under non-cancellable operating leases at December 31, 2018, consist of the following (in thousands): Operating Leases 2019 $ 16,267 2020 12,572 2021 9,774 2022 7,955 2023 4,938 Thereafter 14,815 Total commitments $ 66,321

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Schedule of Derivative Liabilities at Fair Value	The fair values of outstanding derivative instruments are as follows (in thousands): Fair Value of Derivatives September 30, 2019 December 31, 2018 Balance Sheet Classification Derivatives designated as hedges: 5 year interest rate swap $ — $ 135 Other current assets 10 year interest rate swap (1,359 ) (70 ) Other long-term (liabilities) $ (1,359 ) $ 65
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss)	The effect of the interest rate swaps on the Consolidated Statement of Operations was as follows (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2019 2018 2019 2018 Income Statement Classification Derivatives designated as hedges: 5 year interest rate swap $ (24 ) $ (23 ) $ (120 ) $ (27 ) (Decrease) to interest expense 10 year interest rate swap 16 27 18 120 Increase to interest expense $ (8 ) $ 4 $ (102 ) $ 93

Financial Instruments (Tables)

Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value, by Balance Sheet Grouping	The following table summarizes the fair value balances (in thousands): Fair Value Measurement at September 30, 2019 Total Level 1 Level 2 Level 3 Assets: Deferred compensation assets (1) $ 44,630 $ — $ 44,630 $ — $ 44,630 $ — $ 44,630 $ — Liabilities: Deferred compensation plan $ 33,714 $ — $ 33,714 $ — 10 year 1,359 — 1,359 — $ 35,073 $ — $ 35,073 $ — Fair Value Measurement at December 31, 2018 Total Level 1 Level 2 Level 3 Assets: Deferred compensation assets (1) $ 42,161 $ — $ 42,161 $ — 5 year 135 — 135 — $ 42,296 $ — $ 42,296 $ — Liabilities: Deferred compensation plan $ 33,287 $ — $ 33,287 $ — 10 year 70 — 70 — $ 33,357 $ — $ 33,357 $ — (1) Deferred compensation 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)	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	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 September 30, 2019 Revenue from unaffiliated clients $ 109,339 $ 63,861 $ — $ 173,200 Inter-segment revenue 99 199 (298 ) — Segment operating income 18,835 11,456 916 31,207 Total assets (at end of period) 347,475 287,431 152,790 787,696 Capital expenditures 3,260 1,982 65 5,307 Depreciation and amortization 3,684 1,650 363 5,697 Three months ended September 30, 2018 Revenue from unaffiliated clients $ 103,609 $ 78,537 $ — $ 182,146 Inter-segment revenue 58 141 (199 ) — Segment operating income 14,956 19,243 680 34,879 Total assets (at end of period) 321,025 276,345 69,227 666,597 Capital expenditures 2,437 1,680 31 4,148 Depreciation and amortization 4,138 1,037 505 5,680 Nine months ended September 30, 2019 Revenue from unaffiliated clients $ 318,280 $ 193,152 $ — $ 511,432 Inter-segment revenue 346 419 (765 ) — Segment operating income 40,892 31,792 2,945 75,629 Total assets 347,475 287,431 152,790 787,696 Capital expenditures 7,906 9,114 517 17,537 Depreciation and amortization 11,505 4,377 1,188 17,070 Nine months ended September 30, 2018 Revenue from unaffiliated clients $ 306,525 $ 221,114 $ — $ 527,639 Inter-segment revenue 178 293 (471 ) — Segment operating income 44,473 55,357 814 100,644 Total assets 321,025 276,345 69,227 666,597 Capital expenditures 10,002 5,465 596 16,063 Depreciation and amortization 12,675 3,045 1,646 17,366 (1) "Corporate & Other" represents those items that are not directly related to a particular segment, eliminations and the assets and liabilities of discontinued operations.

Basis of Presentation (Details)

Basis of Presentation (Details)	9 Months Ended
	Sep. 30, 2019segment
Basis Of Presentation [Line Items]
Number of reportable segments	2
Maximum [Member]
Basis Of Presentation [Line Items]
Percentage of cost method investments	20.00%
Percentage of non controlling interest	100.00%

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Finished goods	$ 28,915	$ 26,636
Parts and materials	22,385	13,704
Work in progress	2,228	5,324
Total inventories	$ 53,528	$ 45,664

Contract Assets and Liabiliti_3

Contract Assets and Liabilities Changes in Net Contract Assets (Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Contract assets
Contract asset, current	$ 1,339	$ 1,145
Contract asset, non-current	397	188
Contract asset	1,736	1,333
Contract Liabilities
Contract liability, current	3,929	5,963
Contract liability, non-current	434	1,401
Contract liabilities	$ 4,363	$ 7,364

Contract Assets and Liabiliti_4

Contract Assets and Liabilities Current and Long-term Contract Liabilities (Details 1) $ in Thousands	Sep. 30, 2019USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-10-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract liability	$ 3,929
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract liability	$ 434
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract liability	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period

Contract Assets and Contract Li

Contract Assets and Contract Liabilities - Additional Information (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Revenue From Contract With Customer [Abstract]
Impairment losses on receivables	$ 0	$ 0
Impairment losses on contract assets	$ 0	$ 0

Acquisitions (Details)

Acquisitions (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Business Combinations [Abstract]
Consideration transferred		$ 48.9
Tangible assets acquired	$ 4.1
Intangible assets acquired	9.4
Goodwill, acquired during period	35.4
Increase in fair value of intangible assets	$ 0.9

Discontinued Operations - Addit

Discontinued Operations - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Divestiture of business	$ 16,600
Gain on divestiture, net of tax	8,300	$ 8,319
Cash provided by (used in) operating activities, discontinued operations		100	$ (500)
Cash provided by (used in) investing activities, discontinued operations		$ 14,800	$ 0
Maximum [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Additional proceeds from divestiture of business based on result of operations	$ 2,500

Discontinued Operations - Dispo

Discontinued Operations - Disposal Groups, Including Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Discontinued Operations And Disposal Groups [Abstract]
Service revenue		$ 167	$ 1,165	$ 1,069
Product sales		2,058	4,233	3,768
Total revenue		2,225	5,398	4,837
Cost of services, exclusive of depreciation expense shown below		87	690	961
Cost of product sales, exclusive of depreciation expense shown below		1,944	3,196	4,124
Depreciation and amortization		14		115
Other Expense (income)		(1)	91	22
Operating income (loss)		181	1,421	(385)
Adjustment to gain on sale	$ (485)
Gain on sale	8,300		8,319
Income (loss) from discontinued operations before income tax expense	(485)	181	9,740	(385)
Income tax expense (benefit)	(88)	(27)	1,907	81
Income (loss) from discontinued operations, net of income taxes	$ (397)	$ 208	$ 7,833	$ (466)
Current assets					$ 3,712
Non-current assets					1,848
Total assets					5,560
Current liabilities					1,633
Non-current liabilities					82
Total liabilities					$ 1,715

Long-Term Debt, Net - Additiona

Long-Term Debt, Net - Additional Information (Details)	9 Months Ended
	Sep. 30, 2019USD ($)SeriesNote	Dec. 31, 2014USD ($)instrument
Debt Instrument [Line Items]
Financing lease obligations	$ 0
Number of series of debt issued | SeriesNote	2
Maturity date	Jun. 19, 2023
Current borrowing capacity	$ 300,000,000
Uncommitted borrowings available	100,000,000
Maximum borrowing capacity	$ 400,000,000
Basis spread on variable rate	1.375%
Performance bonds under credit facility	$ 19,100,000
Remaining borrowing capacity	131,900,000
Performance bonds	$ 12,000,000
Interest Rate Swap [Member]
Debt Instrument [Line Items]
Derivative, number of instruments held | instrument		2
Derivative, notional amount		$ 50,000,000
Credit Facility [Member]
Debt Instrument [Line Items]
Interest coverage ratio, minimum	3.00%
Covenant leverage ratio, minimum	2.50%
Senior Notes [Member]
Debt Instrument [Line Items]
Face amount	$ 150,000,000
Senior Notes Series A [Member]
Debt Instrument [Line Items]
Face amount	$ 75,000,000
Interest rate, effective percentage	4.01%
Maturity date	Sep. 30, 2021
Senior Notes Series B [Member]
Debt Instrument [Line Items]
Face amount	$ 75,000,000
Interest rate, effective percentage	4.11%
Maturity date	Sep. 30, 2023
Maximum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%

Schedule of Long-term Debt Inst

Schedule of Long-term Debt Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term Debt	$ 299,000	$ 292,000
Debt Issuance Costs, Net	(1,852)	(2,230)
Long-term debt, net	297,148	289,770
Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt	150,000	150,000
Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 149,000	$ 142,000

Pension - Components of Net Per

Pension - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Compensation And Retirement Disclosure [Abstract]
Service cost	$ 191	$ 359	$ 572	$ 1,100
Interest cost	259	308	778	944
Expected return on plan assets	(231)	(266)	(692)	(815)
Amortization of prior service cost	(25)	(19)	(75)	(58)
Amortization of actuarial loss	15	84	44	252
Net periodic pension cost	$ 209	$ 466	$ 627	$ 1,423

Pension (Details)

Pension (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Compensation And Retirement Disclosure [Abstract]
Contributions by employer	$ 1.5

Equity (Narrative) (Details)

Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	Oct. 08, 2019	Aug. 31, 2019	May 31, 2019	Feb. 28, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Equity [Abstract]
Treasury stock, shares, acquired					8,397		24,453
Treasury stock, value					$ 411	$ 817	$ 1,502	$ 4,777
Treasury stock reissued					28,452		82,460
Cash Dividends per Share		$ 0.55	$ 0.55	$ 0.55	$ 0.55	$ 0.55	$ 1.65	$ 1.65
Dividends payable, date declared	Oct. 8, 2019
Dividends declared (in dollars per share)	$ 0.55
Dividends payable, date of record	Oct. 18, 2019
Dividends payable, date to be paid	Nov. 19, 2019

Equity Accumulated Other Compre

Equity Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Equity [Abstract]
Prior service cost	$ 537	$ 593
Unrecognized net actuarial loss	(6,210)	(6,243)
Fair value of derivatives, net of tax	(931)	194
Total accumulated other comprehensive loss	$ (6,604)	$ (5,456)

Earnings per Share (Details)

Earnings per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Weighted average basic common shares outstanding	44,371	44,216	44,349	44,199
Performance shares	4	221	111	269
Restricted stock	341	154	394	145
Weighted average diluted common and potential common shares outstanding	44,716	44,591	44,854	44,613

Other (Income) Expense, Net (De

Other (Income) Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other (Income) Expense [Line Items]
Other (Income) expense, net	$ (712)	$ 130	$ 2,653	$ 170
Gain on sale of assets [Member]
Other (Income) Expense [Line Items]
Other (Income) expense, net	(151)	(136)	(458)	(643)
Results of non-consolidated subsidiaries [Member]
Other (Income) Expense [Line Items]
Other (Income) expense, net	(96)	(57)	(193)	(126)
Foreign exchange [Member]
Other (Income) Expense [Line Items]
Other (Income) expense, net	570	1,135	389	2,221
Rents and royalties [Member]
Other (Income) Expense [Line Items]
Other (Income) expense, net	(134)	(264)	(727)	(500)
Employment-related charges [Member]
Other (Income) Expense [Line Items]
Other (Income) expense, net			2,866
Return on pension assets and other pension costs [Member]
Other (Income) Expense [Line Items]
Other (Income) expense, net	(232)	(201)	(714)	(621)
Acquisition-related costs [Member]
Other (Income) Expense [Line Items]
Other (Income) expense, net		623		623
Gain on sale of business [Member]
Other (Income) Expense [Line Items]
Other (Income) expense, net			(1,154)
Cost reduction and other charges [Member]
Other (Income) Expense [Line Items]
Other (Income) expense, net			2,977
Other, net [Member]
Other (Income) Expense [Line Items]
Other (Income) expense, net	$ (669)	$ (970)	$ (333)	$ (784)

Other (Income) Expense Foreign

Other (Income) Expense Foreign Currency Gain Loss by Currency (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other (Income) Expense [Line Items]
Gain (loss) by currency	$ 570	$ 1,135	$ 389	$ 2,221
British Pound [Member]
Other (Income) Expense [Line Items]
Gain (loss) by currency	163	89	341	65
Canadian Dollar [Member]
Other (Income) Expense [Line Items]
Gain (loss) by currency	197	(113)	285	244
Euro [Member]
Other (Income) Expense [Line Items]
Gain (loss) by currency	18	108	20	92
Other Currencies Net [Member]
Other (Income) Expense [Line Items]
Gain (loss) by currency	$ 192	$ 1,051	$ (257)	$ 1,820

Other (Income) Expense, Net - A

Other (Income) Expense, Net - Additional Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Other Income And Expenses [Abstract]
Proceeds from sale of business	$ 2,980

Income Tax Expense (Details)

Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Expense [Line Items]
Effective income tax rate	12.10%		29.80%	(30.20%)	21.70%
Income tax expense (benefit)	$ 3,335		$ 9,404	$ (19,467)	$ 19,697
Increase (decrease) in income tax expense compared to the same period in 2018	$ (6,100)
Income tax expense (benefit) related to unremitted earnings of foreign subsidiaries		$ 26,700
Corporate Restructuring [Member]
Income Tax Expense [Line Items]
Income tax expense (benefit)		$ (58,500)

Leases - Schedule of Components

Leases - Schedule of Components of Lease Expense (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2019USD ($)
Lease Cost
Operating lease cost	$ 4,724	$ 14,027
Short-term lease cost	402	1,024
Variable lease cost	162	521
Total lease cost	5,288	15,572
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	4,306	13,729
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases	$ 3,837	$ 11,066
Weighted-average remaining lease term- operating leases	9 years 2 months 4 days	9 years 2 months 4 days
Weighted-average discount rate - operating leases	4.95%	4.95%

Leases - Schedule of Undiscount

Leases - Schedule of Undiscounted Cash Flows for Non-cancellable Leases (Details) $ in Thousands	Sep. 30, 2019USD ($)
Leases [Abstract]
Operating Leases, Remainder of 2019	$ 4,132
Operating Leases, 2020	14,566
Operating Leases, 2021	12,130
Operating Leases, 2022	10,754
Operating Leases, 2023	9,193
Operating Leases, Thereafter	43,842
Operating Leases, Total undiscounted lease payments	94,617
Operating Leases, Less: Imputed Interest	(18,994)
Operating Leases, Lease Liabilities	$ 75,623

Leases - Schedule of Minimum Re

Leases - Schedule of Minimum Rental Commitments Under Non-Cancellable Operating Leases (Details) $ in Thousands	Dec. 31, 2018USD ($)
Operating Leases, Future Minimum Payments Due [Abstract]
2019	$ 16,267
2020	12,572
2021	9,774
2022	7,955
2023	4,938
Thereafter	14,815
Total commitments	$ 66,321

Leases (Details)

Leases (Details)	Sep. 30, 2019USD ($)
Leases [Abstract]
ROU asset	$ 0
ROU Lease liability	$ 0

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Additional Information (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2019USD ($)	Dec. 31, 2014USD ($)instrument
Derivatives, Fair Value [Line Items]
Basis spread on variable rate	1.375%
Excess line of credit facility subject to interest rate risk	$ 25,000,000
Long-term debt, percentage bearing fixed interest, amount	175,000,000
Long-term debt, percentage bearing variable interest, amount	$ 124,000,000
Maximum [Member]
Derivatives, Fair Value [Line Items]
Basis spread on variable rate	2.00%
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative, number of instruments held | instrument		2
Derivative, notional amount		$ 50,000,000
Derivative, amount of hedged item		$ 50,000,000
Interest Rate Swap No. 2 [Member]
Derivatives, Fair Value [Line Items]
Derivative, fixed interest rate		2.50%
Derivative, maturity date		Aug. 29, 2024
Interest Rate Swap No. 1 [Member]
Derivatives, Fair Value [Line Items]
Derivative, notional amount		$ 25,000,000
Derivative, maturity date		Aug. 29, 2019

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities Derivative Gain (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Interest Rate Swap No. 2 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, term of contract			5 years		5 years
Fair value of interest rate derivatives					$ 135
Unrealized gain (loss) on interest rate cash flow hedges	$ (24)	$ (23)	$ (120)	$ (27)
Interest Rate Swap No. 1 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, term of contract			10 years		10 years
Fair value of interest rate derivatives	(1,359)		$ (1,359)		$ (70)
Unrealized gain (loss) on interest rate cash flow hedges	16	27	18	120
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of interest rate derivatives	(1,359)		(1,359)		$ 65
Unrealized gain (loss) on interest rate cash flow hedges	$ (8)	$ 4	$ (102)	$ 93

Financial Instruments (Details)

Financial Instruments (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation trust assets	$ 44,630	$ 42,161
Deferred compensation plan, asset	44,630	42,296
Deferred compensation liability	33,714	33,287
Deferred compensation plan, liability	35,073	33,357
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation trust assets	0	0
Deferred compensation plan, asset	0	0
Deferred compensation liability	0	0
Deferred compensation plan, liability	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation trust assets	44,630	42,161
Deferred compensation plan, asset	44,630	42,296
Deferred compensation liability	33,714	33,287
Deferred compensation plan, liability	35,073	33,357
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred compensation trust assets	0	0
Deferred compensation plan, asset	0	0
Deferred compensation liability	0	0
Deferred compensation plan, liability	$ 0	$ 0
Interest Rate Swap No. 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative, term of contract	5 years	5 years
Fair value of interest rate derivatives		$ 135
Interest Rate Swap No. 2 [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of interest rate derivatives		$ 0
Interest Rate Swap No. 2 [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative, term of contract		5 years
Fair value of interest rate derivatives		$ 135
Interest Rate Swap No. 2 [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of interest rate derivatives		$ 0
Interest Rate Swap No. 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative, term of contract	10 years	10 years
Fair value of interest rate derivatives	$ (1,359)	$ (70)
Fair value of interest rate derivatives	1,359	70
Interest Rate Swap No. 1 [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of interest rate derivatives	$ 0	$ 0
Interest Rate Swap No. 1 [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative, term of contract	10 years	10 years
Fair value of interest rate derivatives	$ 1,359	$ 70
Interest Rate Swap No. 1 [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of interest rate derivatives	$ 0	$ 0

Segment Reporting (Details)

Segment Reporting (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)segment	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			2
Revenue	$ 173,200	$ 182,146	$ 511,432	$ 527,639
Segment operating income	31,207	34,879	75,629	100,644
Total assets (at end of period)	787,696	666,597	787,696	666,597	$ 648,827
Capital expenditures	5,307	4,148	17,537	16,063
Depreciation and amortization	5,697	5,680	17,070	17,366
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue	0	0	0	0
Reservoir Description [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue	109,339	103,609	318,280	306,525
Segment operating income	18,835	14,956	40,892	44,473
Total assets (at end of period)	347,475	321,025	347,475	321,025
Capital expenditures	3,260	2,437	7,906	10,002
Depreciation and amortization	3,684	4,138	11,505	12,675
Reservoir Description [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue	99	58	346	178
Production Enhancement [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue	63,861	78,537	193,152	221,114
Segment operating income	11,456	19,243	31,792	55,357
Total assets (at end of period)	287,431	276,345	287,431	276,345
Capital expenditures	1,982	1,680	9,114	5,465
Depreciation and amortization	1,650	1,037	4,377	3,045
Production Enhancement [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue	199	141	419	293
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenue	0	0
Segment operating income	916	680	2,945	814
Total assets (at end of period)	152,790	69,227	152,790	69,227
Capital expenditures	65	31	517	596
Depreciation and amortization	363	505	1,188	1,646
Corporate and Other [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue	$ (298)	$ (199)	$ (765)	$ (471)

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Operating Leases, Lease Liabilities	$ 75,623
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Operating lease right-of-use assets		$ 77,500
Operating Leases, Lease Liabilities		$ 77,500
Minimum [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Term of lease	12 months