Oil States International (OIS) 10-K 22 Feb 21 2020 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 12, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-16337
Entity Registrant Name	Oil States International, Inc
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	76-0476605
Entity Address, Address Line One	Three Allen Center, 333 Clay Street
Entity Address, Address Line Two	Suite 4620
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77002
City Area Code	713
Local Phone Number	652-0582
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	OIS
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 269,623,004
Entity Common Stock, Shares Outstanding		61,043,197
Documents Incorporated by Reference	Portions of the registrant's Definitive Proxy Statement for the 2021 Annual Meeting of Stockholders, which the registrant intends to file with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10‑K, are incorporated by reference into Part III of this Annual Report on Form 10‑K.
Entity Central Index Key	0001121484
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues:
Revenues	$ 638,075	$ 1,017,354	$ 1,088,133
Costs and expenses:
Cost of revenues (exclusive of depreciation and amortization expense presented below)	561,805	802,589	834,513
Selling, general and administrative expenses	94,102	122,932	138,070
Depreciation and amortization expense	98,543	123,319	123,530
Impairments of goodwill	406,056	165,000	0
Impairments of fixed and lease assets	12,447	33,697	0
Other operating income, net	(538)	(2,003)	(2,104)
Costs and expenses	1,172,415	1,245,534	1,094,009
Operating loss	(534,340)	(228,180)	(5,876)
Interest expense	(14,259)	(17,898)	(19,314)
Interest income	390	262	319
Other income, net	13,880	5,089	3,139
Loss before income taxes	(534,329)	(240,727)	(21,732)
Income tax benefit	65,946	8,919	2,627
Net loss	$ (468,383)	$ (231,808)	$ (19,105)
Net loss per share:
Basic (in dollars per share)	$ (7.83)	$ (3.90)	$ (0.33)
Diluted (in dollars per share)	$ (7.83)	$ (3.90)	$ (0.33)
Weighted average number of common shares outstanding:
Basic (in shares)	59,812	59,379	58,712
Diluted (in shares)	59,812	59,379	58,712
Products
Revenues:
Revenues	$ 331,272	$ 483,359	$ 501,822
Costs and expenses:
Cost of revenues (exclusive of depreciation and amortization expense presented below)	287,615	369,194	366,453
Service
Revenues:
Revenues	306,803	533,995	586,311
Costs and expenses:
Cost of revenues (exclusive of depreciation and amortization expense presented below)	$ 274,190	$ 433,395	$ 468,060

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (468,383)	$ (231,808)	$ (19,105)
Other comprehensive income (loss):
Currency translation adjustments, net of tax	(3,750)	3,462	(13,088)
Other	111	189	184
Total other comprehensive income (loss)	(3,639)	3,651	(12,904)
Comprehensive loss	$ (472,022)	$ (228,157)	$ (32,009)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 72,011	$ 8,493
Accounts receivable, net	163,135	233,487
Inventories, net	170,376	221,342
Prepaid expenses and other current assets	18,071	20,107
Total current assets	423,593	483,429
Property, plant and equipment, net	383,562	459,724
Operating lease assets, net	33,140	43,616
Goodwill, net	76,489	482,306
Other intangible assets, net	205,749	230,091
Other noncurrent assets	29,727	28,701
Total assets	1,152,260	1,727,867
Current liabilities:
Current portion of long-term debt	17,778	25,617
Accounts payable	46,433	78,368
Accrued liabilities	44,504	48,840
Current operating lease liabilities	7,620	8,311
Income taxes payable	2,413	4,174
Deferred revenue	43,384	17,761
Total current liabilities	162,132	183,071
Long-term debt	165,759	222,552
Long-term operating lease liabilities	29,166	35,777
Deferred income taxes	14,263	38,079
Other noncurrent liabilities	23,309	24,421
Total liabilities	394,629	503,900
Stockholders' equity:
Common stock, $0.01 par value, 200,000,000 shares authorized, 73,288,976 shares and 72,546,321 shares issued, respectively	733	726
Additional paid-in capital	1,122,945	1,114,521
Retained earnings	329,327	797,710
Accumulated other comprehensive loss	(71,385)	(67,746)
Treasury stock, at cost, 12,283,817 and 12,045,065 shares, respectively	(623,989)	(621,244)
Total stockholders' equity	757,631	1,223,967
Total liabilities and stockholders' equity	$ 1,152,260	$ 1,727,867

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	73,288,976	72,546,321
Treasury stock, shares (in shares)	12,283,817	12,045,065

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	1.5% Convertible Unsecured Senior Notes	1.5% Convertible Unsecured Senior NotesConvertible Debt	Common Stock	Additional Paid‑In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning balance at Dec. 31, 2017	$ 1,132,713			$ 627	$ 754,607	$ 1,048,623	$ (58,493)	$ (612,651)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(19,105)					(19,105)
Currency translation adjustment (excluding intercompany advances)	(10,984)						(10,984)
Currency translation adjustment on intercompany advances	(2,104)						(2,104)
Other comprehensive income	184						184
Stock-based compensation expense:
Restricted stock	22,157			4	22,153
Stock options	492				492
Issuance of common stock in connection with GEODynamics Acquisition	294,910			87	294,823
Issuance of 1.50% convertible senior notes, net of income taxes of $7,744	25,683				25,683
Surrender of stock to settle taxes on restricted stock awards	(4,178)							(4,178)
Ending balance at Dec. 31, 2018	1,439,768			718	1,097,758	1,029,518	(71,397)	(616,829)
Stock-based compensation expense:
Stated interest rate		1.50%	1.50%
Net loss	(231,808)					(231,808)
Currency translation adjustment (excluding intercompany advances)	3,925						3,925
Currency translation adjustment on intercompany advances	(463)						(463)
Other comprehensive income	189						189
Restricted stock	16,715			8	16,707
Stock options	53				53
Stock repurchases	(757)							(757)
Surrender of stock to settle taxes on restricted stock awards	(3,698)							(3,698)
Common stock withdrawn from deferred compensation plan	43				3			40
Ending balance at Dec. 31, 2019	1,223,967			726	1,114,521	797,710	(67,746)	(621,244)
Stock-based compensation expense:
Stated interest rate		1.50%
Net loss	(468,383)					(468,383)
Currency translation adjustment (excluding intercompany advances)	2,065						2,065
Currency translation adjustment on intercompany advances	(5,815)						(5,815)
Other comprehensive income	111						111
Restricted stock	8,431			7	8,424
Surrender of stock to settle taxes on restricted stock awards	(2,745)							(2,745)
Ending balance at Dec. 31, 2020	$ 757,631			$ 733	$ 1,122,945	$ 329,327	$ (71,385)	$ (623,989)
Stock-based compensation expense:
Stated interest rate		1.50%	1.50%

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - 1.5% Convertible Unsecured Senior Notes $ in Thousands	Dec. 31, 2018USD ($)
Stated interest rate	1.50%
Debt instrument, convertible, deferred taxes	$ 7,744
Convertible Debt
Stated interest rate	1.50%

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net loss	$ (468,383)	$ (231,808)	$ (19,105)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization expense	98,543	123,319	123,530
Impairments of goodwill	406,056	165,000	0
Impairments of inventories	31,151	0	0
Impairments of fixed and lease assets	12,447	33,697	0
Stock-based compensation expense	8,431	16,768	22,649
Amortization of debt discount and deferred financing costs	7,736	7,884	7,408
Deferred income tax benefit	(24,404)	(15,469)	(3,489)
Gains on extinguishment of 1.50% convertible senior notes	(10,721)	0	0
Gains on disposals of assets	(2,444)	(4,291)	(6,288)
Other, net	4,668	3,079	1,411
Changes in operating assets and liabilities, net of effect from acquired businesses:
Accounts receivable	63,876	50,257	(16,792)
Inventories	17,578	(10,774)	(7,283)
Accounts payable and accrued liabilities	(37,315)	(6,173)	5,796
Deferred revenue	25,549	3,470	(4,808)
Other operating assets and liabilities, net	(13)	2,473	141
Net cash flows provided by operating activities	132,755	137,432	103,170
Cash flows from investing activities:
Capital expenditures	(12,749)	(56,116)	(88,024)
Proceeds from disposition of property, plant and equipment	9,601	6,046	3,659
Acquisitions of businesses, net of cash acquired	0	0	(379,676)
Proceeds from flood insurance claims	0	0	3,850
Other, net	(581)	(1,912)	(1,184)
Net cash flows used in investing activities	(3,729)	(51,982)	(461,375)
Cash flows from financing activities:
Revolving credit facility borrowings	72,173	246,828	835,467
Revolving credit facility repayments	(105,104)	(331,041)	(699,322)
Issuance of 1.50% convertible senior notes	0	0	200,000
Purchases of 1.50% convertible senior notes	(20,078)	(6,724)	0
Other debt and finance lease repayments, net	(8,222)	(500)	(537)
Payment of financing costs	(1,041)	(16)	(7,372)
Shares added to treasury stock as a result of net share settlements due to vesting of restricted stock	(2,745)	(3,698)	(4,178)
Purchases of treasury stock	0	(757)	0
Net cash flows (used in) provided by financing activities	(65,017)	(95,908)	324,058
Effect of exchange rate changes on cash and cash equivalents	(491)	(365)	4
Net change in cash and cash equivalents	63,518	(10,823)	(34,143)
Cash and cash equivalents, beginning of year	8,493	19,316	53,459
Cash and cash equivalents, end of year	72,011	8,493	19,316
Cash paid (received) for:
Interest	6,402	9,626	9,864
Income taxes, net	$ (36,766)	$ (1,303)	$ 2,993

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parenthetical) - 1.5% Convertible Unsecured Senior Notes	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stated interest rate	1.50%	1.50%	1.50%
Convertible Debt
Stated interest rate	1.50%		1.50%

Organization and Basis of Prese

Organization and Basis of Presentation	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation The Consolidated Financial Statements include the accounts of Oil States International, Inc. ("Oil States" or the "Company") and its consolidated subsidiaries. Investments in unconsolidated affiliates, in which the Company is able to exercise significant influence, are accounted for using the equity method. All significant intercompany accounts and transactions between the Company and its consolidated subsidiaries have been eliminated in the accompanying consolidated financial statements. Certain prior-year amounts in the Company's consolidated financial statements have been reclassified to conform to the current year presentation. The Company, through its subsidiaries, is a leading provider of specialty products and services to oil and gas and industrial companies throughout the world. The Company operates in a substantial number of the world's active resource intensive regions, including: onshore and offshore United States, West Africa, the North Sea, the Middle East, South America and Southeast and Central Asia. The Company operates through three business segments – Well Site Services, Downhole Technologies and Offshore/Manufactured Products. On January 12, 2018, the Company acquired GEODynamics, Inc., ("GEODynamics" and the "GEODynamics Acquisition"). These acquired operations are reported as the Downhole Technologies segment. On February 28, 2018, the Company acquired Falcon Flowback Services, LLC ("Falcon"), which was integrated into the Completion Services business unit. There have been no other changes in reporting structure.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Use of Estimates As further discussed in Note 14, "Commitments and Contingencies," the impact of the Coronavirus Disease 2019 ("COVID-19") pandemic and the related economic, business and market disruptions continues to evolve and its future effects remain uncertain. The actual impact of these developments on the Company will depend on numerous factors, many of which are beyond management's control and knowledge. It is therefore difficult for management to assess or predict with precision the broad future effect of this health crisis on the global economy, the energy industry or the Company. During 2020, the Company recorded asset impairments, severance and restructuring charges in response to these recent developments, as further discussed in Note 3, "Asset Impairments and Other Charges." As additional information becomes available, events or circumstances change and strategic operational decisions are made by management, further adjustments may be required which could have a material adverse impact on the Company's consolidated financial position, results of operations and cash flows. The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States requires the use of estimates and assumptions by management in determining the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Examples of such estimates include goodwill and long-lived asset impairments, revenue and income recognized over time, valuation allowances recorded on deferred tax assets, the fair value of assets and liabilities acquired including identification of associated goodwill and intangible assets, reserves on inventory, allowances for doubtful accounts, settlement of litigation and potential future adjustments related to contractual indemnification and other agreements. Actual results could materially differ from those estimates. Cash and Cash Equivalents All highly liquid investments purchased with an original maturity of three months or less are classified as cash equivalents. Fair Value of Financial Instruments Financial instruments consist of cash and cash equivalents, investments, receivables, payables and debt instruments. The carrying values of these instruments, other than the 1.50% convertible senior notes due February 2023 (the "Notes") described in Note 7, "Long-term Debt," on the accompanying consolidated balance sheets, approximates their fair values. The estimated fair value of the Notes as of December 31, 2020 was $120.6 million, based on quoted market prices (a Level 2 fair value measurement), which compares to $157.4 million principal amount of the Notes. Inventories Inventories consist of consumable oilfield products, manufactured equipment, spare parts for manufactured equipment, and work-in-process. Inventories also include raw materials, labor, subcontractor charges, manufacturing overhead and supplies and are carried at the lower of cost or net realizable value. The cost of inventories is determined on an average cost or specific-identification method. A reserve for excess and/or obsolete inventory is maintained based on the age, turnover, condition, expected near-term utility and market pricing of the goods. Property, Plant, and Equipment Property, plant, and equipment are recorded at cost, or at estimated fair market value at acquisition date if acquired in a business combination, and depreciation is computed, for assets owned or recorded under a finance lease, using the straight-line method over the estimated useful lives of the assets, after allowing for estimated salvage value where applicable. Leasehold improvements are capitalized and amortized over the lesser of the life of the lease or the estimated useful life of the asset. Expenditures for repairs and maintenance are charged to expense when incurred. Expenditures for major renewals and betterments, which extend the useful lives of existing equipment, are capitalized and depreciated. Upon retirement or disposition of property and equipment, the cost and related accumulated depreciation are removed from the accounts and any resulting gain or loss is recognized in the statements of operations. Goodwill Goodwill represents the excess after impairments, if applicable, of the purchase price for acquired businesses over the allocated fair value of related net assets. In accordance with current accounting guidance, the Company does not amortize goodwill, but rather assesses goodwill for impairment annually and when an event occurs or circumstances change that indicate the carrying amounts may not be recoverable. In the evaluation of goodwill, each reporting unit with goodwill on its balance sheet is assessed separately using relevant events and circumstances. Management estimates the fair value of each reporting unit and compares that fair value to its recorded carrying value. Management utilizes, depending on circumstances, a combination of valuation methodologies including a market approach and an income approach, as well as guideline public company comparables. Projected cash flows are discounted using a long-term weighted average cost of capital for each reporting unit based on estimates of investment returns that would be required by a market participant. As part of the process of assessing goodwill for potential impairment, the total market capitalization of the Company is compared to the sum of the fair values of all reporting units to assess the reasonableness of aggregated fair values. If the carrying amount of a reporting unit exceeds its fair value, goodwill is considered impaired and an impairment loss is recorded. As further discussed in Note 6, "Goodwill and Other Intangible Assets," the Company recognized non-cash goodwill impairment charges of $406.1 million in the first quarter of 2020 and $165.0 million in the fourth quarter of 2019. These impairment charges did not impact the Company's liquidity position, debt covenants or cash flows. Long-Lived Assets The Company amortizes the cost of long-lived assets, including finite-lived intangible assets, over their estimated useful life. The recoverability of the carrying values of long-lived assets is assessed at the asset group level whenever, in management's judgment, events or changes in circumstances indicate that the carrying value of such asset groups may not be recoverable based on estimated undiscounted future cash flows. If this assessment indicates that the carrying values will not be recoverable, an impairment loss equal to the excess of the carrying value over the fair value of the asset group is recognized. The fair value of the asset group is based on appraised values, prices of similar assets (if available), or discounted cash flows. As further discussed in Note 4, "Details of Selected Balance Sheet Accounts," and Note 8, "Operating Leases," the Company recognized non-cash asset impairment charges totaling $12.4 million and $33.7 million in 2020 and 2019, respectively, to reduce the carrying value of certain equipment and facilities (owned and leased) to their estimated realizable value. Based on the Company's review, the carrying values of its other long-lived assets are recoverable, and no impairment losses were recorded during the periods presented. Leases The Company leases a portion of its facilities, office space, equipment and vehicles under contracts which provide it with the right to control identified assets. The Company recognizes the right to use identified assets under operating leases (with an initial term of greater than 12 months) as operating lease assets and the related obligations to make payments under the lease arrangements as operating lease liabilities. Finance lease obligations, which are not material, are classified within long-term debt while related assets are included within property, plant and equipment. Lease assets and liabilities are recorded at the commencement date based on the present value of lease payments over the lease term. The Company has lease agreements with lease and non-lease components, which are generally accounted for as a single lease component. Most of the Company's leases do not provide an implicit interest rate. Therefore, the Company's incremental borrowing rate, based on available information at the lease commencement date, is used to determine the present value of lease payments. Most of the Company's operating leases include one or more options to renew, with renewal terms that can extend the lease term from one Research and Development Costs Costs incurred internally in researching and developing products are charged to expense until technological feasibility has been established for the product. Research and development expenses totaled $6.1 million, $7.0 million and $6.6 million in 2020, 2019 and 2018, respectively, and are reported within cost of revenues in the accompanying consolidated statements of operations. Foreign Currency and Other Comprehensive Loss Gains and losses resulting from balance sheet translation of international operations where the local currency is the functional currency are included as a component of accumulated other comprehensive loss within stockholders' equity and represent substantially all of the accumulated other comprehensive loss balance. Remeasurements of intercompany advances denominated in a currency other than the functional currency of the entity that are of a long-term investment nature are recognized as a separate component of other comprehensive loss within stockholders' equity. Gains and losses resulting from balance sheet remeasurements of assets and liabilities denominated in a different currency than the functional currency, other than intercompany advances that are of a long-term investment nature, are included in the consolidated statements of operations within "other operating income, net" as incurred and were not material during the periods presented. Currency Exchange Rate Risk A portion of revenues, earnings and net investments in operations outside the United States are exposed to changes in currency exchange rates. The Company seeks to manage its currency exchange risk in part through operational means, including managing expected local currency revenues in relation to local currency costs and local currency assets in relation to local currency liabilities. In order to reduce exposure to fluctuations in currency exchange rates, the Company may enter into currency exchange agreements with financial institutions. As of December 31, 2020 and 2019, the Company had no outstanding foreign currency forward purchase contracts. Revenue and Cost Recognition The Company's revenue contracts may include one or more promises to transfer a distinct good or service to the customer, which is referred to as a "performance obligation," and to which revenue is allocated. The Company recognizes revenue and the related cost when, or as, the performance obligations are satisfied. The majority of significant contracts for custom engineered products have a single performance obligation as no individual good or service is separately identifiable from other performance obligations in the contracts. For contracts with multiple distinct performance obligations, the Company allocates revenue to the identified performance obligations in the contract. The Company's product sales terms do not include significant post-performance obligations. The Company's performance obligations may be satisfied at a point in time or over time as work progresses. Revenues from products and services transferred to customers at a point in time accounted for approximately 38%, 34% and 29% of consolidated revenues for the years ended December 31, 2020, 2019 and 2018, respectively. The majority of the Company's revenue recognized at a point in time is derived from short-term contracts for standard products. Revenue on these contracts is recognized when control over the product has transferred to the customer. Indicators the Company considers in determining when transfer of control to the customer occurs include: right to payment for the product, transfer of legal title to the customer, transfer of physical possession of the product, transfer of risk and customer acceptance of the product. Revenues from products and services transferred to customers over time accounted for approximately 62%, 66% and 71% of consolidated revenues for the years ended December 31, 2020, 2019 and 2018, respectively. The majority of the Company's revenue recognized over time is for services provided under short-term contracts, with revenue recognized as the customer receives and consumes the services. In addition, the Company manufactures certain products to individual customer specifications under short-term contracts for which control passes to the customer as the performance obligations are fulfilled and for which revenue is recognized over time. For significant project-related contracts involving custom engineered products within the Offshore/Manufactured Products segment (also referred to as "project-driven products"), revenues are typically recognized over time using an input measure such as the percentage of costs incurred to date relative to total estimated costs at completion for each contract (cost-to-cost method). Contract costs include labor, material and overhead. Management believes this method is the most appropriate measure of progress on large contracts. Billings on such contracts in excess of costs incurred and estimated profits are classified as a contract liability (deferred revenue). Costs incurred and estimated profits in excess of billings on these contracts are recognized as a contract asset (a component of accounts receivable). Contract estimates for project-related contracts involving custom engineered products are based on various assumptions to project the outcome of future events that may span several years. Changes in assumptions that may affect future project costs and margins include production efficiencies, the complexity of the work to be performed and the availability and costs of labor, materials and subcomponents. As a significant change in one or more of these estimates could affect the profitability of the Company's contracts, contract-related estimates are reviewed regularly. The Company recognizes adjustments in estimated costs and profits on contracts in the period the adjustment is identified. Revenue and profit in future periods of contract performance are recognized using the adjusted estimate. If at any time the estimate of contract profitability indicates an anticipated loss will be incurred on the contract, the full loss is recognized in the period it is identified. Product costs and service costs include all direct material and labor costs and those costs related to contract performance, such as indirect labor, supplies, tools and repairs. As disclosed in the consolidated statements of operations, product costs and service costs exclude depreciation and amortization expense and impairment of fixed assets, which are separately presented. Selling, general and administrative costs are charged to expense as incurred. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, and that are collected by the Company from a customer, are excluded from revenue. Shipping and handling costs associated with outbound freight after control over a product has transferred to a customer are accounted for as a fulfillment cost and are included in cost of products. Proceeds from customers for the cost of oilfield rental equipment that is damaged or lost downhole are reflected as gains or losses on the disposition of assets after considering the write-off of the remaining net book value of the equipment. As of December 31, 2020, the Company had $161.9 million of remaining backlog related to contracts with an original expected duration of greater than one year. Approximately 53% of this remaining backlog is expected to be recognized as revenue in 2021 and the balance thereafter. Income Taxes The Company follows the liability method of accounting for income taxes. Under this method, deferred income taxes are recorded based upon the differences between the financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws in effect at the time the underlying assets or liabilities are recovered or settled. As further discussed in Note 9, "Income Taxes," on December 22, 2017, legislation commonly known as the Tax Cuts and Jobs Act ("Tax Reform Legislation") was signed into law which enacted significant changes to U.S. tax and related laws, including certain key U.S. federal income tax provisions applicable to oilfield service and manufacturing companies such as the Company. In accordance with the Securities and Exchange Commission's Staff Accounting Bulletin No. 118, the Company recorded provisional estimates to reflect the effect of the Tax Reform Legislation on the Company's income tax assets and liabilities as of December 31, 2017. During 2018, the Company adjusted these provisional estimates based upon additional guidance issued by the Internal Revenue Service. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security ("CARES") Act was signed into law, which allowed the carryback of U.S. federal net operating losses. Prior to the enactment of the CARES Act, such tax losses could only be carried forward. As of December 31, 2020, the Company's total investment in foreign subsidiaries is considered to be indefinitely reinvested outside of the United States. The Company accounts for the U.S. tax effect of global intangible low-taxed income earned by foreign subsidiaries in the period that such income is earned. The Company records a valuation allowance in the reporting period when management believes that it is more likely than not that any deferred tax asset will not be realized. This assessment requires analysis of changes in tax laws as well as available positive and negative evidence, including consideration of losses in recent years, reversals of temporary differences, forecasts of future income and assessment of future business and tax planning strategies. During 2020, 2019 and 2018, the Company recorded valuation allowances primarily with respect to foreign and U.S. state net operating loss ("NOL") carryforwards. The calculation of tax liabilities involves assessing uncertainties regarding the application of complex tax regulations. The Company recognizes liabilities for tax expenses based on estimates of whether, and the extent to which, additional taxes will be due. If management ultimately determines that payment of these amounts is unnecessary, the liability is reversed and a tax benefit is recognized during the period in which management determines that the liability is no longer necessary. An additional charge is recorded as a provision for taxes in the period in which management determines that the recorded tax liability is less than the expected ultimate assessment. Receivables and Concentration of Credit Risk Based on the nature of its customer base, the Company does not believe that it has any significant concentrations of credit risk other than its concentration in the worldwide oil and gas industry. Note 15, "Segments and Related Information," provides further information with respect to the Company's geographic revenues and significant customers. The Company evaluates the credit-worthiness of significant customers' financial condition and, generally, the Company does not require significant collateral from its customers. Allowances for Doubtful Accounts The Company maintains allowances for estimated losses resulting from the inability of the Company's customers to make required payments. Determination of the collectability of amounts due from customers requires management to make judgments regarding future events and trends. Allowances for doubtful accounts are established through an assessment of the Company's portfolio on an individual customer and consolidated basis taking into account current and expected future market conditions and trends. This process consists of a thorough review of historical collection experience, current aging status of customer accounts, and financial condition of the Company's customers as well as political and economic factors in countries of operations and other customer-specific factors. Based on a review of these factors, the Company establishes or adjusts allowances for trade and unbilled receivables as well as contract assets. If the financial condition of the Company's customers were to deteriorate further, adversely affecting their ability to make payments, additional allowances may be required. If a customer receivable is deemed to be uncollectible, the receivable is charged-off against allowance for doubtful accounts. Earnings per Share Basic earnings per share ("EPS") on the face of the accompanying consolidated statements of operations is computed by dividing the net income or loss applicable to the Company's common stockholders by the weighted average shares of outstanding common stock. The calculation of diluted EPS is similar to basic EPS, except that the denominator includes dilutive common stock equivalents and the income or loss in the numerator excludes the impact, if any, of dilutive common stock equivalents. Diluted EPS includes the effect, if dilutive, of the Company's outstanding stock options, restricted stock and convertible securities under the treasury stock method. Currently issued and outstanding shares of restricted stock remain subject to vesting requirements. The Company is required to compute EPS amounts under the two class method in periods with earnings. Holders of shares of unvested restricted stock are entitled to the same liquidation and dividend rights as holders of outstanding common stock and are thus considered participating securities. Under applicable accounting guidance, undistributed earnings, if any, for each period are allocated based on the participation rights of both the common stockholders and holders of any participating securities as if earnings for the respective periods had been distributed. Because both the liquidation and dividend rights are identical, undistributed earnings are allocated on a proportionate basis. Stock-Based Compensation The fair value of share-based payments is estimated using the quoted market price of the Company's common stock and pricing models as of the date of grant as further discussed in Note 12, "Long-Term Incentive and Deferred Compensation Plans." The resulting cost, net of estimated forfeitures, is recognized over the period during which an employee is required to provide service in exchange for the awards, usually the vesting period. In addition to service-based awards, the Company issues performance-based awards, which are conditional based upon Company performance and may vest in an amount that will depend on the Company's achievement of specified performance objectives. Guarantees Some product sales in the Offshore/Manufactured Products segment are sold with an assurance warranty, generally ranging from 12 to 18 months. Parts and labor are covered under the terms of the warranty agreement. Warranty provisions are estimated based upon historical experience by product, configuration and geographic region. During the ordinary course of business, the Company also provides standby letters of credit or other guarantee instruments to certain parties as required for certain transactions initiated by either the Company or its subsidiaries. As of December 31, 2020, the maximum potential amount of future payments that the Company could be required to make under these guarantee agreements (letters of credit) was $29.2 million. The Company has not recorded any liability in connection with these guarantee arrangements. The Company does not believe, based on historical experience and information currently available, that it is likely that any material amounts will be required to be paid under these guarantee arrangements. Accounting for Contingencies The Company has contingent liabilities and future claims for which estimates of the amount of the eventual cost to liquidate such liabilities are accrued. These liabilities and claims sometimes involve threatened or actual litigation where damages have been quantified and an assessment of exposure has been made and recorded in an amount estimated to cover the expected loss. Other claims or liabilities have been estimated based on their fair value or management's experience in such matters and, when appropriate, the advice of outside counsel or other outside experts. Upon the ultimate resolution of these uncertainties, future reported financial results will be impacted by the difference between the accruals and actual amounts paid in settlement. Examples of areas with important estimates of future liabilities include duties, income taxes, litigation, insurance claims, warranty claims, contractual claims and obligations and discontinued operations. Recent Accounting Pronouncements From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board (the "FASB"), which are adopted by the Company as of the specified effective date. Unless otherwise discussed, management believes that the impact of recently issued standards, which are not yet effective, will not have a material impact on the Company's consolidated financial statements upon adoption. In August 2020, the FASB issued updated guidance to simplify the accounting for convertible instruments and contracts in an entity's own equity. This new guidance eliminated the requirement that the carrying value of convertible debt instruments, such as the Company's Notes, be allocated between the debt and equity components. As permitted under the standard, the Company adopted the new guidance on January 1, 2021, using the modified retrospective transition method. Adoption of the standard resulted in a $12.2 million increase in the net carrying value of the Notes, a $3.7 million decrease in deferred income taxes and an $8.5 million net decrease in stockholders' equity. The effective interest rate associated with the Notes after adoption decreased from approximately 6% to approximately 2%, which compares to the contractual interest rate of 1.50%.

Asset Impairment and Other Char

Asset Impairment and Other Charges	12 Months Ended
	Dec. 31, 2020
Restructuring and Related Activities [Abstract]
Asset Impairments and Other Charges	Asset Impairments and Other Charges In March of 2020, the spot price of West Texas Intermediate ("WTI") crude oil declined over 50% in response to current and expected material reductions in global demand stemming from the global response to the COVID-19 pandemic, coupled with announcements by Saudi Arabia and Russia of plans to increase crude oil production. Following this unprecedented collapse in crude oil prices, the spot price of Brent and WTI crude oil closed at $15 and $21 per barrel, respectively, on March 31, 2020. Crude oil prices further declined in April of 2020 to record low levels, and while the spot price of Brent and WTI crude oil increased to an average of $44 and $43 per barrel, respectively, in the fourth quarter of 2020, these average prices continue to remain below historical price levels. Demand for most of the Company's products and services depends substantially on the level of capital expenditures invested in the oil and natural gas industry, which reached 15-year lows in 2020. The decline in crude oil prices, coupled with higher crude oil inventory levels in 2020, caused rapid reductions in most of the Company's customers' drilling, completion and production activities and their related spending on products and services, particularly those supporting activities in the U.S. shale play regions. These conditions have and may continue to result in a material adverse impact on certain customers' liquidity and financial position, leading to further spending reductions, delays in the collection of amounts owed and, in certain instances, non-payments of amounts owed. Consistent with most oilfield service industry peers, the Company's stock price declined dramatically during the first quarter of 2020, with its market capitalization falling substantially below the carrying value of stockholders' equity. Following these March 2020 events, the Company immediately implemented significant cost reduction initiatives. The Company also assessed the carrying value of goodwill, long-lived and other assets based on the industry outlook regarding overall demand for and pricing of its products and services, other market considerations and the financial condition of the Company's customers. As a result of these events, actions and assessments during 2020, the Company recorded the following charges (in thousands): Completion Services Drilling Services Downhole Technologies Offshore/ Corporate Pre-tax Total Tax After-tax Total Impairments of: Goodwill (Note 6) $ 127,054 $ — $ 192,502 $ 86,500 $ — $ 406,056 $ 19,600 $ 386,456 Fixed assets (Note 4) 3,647 5,198 1,623 — — 10,468 2,198 8,270 Operating lease assets (Note 8) — — 1,979 — — 1,979 416 1,563 Inventories (Note 4) 8,981 — 5,921 16,249 — 31,151 5,979 25,172 Severance and restructuring charges 4,094 217 2,018 1,355 1,385 9,069 1,904 7,165 During 2019, the Company recorded the following charges (in thousands): Completion Services Drilling Services Downhole Technologies Offshore/ Corporate Pre-tax Total Tax After-tax Total Impairments of: Goodwill (Note 6) $ — $ — $ 165,000 $ — $ — $ 165,000 $ — $ 165,000 Fixed assets (Note 4) — 33,697 — — — 33,697 7,076 26,621 Severance and restructuring charges 1,847 — — 1,655 — 3,502 735 2,767 During 2018, the Company recorded the following charges (in thousands): Completion Services Drilling Services Downhole Technologies Offshore/ Corporate Pre-tax Total Tax After-tax Total Patent defense costs $ — $ — $ 8,365 $ — $ — $ 8,365 $ 1,757 $ 6,608 Transaction-related costs (Note 5) — — 327 — 3,274 3,601 756 2,845 Fair Labor Standards Act claim settlements 3,034 — — — — 3,034 637 2,397 Severance and restructuring charges 151 — — 1,478 — 1,629 342 1,287

Details of Selected Balance She

Details of Selected Balance Sheet Accounts	12 Months Ended
	Dec. 31, 2020
Details of Selected Balance Sheet Accounts [Abstract]
Details of Selected Balance Sheet Accounts	Details of Selected Balance Sheet Accounts Additional information regarding selected balance sheet accounts as of December 31, 2020 and 2019 is presented below (in thousands). 2020 2019 Accounts receivable, net: Trade $ 109,294 $ 178,813 Unbilled revenue 23,173 28,341 Contract assets 35,870 26,034 Other 3,102 9,044 Total accounts receivable 171,439 242,232 Allowance for doubtful accounts (8,304) (8,745) $ 163,135 $ 233,487 2020 2019 Deferred revenue (contract liabilities) $ 43,384 $ 17,761 As of December 31, 2020, accounts receivable, net in the United States and the United Kingdom represented 63% and 21%, respectively, of the total. No other country or single customer accounted for more than 10% of the Company's total accounts receivable as of December 31, 2020. A summary of activity in the allowance for doubtful accounts for the years ended December 31, 2020, 2019 and 2018 is provided in Note 17, "Valuation Allowances." For the majority of contracts with customers, the Company receives payments based upon established contractual terms as products are delivered and services are performed. The Company's larger project-related contracts within the Offshore/Manufactured Products segment often provide for customer payments as milestones are achieved. Contract assets relate to the Company's right to consideration for work completed but not billed as of December 31, 2020 and 2019 on certain project-related contracts within the Offshore/Manufactured Products segment. Contract assets are transferred to unbilled or trade receivables when the right to consideration becomes unconditional. Contract liabilities primarily relate to advance consideration received from customers (i.e. milestone payments) for contracts for project-driven products as well as others which require significant advance investment in materials. Consistent with industry practice, the Company classifies assets and liabilities related to long-term contracts as current, even though some of these amounts may not be realized within one year. All contracts are reported on the consolidated balance sheets in a net asset (contract asset) or liability (deferred revenue) position on a contract-by-contract basis at the end of each reporting period. In the normal course of business, the Company also receives advance consideration from customers on many other short-term, smaller product and service contracts which is deferred and recognized as revenue once the related performance obligation is satisfied. For the year ended December 31, 2020, the $9.8 million net increase in contract assets was primarily attributable to $32.4 million in revenue recognized during the year, which was partially offset by $22.8 million transferred to accounts receivable. Deferred revenue (contract liabilities) increased by $25.6 million in 2020, reflecting $41.6 million in new customer billings which were not recognized as revenue during the year, partially offset by the recognition of $16.0 million of revenue that was deferred at the beginning of the period. For the year ended December 31, 2019, the $4.8 million net increase in contract assets was primarily attributable to $25.0 million in revenue recognized during the year, which was more than offset by $20.0 million transferred to accounts receivable. Deferred revenue (contract liabilities) increased by $3.6 million in 2019, reflecting $12.2 million in new customer billings which were not recognized as revenue during the year, partially offset by the recognition of $8.5 million of revenue that was deferred at the beginning of the period. 2020 2019 Inventories, net: Finished goods and purchased products $ 88,634 $ 107,691 Work in process 27,063 21,963 Raw materials 95,410 110,719 Total inventories 211,107 240,373 Allowance for excess or obsolete inventory (1) (40,731) (19,031) $ 170,376 $ 221,342 ____________________ (1) During 2020, the Company recorded impairment charges totaling $31.2 million to reduce the carrying value of inventories to their estimated net realizable value based on changes in expectations regarding the near-term utility, customer demand and market pricing of certain goods. Estimated 2020 2019 Property, plant and equipment, net: Land $ 34,968 $ 37,507 Buildings and leasehold improvements 1 – 40 267,072 273,384 Machinery and equipment 2 – 28 239,986 246,826 Completion Services equipment 2 – 10 507,755 510,737 Office furniture and equipment 1 – 10 35,767 45,309 Vehicles 3 – 10 81,607 97,264 Construction in progress 7,207 13,281 Total property, plant and equipment 1,174,362 1,224,308 Accumulated depreciation (790,800) (764,584) $ 383,562 $ 459,724 For the years ended December 31, 2020, 2019 and 2018, depreciation expense was $74.0 million, $96.5 million and $97.2 million, respectively. During 2019, the Company made the strategic decision to reduce the scope of its Drilling Services business unit (adjusting from 34 rigs to 9 rigs) due to the ongoing weakness in customer demand for vertical drilling rigs in the U.S. land market, particularly the Permian Basin. As a result of this decision, the carrying value of 25 rigs, which were decommissioned or sold, was reduced to their estimated realizable value, resulting in the recognition of a $25.5 million non-cash impairment charge. The Company also performed a fair value assessment on the remaining drilling rigs and recognized an additional non-cash impairment charge of $8.2 million (a Level 3 fair value measurement). These non-cash 2019 fixed asset impairment charges totaled $33.7 million. During 2020, the Drilling Services reporting unit recognized a non-cash impairment charge of $5.2 million to further reduce the carrying value of the business' fixed assets to their estimated realizable value. Additionally, during 2020, the Completion Services reporting unit recognized non-cash impairment charges of $3.6 million to reduce the carrying value of certain facilities to their estimated realizable value and the Downhole Technologies reporting unit recognized a non-cash impairment charge of $1.6 million to reduce the carrying value of the business' fixed assets to their estimated realizable value. During 2018, the Company and its insurance carriers reached a final settlement on flood insurance claims resulting from Hurricane Harvey in 2017. In connection with this settlement, the Company's Offshore/Manufactured Products segment recognized a gain of $3.8 million following the remediation and repair of buildings and equipment. This gain is reported as other operating income in the accompanying consolidated statement of operations for the year ended December 31, 2018. 2020 2019 Other noncurrent assets: Deferred compensation plan $ 22,801 $ 22,268 Deferred income taxes 1,280 685 Other 5,646 5,748 $ 29,727 $ 28,701 2020 2019 Accrued liabilities: Accrued compensation $ 18,463 $ 27,428 Insurance liabilities 7,694 9,108 Accrued taxes, other than income taxes 7,307 3,424 Accrued interest 2,202 2,387 Accrued commissions 1,416 1,481 Other 7,422 5,012 $ 44,504 $ 48,840

Business Acquisitions

Business Acquisitions	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Business Acquisitions	Business Acquisitions GEODynamics Acquisition On January 12, 2018, the Company acquired GEODynamics for a purchase price consisting of (i) $295.4 million in cash (net of cash acquired), which was funded through borrowings under the Company's Revolving Credit Facility (as defined in Note 7, "Long-term Debt,"), (ii) approximately 8.66 million shares of the Company's common stock (having a market value of $294.9 million as of the closing date of the GEODynamics Acquisition) and (iii) an unsecured $25 million promissory note that bears interest at 2.5% per annum. Under the terms of agreements with the seller in the GEODynamics Acquisition (the "Seller"), the Company believes it is entitled to indemnification in respect of certain matters occurring prior to the GEODynamics Acquisition and payments due under the promissory note are subject to set-off, in part or in full, in respect of such indemnified matters. As a result of certain indemnity claims pending against the Seller, the Company has reduced the carrying amount of such note in the consolidated balance sheet to $17.1 million as of December 31, 2020, which is its current best estimate of what is owed after set-off for indemnification matters. See Note 14, "Commitments and Contingencies." GEODynamics' results of operations (reported as the Downhole Technologies segment) have been included in the Company's consolidated financial statements subsequent to the closing of the GEODynamics Acquisition on January 12, 2018. Falcon Acquisition On February 28, 2018, the Company acquired Falcon, a full-service provider of flowback and well testing services for the separation and recovery of fluids, solid debris and proppant used during hydraulic fracturing operations. The purchase price was $84.2 million (net of cash acquired). Under the terms of the purchase agreement, the Company is entitled to indemnification in respect of certain matters occurring prior to the acquisition. Falcon's results of operations have been included in the Company's consolidated financial statements and have been reported within the Completion Services business subsequent to the closing of the acquisition on February 28, 2018. During the year ended December 31, 2018, the Company expensed $3.6 million in transaction-related costs incurred in connection with the acquisitions of GEODynamics and Falcon, which are included within selling, general and administrative expense and within other operating income, net.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill Changes in the carrying amount of goodwill for the years ended December 31, 2020 and 2019 are as follows (in thousands): Well Site Services Downhole Technologies Offshore / Manufactured Total Completion Drilling Subtotal Balance as of December 31, 2018 Goodwill $ 221,582 $ 22,767 $ 244,349 $ 357,502 $ 162,462 $ 764,313 Accumulated impairment losses (94,528) (22,767) (117,295) — — (117,295) 127,054 — 127,054 357,502 162,462 647,018 Goodwill impairment (December 2019) — — — (165,000) — (165,000) Foreign currency translation — — — — 288 288 Balance as of December 31, 2019 $ 127,054 $ — $ 127,054 $ 192,502 $ 162,750 $ 482,306 Balance as of December 31, 2019 Goodwill $ 221,582 $ 22,767 $ 244,349 $ 357,502 $ 162,750 $ 764,601 Accumulated impairment losses (94,528) (22,767) (117,295) (165,000) — (282,295) 127,054 — 127,054 192,502 162,750 482,306 Goodwill impairments (March 2020) (127,054) — (127,054) (192,502) (86,500) (406,056) Foreign currency translation — — — — 239 239 Balance as of December 31, 2020 $ — $ — $ — $ — $ 76,489 $ 76,489 Balance as of December 31, 2020 Goodwill $ 221,582 $ 22,767 $ 244,349 $ 357,502 $ 162,989 $ 764,840 Accumulated impairment losses (221,582) (22,767) (244,349) (357,502) (86,500) (688,351) $ — $ — $ — $ — $ 76,489 $ 76,489 As further discussed in Note 2, "Significant Accounting Policies," goodwill is allocated to each reporting unit based on acquisitions made by the Company and is assessed for impairment annually and when an event occurs or circumstances change that indicate the carrying amounts may not be recoverable. December 2019 Impairment The Company had three reporting units – Completion Services, Downhole Technologies and Offshore/Manufactured Products – whose goodwill balances totaled approximately $647 million as of September 30, 2019. During the fourth quarter of 2019, U.S. land-based completion activity declined significantly from levels experienced over the previous three quarters. Additionally, a number of other market indicators declined to levels not experienced in recent years. Consistent with most other oilfield service industry peers, the Company's stock price declined and its market capitalization was below the carrying value of stockholders' equity. Given these market conditions, the Company reduced its near-term demand outlook for its short-cycle products and services in the U.S. shale play regions. This refined outlook was incorporated in the December 1, 2019 annual impairment assessment. Management utilizes, depending on circumstances, a combination of valuation methodologies including a market approach and an income approach, as well as guideline public company comparables. The valuation techniques used in the December 1, 2019 assessment were consistent with those used during previous testing, except for the Downhole Technologies reporting unit where the income approach was used to estimate its fair value – with the market approach used only to validate the results in 2019. The fair value of the Company's reporting units were determined using significant unobservable inputs (a Level 3 fair value measurement). The income approach estimates the fair value of each reporting unit by discounting the Company's current forecast of future cash flows by its estimate of the discount rate (or expected return) that a market participant would require. The market approach includes the use of comparative multiples to corroborate the discounted cash flow results. The market approach involves judgment in the selection of the appropriate peer group companies and valuation multiples. Significant assumptions used in the income approach include, among others, the estimated future net annual cash flows and discount rates for each reporting unit. Management selected estimates used in the discounted cash flow projections using historical data as well as then-current and anticipated market conditions and estimated growth rates. These estimates were based upon assumptions that considered published industry trends and market forecasts of commodity prices, rig count, well count and offshore/onshore drilling and completion spending, and were believed to be reasonable at the time. Based on this quantitative assessment, the Company concluded that the goodwill amount recorded in its Downhole Technologies reporting unit was partially impaired and recognized a non-cash goodwill impairment charge of $165.0 million in the fourth quarter of 2019. The discount rates used to value the Company's reporting units as of December 1, 2019 ranged between 12.5% and 13.0%. Holding all other assumptions and inputs used in each of the respective discounted cash flow analysis constant, a 50 basis point increase in the discount rate assumption would have increased the goodwill impairment charge by approximately $28 million. March 2020 Impairments Given the significance of the March 2020 events described in Note 3, "Asset Impairments and Other Charges," the Company performed a quantitative assessment of goodwill for further impairment as of March 31, 2020. This interim assessment indicated that the fair value of each of the reporting units was less than their respective carrying amounts due to, among other factors, the significant decline in the Company's stock price and that of its peers and reduced growth rate expectations given weak energy market conditions resulting from the demand destruction caused by the global response to the COVID-19 pandemic. In addition, the estimated returns required by market participants increased materially in the Company's March 31, 2020 assessment from the assessment performed as of December 1, 2019, resulting in higher discount rates used in the discounted cash flow analysis. The valuation techniques used in the March 31, 2020 assessment were consistent with those used during the December 1, 2019 assessment, except for the Completion Services reporting unit where the income approach was used to estimate its fair value – with the market approach used only to validate the results in 2020. The fair value of the Company's reporting units were determined using significant unobservable inputs (a Level 3 fair value measurement). Significant assumptions and estimates used in the income approach include, among others, estimated future net annual cash flows and discount rates for each reporting unit, current and anticipated market conditions, estimated growth rates and historical data. These estimates relied upon significant management judgment, particularly given the uncertainties regarding the COVID-19 pandemic and its impact on activity levels and commodity prices as well as future global economic growth. Based on this quantitative assessment as of March 31, 2020, the Company concluded that goodwill recorded in the Completion Services and Downhole Technologies businesses was fully impaired while goodwill recorded in the Offshore/Manufactured Products business was partially impaired. The Company therefore recognized non-cash goodwill impairment charges totaling $406.1 million in the first quarter of 2020, as presented in further detail in the table above. The discount rates used to value the Company's reporting units as of March 31, 2020 ranged between 16.8% and 18.5%. Holding all other assumptions and inputs used in the discounted cash flow analysis constant, a 50 basis point increase in the discount rate assumption for the Offshore/Manufactured Products reporting unit would have increased the goodwill impairment charge by approximately $10 million. December 2020 Assessment As of December 1, 2020, the Company had only one reporting unit – Offshore/Manufactured Products – with a goodwill balance of $76 million. The Company performed its annual quantitative assessment of goodwill for impairment, which indicated that the fair value of the Offshore/Manufactured Products reporting unit was greater than its carrying amount and no additional provision for impairment was required. The fair value of the Offshore/Manufactured Products reporting unit was determined using significant unobservable inputs (a Level 3 fair value measurement). The valuation techniques used in the December 1, 2020 assessment were consistent with those used during the March 31, 2020 assessment. The discount rate used to value the Offshore/Manufactured Products reporting unit as of December 1, 2020 was approximately 15%. The estimated returns required by market participants decreased in the Company's December 1, 2020 assessment from the assessment as of March 31, 2020, resulting in lower discount rate used in the discounted cash flow analysis. Holding all other assumptions and inputs used in the discounted cash flow analysis constant, a 100 basis point increase in the discount rate assumption for the Offshore/Manufactured Products reporting unit would not result in a goodwill impairment. The March 2020 and December 2019 impairment charges did not impact the Company's liquidity position, debt covenants or cash flows. Other Intangible Assets The following table presents the gross carrying amount and the related accumulated amortization for major intangible asset classes as of December 31, 2020 and 2019 (in thousands): 2020 2019 Other Intangible Assets Gross Accumulated Net Carrying Amount Gross Accumulated Net Carrying Amount Customer relationships $ 168,288 $ 55,380 $ 112,908 $ 168,278 $ 44,296 $ 123,982 Patents/Technology/Know-how 75,920 26,124 49,796 85,919 30,791 55,128 Noncompete agreements 16,044 14,742 1,302 17,125 11,061 6,064 Tradenames and other 53,708 11,965 41,743 53,708 8,791 44,917 Total other intangible assets $ 313,960 $ 108,211 $ 205,749 $ 325,030 $ 94,939 $ 230,091 Amortization expense was $24.9 million, $26.8 million and $26.3 million in the years ended December 31, 2020, 2019 and 2018, respectively. The weighted average remaining amortization period for all intangible assets, other than goodwill, was 12.4 years as of December 31, 2020 and 12.9 years as of December 31, 2019. Amortization expense is expected to total $20.6 million in 2021, $19.8 million in 2022, $16.8 million in 2023, $16.7 million in 2024 and $16.6 million in 2025. As of December 31, 2020 and 2019, no provisions for impairment of other intangible assets were required.

Long-term Debt

Long-term Debt	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Long-term Debt	Long-term Debt As of December 31, 2020 and 2019, long-term debt consisted of the following (in thousands): 2020 2019 Revolving credit facility (1) $ 18,408 $ 50,534 1.50% convertible senior notes due February 2023 (2) 143,242 167,594 Promissory note 17,095 25,000 Other debt and finance lease obligations 4,792 5,041 Total debt 183,537 248,169 Less: Current portion (17,778) (25,617) Total long-term debt $ 165,759 $ 222,552 ____________________ (1) Presented net of $0.6 million and $1.4 million of unamortized debt issuance costs as of December 31, 2020 and 2019, respectively. (2) The outstanding principal amount of the 1.50% convertible senior notes was $157.4 million and $192.3 million as of December 31, 2020 and 2019, respectively. Scheduled maturities of total debt as of December 31, 2020, are as follows (in thousands): 2021 $ 17,778 2022 19,126 2023 143,744 2024 485 2025 512 Thereafter 1,892 $ 183,537 Asset-based Revolving Credit Facility On February 10, 2021, the Company entered into a senior secured credit facility with certain lenders, which provides for a $125.0 million asset-based revolving credit facility (the "Asset-based Revolving Credit Facility") under which credit availability is subject to a borrowing base calculation. Concurrent with entering into this facility, the Amended Credit Agreement (further discussed below) was terminated. The Asset-based Revolving Credit Facility is governed by a credit agreement with Wells Fargo Bank, National Association, as administrative agent and the lenders and other financial institutions from time to time party thereto (the "Asset-based Credit Agreement"). The Asset-based Credit Agreement matures on February 10, 2025 with a springing maturity 91 days prior to the maturity of any outstanding indebtedness with a principal amount in excess of $17.5 million (excluding the unsecured promissory note to the Seller). The Asset-based Credit Agreement provides funding based on a borrowing base calculation that includes eligible U.S. customer accounts receivable and inventory and provides for a $50.0 million sub-limit for the issuance of letters of credit. Borrowings under the Asset-based Credit Agreement are secured by a pledge of substantially all of the Company's domestic assets and the stock of certain foreign subsidiaries. Borrowings under the Asset-based Credit Agreement bear interest at a rate equal to the London Interbank Offered Rate ("LIBOR") plus a margin of 2.75% to 3.25% and subject to a LIBOR floor rate of 0.50%, or at a base rate plus a margin of 1.75% to 2.25%, in each case based on average borrowing availability. The Company must also quarterly pay a commitment fee of 0.375% to 0.50% per annum, based on unused commitments under the Asset-based Credit Agreement. The Asset-based Credit Agreement places restrictions on the Company's ability to incur additional indebtedness, grant liens on assets, pay dividends or make distributions on equity interests, dispose of assets, make investments, repay other indebtedness (including the Notes), engage in mergers, and other matters, in each case, subject to certain exceptions. The Asset-based Credit Agreement contains customary default provisions, which, if triggered, could result in acceleration of all amounts then outstanding. The Asset-based Credit Agreement also requires the Company to satisfy and maintain a fixed charge coverage ratio of not less than 1.0 to 1.0 for specified periods of time in the event that availability under the Asset-based Credit Agreement is less than the greater of 15% of the borrowing base and $14.1 million or if an event of default has occurred and is continuing. Revolving Credit Facility Until its termination on February 10, 2021, the Company's former senior secured revolving credit facility, (the "Revolving Credit Facility") was governed by an amended and restated credit agreement with Wells Fargo Bank, N.A., as administrative agent for the lenders party thereto and collateral agent for the secured parties thereunder, and the lenders and other financial institutions from time to time party thereto, dated as of January 30, 2018, as amended and restated (the "Credit Agreement"), which was scheduled to mature on January 30, 2022. The Credit Agreement governed the Company's Revolving Credit Facility. Prior to June 17, 2020, the Revolving Credit Facility provided for $350 million in lender commitments including $50 million available for the issuance of letters of credit. On June 17, 2020, the Company entered into an omnibus amendment to the Credit Agreement (as amended, the "Amended Credit Agreement"). Lender commitments under the Amended Credit Agreement were reduced to $200.0 million in exchange for the suspension of the financial covenants described below from July 1, 2020 through March 30, 2021. During the financial covenant suspension period, borrowing availability under the Revolving Credit Facility (as amended, the "Amended Revolving Credit Facility") was limited to 85% of the lesser of (i) $200.0 million or (ii) a borrowing base, calculated monthly, equal to the sum of 70% of the consolidated net book value of eligible receivables and 20% of the consolidated net book value of eligible inventory (the "Borrowing Base"). As of December 31, 2020, the Company had $19.0 million of borrowings outstanding under the Credit Agreement and $29.2 million of outstanding letters of credit. The total amount available to be drawn as of January 1, 2021 was $69.3 million, calculated based on 85% of the Borrowing Base less outstanding borrowings and letters of credit. Prior to June 17, 2020, amounts outstanding under the Revolving Credit Facility accrued interest at LIBOR plus a margin of 1.75% to 3.00%, or at a base rate plus a margin of 0.75% to 2.00%, in each case based on a ratio of the Company's total net funded debt to consolidated EBITDA (as defined in the Credit Agreement). The Company was also required to pay a quarterly commitment fee of 0.25% to 0.50%, based on the Company's ratio of total net funded debt to consolidated EBITDA, on the unused commitments under the Credit Agreement. Effective June 17, 2020, borrowings outstanding under the Amended Revolving Credit Facility accrued interest at LIBOR plus a margin of 2.50% to 3.75%, or at a base rate plus a margin of 1.50% to 2.75%, in each case based on a ratio of the Company's total net funded debt to consolidated EBITDA. The Company also paid a quarterly commitment fee of 0.50%, based on unused commitments under the Amended Credit Agreement. The Company expensed $0.5 million of previously deferred financing costs in 2020, which is included in interest expense, net, as a result of the amendment of the Credit Agreement. As of December 31, 2020, the Company was in compliance with its debt covenants under the Amended Credit Agreement. 1.50% Convertible Senior Notes due February 2023 On January 30, 2018, the Company issued $200 million aggregate principal amount of the Notes pursuant to an indenture, dated as of January 30, 2018 (the "Indenture"), between the Company and Wells Fargo Bank, National Association, as trustee. Net proceeds from the Notes, after deducting issuance costs, were approximately $194 million, which was used by the Company to repay a portion of the outstanding borrowings under the Revolving Credit Facility during the first quarter of 2018. During 2020, the Company purchased $34.9 million principal amount of the outstanding Notes for $20.1 million in cash. The net carrying amount of the liability component of these Notes totaled $30.8 million. In connection with extinguishment of these Notes, the Company recognized non-cash gains totaling $10.7 million during 2020, which is included within other income, net. During 2019, the Company repurchased $7.8 million principal amount of the outstanding Notes for $6.7 million in cash, which approximated the net carrying amount of the related liability. The initial carrying amount of the Notes recorded in the Company's consolidated balance sheet was less than the $200 million in principal amount of the Notes, in accordance with then-applicable accounting principles, reflective of the estimated fair value of a similar debt instrument that does not have a conversion feature. The Company recorded the value of the conversion feature as a debt discount, to be amortized as interest expense over the term of the Notes, with a similar amount allocated to additional paid-in capital. As a result of this amortization, the interest expense the Company recognized related to the Notes for accounting purposes was based on an effective interest rate of approximately 6%, which is greater than the cash interest payments the Company is obligated to pay on the Notes. Interest expense associated with the Notes for the years ended December 31, 2020, 2019 and 2018 was $9.3 million, $10.2 million and $9.0 million, respectively, while the related contractual cash interest expense totaled $2.6 million, $3.0 million and $2.8 million, respectively. The following table presents the carrying amounts of the Notes in the Company's consolidated balance sheets (in thousands): December 31, 2020 2019 Principal amount of the liability component $ 157,369 $ 192,250 Less: Unamortized discount 12,308 21,544 Less: Unamortized issuance costs 1,819 3,112 Net carrying amount of the liability component $ 143,242 $ 167,594 Net carrying amount of the equity component $ 25,683 $ 25,683 See Note 2, "Summary of Significant Accounting Policies," for discussion of the recent revision to accounting guidance for convertible instruments, which changed the Company's method of accounting for the Notes upon its adoption of the standard effective January 1, 2021. The Notes bear interest at a rate of 1.50% per year until maturity. Interest is payable semi-annually in arrears on February 15 and August 15 of each year. In addition, additional interest and special interest may accrue on the Notes under certain circumstances as described in the Indenture. The Notes will mature on February 15, 2023, unless earlier repurchased, redeemed or converted. The initial conversion rate is 22.2748 shares of the Company's common stock per $1,000 principal amount of Notes (equivalent to an initial conversion price of approximately $44.89 per share of common stock). The conversion rate, and thus the conversion price, may be adjusted under certain circumstances as described in the Indenture. The Company's intent is to repay the principal amount of the Notes in cash and settle the conversion feature in shares of the Company's common stock. Noteholders may convert their Notes, at their option only in the following circumstances: (1) if the last reported sale price per share of the Company's common stock exceeds 130% of the conversion price for each of at least 20 trading days during the 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter; (2) during the five consecutive business days immediately after any five consecutive trading day period (such five consecutive trading day period, the "measurement period") in which the trading price per $1,000 principal amount of the Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price per share of the Company's common stock on such trading day and the conversion rate on such trading day; (3) upon the occurrence of certain corporate events or distributions on the Company's common stock, as described in the Indenture; or (4) if the Company calls the Notes for redemption, or at any time from, and including, November 15, 2022 until the close of business on the second scheduled trading day immediately before the maturity date. The Company will settle conversions by paying or delivering, as applicable, cash, shares of common stock or a combination of cash and shares of common stock, at the Company's election, based on the applicable conversion rate(s). If the Company elects to deliver cash or a combination of cash and shares of common stock, then the consideration due upon conversion will be based on a defined observation period. The Notes will be redeemable, in whole or in part, at the Company's option at any time, and from time to time, on or after February 15, 2021, at a cash redemption price equal to the principal amount of the Notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date, but only if the last reported sale price per share of common stock exceeds 130% of the conversion price on each of at least 20 trading days during the 30 consecutive trading days ending on, and including, the trading day immediately before the date the Company sends the related redemption notice. If specified change in control events involving the Company as defined in the Indenture occur, then noteholders may require the Company to repurchase their Notes at a cash repurchase price equal to the principal amount of the Notes to be repurchased, plus accrued and unpaid interest. Additionally, the Indenture contains certain events of default, including certain defaults by the Company with respect to other indebtedness of at least $40.0 million. As of December 31, 2020, none of the conditions allowing holders of the Notes to convert, or requiring the Company to repurchase the Notes, had been met. Promissory Note In connection with the GEODynamics Acquisition, the Company issued a $25.0 million promissory note that bears interest at 2.50% per annum and was scheduled to mature on July 12, 2019. The Company believes that payments due under the promissory note are subject to set-off, in full or in part, against certain claims related to matters occurring prior to the GEODynamics Acquisition. The Company has provided notice to and asserted indemnification claims against the Seller, and the Seller has filed a breach of contract suit against the Company and one of its wholly-owned subsidiaries alleging that payments due under the promissory note are required to be, but have not been, repaid in accordance with the terms of the note. The Company has incurred settlement costs and expenses of $7.9 million related to such indemnification claims, and believes that the maturity date of the note is extended until the resolution of these claims and expects that the amount ultimately paid in respect of such note will be reduced as a result of the indemnification claims. Accordingly, the Company has reduced the carrying amount of such note in the consolidated balance sheet to $17.1 million as of December 31, 2020, which is its current best estimate of what is owed after set-off for indemnification matters. See Note 14, "Commitments and Contingencies."

Operating Leases

Operating Leases	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Operating Leases	Operating Leases Operating Lease Assets The following table presents the carry value of operating lease assets in the Company's consolidated sheets (in thousands): 2020 2019 Operating lease assets, net $ 33,140 $ 43,616 Operating lease asset additions are offset by a corresponding increase to operating lease liabilities and do not impact the consolidated statement of cash flows at commencement. The non-cash effect of operating lease additions in 2020 and 2019 totaled $1.9 million and $53.7 million (inclusive of $47.7 million recognized in 2019 upon adoption of the revised lease accounting guidance), respectively. Operating lease expense was $16.6 million, $17.9 million and $14.9 million for the years ended December 31, 2020, 2019 and 2018, respectively. The following table provides details regarding the components of operating lease expense based on the initial term of underlying agreements for the years ended December 31, 2020 and 2019 (in thousands): 2020 2019 Operating lease expense components: Leases with initial term of greater than 12 months $ 12,564 $ 11,972 Leases with initial term of 12 months or less 4,024 5,906 Total operating lease expense $ 16,588 $ 17,878 During 2020, the Downhole Technologies segment made decisions to close certain lease facilities in connection with restructuring activities and recognized a non-cash impairment charge of $2.0 million to reduce the carrying value of the related operating lease assets to their estimated realizable value. Operating Lease Liabilities The following table provides the scheduled maturities of operating lease liabilities as of December 31, 2020 (in thousands): 2021 $ 9,293 2022 6,534 2023 5,204 2024 4,562 2025 4,461 Thereafter 13,787 Total lease payments 43,841 Less: Imputed interest (7,055) Present value of operating lease liabilities 36,786 Less: Current portion (7,620) Total long-term operating lease liabilities $ 29,166 Weighted-average remaining lease term (years) 6.8 Weighted-average discount rate 5.0 %

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Consolidated loss before income taxes for the years ended December 31, 2020, 2019 and 2018 consisted of the following (in thousands): 2020 2019 2018 United States $ (534,452) $ (254,291) $ (29,424) Foreign 123 13,564 7,692 Total $ (534,329) $ (240,727) $ (21,732) The 2020 and 2019 U.S. losses before income taxes included non-cash goodwill impairment charges of $406.1 million and $165.0 million, respectively, and non-cash fixed asset and lease impairment charges of $12.4 million and $33.7 million, respectively. Regarding the goodwill impairment charges recognized in 2020 and 2019, approximately $313.1 million and $165.0 million, respectively, were not deductible for income tax purposes. Components of income tax benefit for the years ended December 31, 2020, 2019 and 2018 consisted of the following (in thousands): 2020 2019 2018 Current: United States $ (44,399) $ 300 $ (5,549) U.S. state 235 292 1,534 Foreign 2,622 5,958 4,877 (41,542) 6,550 862 Deferred: United States (20,913) (13,972) (2,592) U.S. state (1,798) (473) (95) Foreign (1,693) (1,024) (802) (24,404) (15,469) (3,489) Total income tax benefit $ (65,946) $ (8,919) $ (2,627) A reconciliation of the U.S. statutory tax benefit rate to the effective tax benefit rate for the years ended December 31, 2020, 2019 and 2018 is as follows: 2020 2019 2018 U.S. statutory tax benefit rate (21.0) % (21.0) % (21.0) % Impairments of goodwill 12.3 14.4 — Effect of CARES Act (3.1) — — Effect of Tax Reform Legislation — — (26.1) Valuation allowance against tax assets 0.3 0.8 14.0 Non-deductible compensation 0.1 0.3 5.7 Other non-deductible expenses 0.1 0.2 12.6 Effect of foreign income taxed at different rates 0.1 0.7 0.5 State income taxes, net of federal benefits (1.1) (0.4) (0.3) Other, net — 1.3 2.5 Effective tax benefit rate (12.3) % (3.7) % (12.1) % The significant items giving rise to the deferred tax assets and liabilities as of December 31, 2020 and 2019 are as follows (in thousands): 2020 2019 Deferred tax assets: Foreign tax credit carryforwards $ 20,870 $ 20,360 Net operating loss carryforwards 37,838 54,772 Employee benefits 7,353 10,778 Inventory 9,696 7,725 Operating lease liabilities 6,697 8,171 Other 7,649 4,562 Gross deferred tax asset 90,103 106,368 Valuation allowance (35,497) (35,828) Net deferred tax asset 54,606 70,540 Deferred tax liabilities: Tax over book depreciation (27,613) (36,387) Intangible assets (30,392) (56,867) Convertible senior notes discount (2,790) (4,964) Operating lease assets (5,884) (8,047) Other (910) (1,669) Deferred tax liability (67,589) (107,934) Net deferred tax liability $ (12,983) $ (37,394) 2020 2019 Balance sheet classification: Other non-current assets $ 1,280 $ 685 Deferred tax liability (14,263) (38,079) Net deferred tax liability $ (12,983) $ (37,394) On March 27, 2020, the CARES Act was signed into law. In accordance with the rules and provisions under the CARES Act, the Company has filed carryback claims regarding U.S. net operating losses generated in 2018 and 2019. Prior to the enactment of the CARES Act, such tax losses could only be carried forward. The Company recognized a discrete tax benefit of $16.4 million and received cash of $41.3 million related to these CARES Act carryback claims in 2020. On December 22, 2017, the United States enacted Tax Reform Legislation which resulted in significant changes to U.S. tax and related laws, including certain key U.S. federal income tax provisions applicable to multinational companies such as the Company. These changes included, among others, the implementation of a territorial tax system with a one-time mandatory tax on undistributed foreign earnings of subsidiaries and a reduction in the U.S. corporate income tax rate to 21% from 35% beginning in 2018. During 2018, the Company adjusted its December 2017 provisional estimates with respect to Tax Reform Legislation resulting in an income tax benefit of $5.8 million. The Company had $74.6 million of U.S. federal NOL carryforwards as of December 31, 2020, which can be carried forward indefinitely. Approximately $37.6 million of the U.S. federal NOL carryforwards are attributable to the acquired GEODynamics operations and are subject to certain limitation provisions. The Company's U.S. state NOL carryforwards as of December 31, 2020 totaled $171.8 million, of which $13.9 million are attributable to the acquired GEODynamics operations and are subject to certain limitation provisions. As of December 31, 2020, the Company had NOL carryforwards related to certain of its international operations totaling $35.0 million, of which $14.1 million can be carried forward indefinitely. As of December 31, 2020 and 2019, the Company had recorded valuation allowances of $18.4 million and $15.5 million, respectively, with respect to foreign and U.S. state NOL carryforwards. As of December 31, 2020, the Company's foreign tax credit carryforwards totaled $20.9 million. These foreign tax credits will expire in varying amounts from 2022 to 2029. As of December 31, 2020 and 2019, the Company had recorded valuation allowances of $17.1 million and $20.4 million, respectively, with respect to foreign tax credit carryforwards. The Company files tax returns in the jurisdictions in which they are required. These returns are subject to examination or audit and possible adjustment as a result of assessments by taxing authorities. The Company believes that it has recorded sufficient tax liabilities and does not expect that the resolution of any examination or audit of its tax returns will have a material adverse effect on its consolidated operating results, financial condition or liquidity. Tax years subsequent to 2013 remain open to U.S. federal tax audit. Foreign subsidiary federal tax returns subsequent to 2012 are subject to audit by various foreign tax authorities. Uncertain tax positions are accounted for using a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more-likely-than-not to be sustained upon examination by taxing authorities. The amount recognized is measured as the largest amount of benefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. The total amount of unrecognized tax benefits as of December 31, 2020 and 2019 was nil. The Company accrues interest and penalties related to unrecognized tax benefits as a component of the Company's provision for income taxes. As of December 31, 2020 and 2019, the Company had no accrued interest expense or penalties.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Stockholders' Equity	Stockholders' Equity Common and Preferred Stock The following table provides details with respect to changes in the number of shares of common stock, $0.01 par value, issued, held in treasury and outstanding during 2020 and 2019 (in thousands). Issued Treasury Stock Outstanding Shares of common stock - December 31, 2018 71,754 11,784 59,970 Restricted stock awards, net of forfeitures 792 — 792 Shares withheld for taxes on vesting of restricted stock awards — 210 (210) Purchase of treasury stock — 51 (51) Shares of common stock - December 31, 2019 72,546 12,045 60,501 Restricted stock awards, net of forfeitures 743 — 743 Shares withheld for taxes on vesting of restricted stock awards — 239 (239) Shares of common stock - December 31, 2020 73,289 12,284 61,005 As of December 31, 2020 and 2019, the Company had 25 million shares of preferred stock, $0.01 par value, authorized, with no shares issued or outstanding. The Company maintained a share repurchase program, which was allowed to expire on July 29, 2020. During 2020, there were no repurchases of common stock under the program. During 2019, the Company repurchased 51 thousand shares of common stock at a total cost of $0.8 million. Accumulated Other Comprehensive Loss Accumulated other comprehensive loss increased from $67.7 million at December 31, 2019 to $71.4 million at December 31, 2020, due primarily to changes in currency exchange rates. Accumulated other comprehensive loss is primarily related to fluctuations in currency exchange rates against the U.S. dollar as used to translate certain international operations. For 2020 and 2019, currency translation adjustments recognized as a component of other comprehensive loss were primarily attributable to the United Kingdom and Brazil. During the year ended December 31, 2020, the exchange rate of the British pound strengthened by 3% compared to the U.S. dollar while the Brazilian real weakened by 23% compared to the U.S. dollar, contributing to other comprehensive loss of $3.6 million. During the year ended December 31, 2019, the exchange rate of the British pound strengthened by 4% compared to the U.S. dollar while the Brazilian real weakened by 4% compared to the U.S. dollar during the same period, contributing to other comprehensive loss of $3.7 million.

Net Loss Per Share

Net Loss Per Share	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per Share The table below provides a reconciliation of the numerators and denominators of basic and diluted net loss per share for the years ended December 31, 2020, 2019 and 2018 (in thousands, except per share amounts): 2020 2019 2018 Numerators: Net loss $ (468,383) $ (231,808) $ (19,105) Less: Income attributable to unvested restricted stock awards — — — Numerator for basic net loss per share (468,383) (231,808) (19,105) Effect of dilutive securities: Unvested restricted stock awards — — — Numerator for diluted net loss per share $ (468,383) $ (231,808) $ (19,105) Denominators: Weighted average number of common shares outstanding 60,953 60,424 59,680 Less: Weighted average number of unvested restricted stock awards outstanding (1,141) (1,045) (968) Denominator for basic and diluted net loss per share 59,812 59,379 58,712 Net loss per share: Basic $ (7.83) $ (3.90) $ (0.33) Diluted (7.83) (3.90) (0.33) The calculation of diluted net loss per share for the years ended December 31, 2020, 2019 and 2018 excluded 582 thousand shares, 659 thousand shares and 696 thousand shares, respectively, issuable pursuant to outstanding stock options and restricted stock awards, due to their antidilutive effect. Additionally, shares issuable upon conversion of the 1.50% convertible senior notes were excluded for the years ended December 31, 2020, 2019 and 2018, due to their antidilutive effect.

Long-Term Incentive and Deferre

Long-Term Incentive and Deferred Compensation Plans	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Long-Term Incentive and Deferred Compensation Plans	Long-Term Incentive and Deferred Compensation Plans The Company measures the cost of employee services received in exchange for an award of equity instruments based on the grant-date fair value of the award. The fair value of service-based restricted stock awards is determined by the quoted market price of the Company's common stock on the date of grant. The fair value of performance-based restricted awards in 2017 was estimated using a Monte Carlo simulation model due to the inclusion of performance metrics that are not based solely on the performance of the Company's common stock. The resulting cost, net of estimated forfeitures, is recognized over the period during which an employee is required to provide service in exchange for the awards, usually the vesting period. Stock-based compensation pre-tax expense recognized in the years ended December 31, 2020, 2019 and 2018 totaled $8.4 million, $16.8 million and $22.6 million, respectively. Restricted Stock Awards The restricted stock program consists of a combination of service-based restricted stock and performance-based restricted stock. The number of performance-based restricted shares ultimately issued under the program is dependent upon achievement of predefined specific performance objectives generally measured over a three-year period. The performance objectives for performance-based stock units granted during 2020, 2019 and 2018 are based on the Company's EBITDA growth rate over a three-year period. In the event the predefined targets are exceeded for any performance-based award, additional shares up to a maximum of 200% of the target award may be granted. Conversely, if actual performance falls below the predefined target, the number of shares vested is reduced. If the actual performance falls below the threshold performance level, no restricted shares will vest. Service-based restricted stock awards generally vest on a straight-line basis over their term, which is generally three The following table presents changes in restricted stock awards and related information for the year ended December 31, 2020 (shares in thousands): Service-based Restricted Stock Performance-based Restricted Stock Number of Shares Weighted Average Grant Date Fair Value Number of Shares Weighted Average Grant Date Fair Value Total Number of Restricted Shares Unvested, December 31, 2019 1,064 $ 22.84 248 1,312 Granted 687 10.01 180 $ 11.15 867 Performance adjustment (1) — — 23 23 Vested (595) 24.44 (125) 62.66 (720) Forfeited (69) 19.42 (17) 11.15 (85) Unvested, December 31, 2020 1,087 14.07 310 1,397 ____________________ (1) Reflects an adjustment to the number of shares to be issued upon vesting of the 2018 performance-based awards. The total fair value of restricted stock awards that vested in 2020, 2019 and 2018 was $14.5 million, $18.2 million and $19.4 million, respectively. As of December 31, 2020, there was $8.6 million of total compensation costs related to unvested restricted stock awards not yet recognized, which is expected to be recognized over a weighted average vesting period of 1.5 years. As of December 31, 2020, approximately 1.0 million shares were available for future grant under the Oil States International, Inc. 2018 Equity Participation Plan. Stock Options The Company has not awarded stock options since 2015. The fair value of historical option grants were estimated on the date of grant using a Black Scholes Merton option pricing model. No options were exercised in 2020, 2019 or 2018. The following table presents the changes in stock options outstanding (all exercisable) and related information for the year ended December 31, 2020 (shares in thousands): Options Weighted Average Exercise Price (1) Weighted Average Contractual Life (years) Aggregate Intrinsic Value (thousands) Outstanding Options, December 31, 2019 636 $ 48.81 3.0 $ — Forfeited/Expired (105) 49.52 Outstanding Options, December 31, 2020 530 48.67 2.3 — ____________________ (1) Exercise prices ranged from $41.60 to $58.54 as of December 31, 2020. Long-Term Cash Incentive Awards During 2020 and 2019, the Company issued conditional long-term cash incentive awards ("Cash Awards") of approximately $2.0 million and $1.4 million, respectively, with the ultimate dollar amount to be awarded ranging from zero to a maximum of $4.0 million for the 2020 Cash Award and from zero to a maximum of $2.7 million for the 2019 Cash Award. The performance measure for these Cash Awards is relative total stockholder return compared to a peer group of companies measured over a three-year period. The ultimate dollar amount to be awarded for the 2020 and 2019 Cash Awards is limited to their targeted award value ($2.0 million and $1.4 million, respectively) if the Company's total stockholder return is negative over the performance period. The obligation related to the Cash Awards is classified as a liability and recognized over the vesting period. Deferred Compensation Plan The Company maintains a nonqualified deferred compensation plan (the "Deferred Compensation Plan") that permits eligible employees and directors to elect to defer the receipt of all or a portion of their directors' fees and/or salary and annual bonuses. Employee contributions to the Deferred Compensation Plan are matched by the Company at the same percentage as if the employee was a participant in the Company's 401(k) Retirement Plan and was not subject to the IRS limitations on match-eligible compensation. In the second quarter of 2020, the Company suspended matching contributions to the Deferred Compensation Plan in response to the significant decline in activity levels due to the COVID-19 pandemic. The Deferred Compensation Plan also permits the Company to make discretionary contributions to any employee's account, although none have been made to date. Directors' contributions are not matched by the Company. Since inception of the plan, this discretionary contribution provision has been limited to a matching of the participants' contributions on a basis equivalent to matching permitted under the Company's 401(k) Retirement Savings Plan. The vesting of contributions to the participants' accounts is also equivalent to the vesting requirements of the Company's 401(k) Retirement Savings Plan. The Deferred Compensation Plan does not have dollar limits on tax-deferred contributions. The assets of the Deferred Compensation Plan are held in a Rabbi Trust (the "Trust") and, therefore, are available to satisfy the claims of the Company's creditors in the event of bankruptcy or insolvency of the Company. Participants have the ability to direct the Plan Administrator to invest the assets in their individual accounts, including any discretionary contributions by the Company, in over 30 preapproved mutual funds held by the Trust which cover a variety of securities and mutual funds. In addition, participants currently have the right to request that the Plan Administrator re-allocate the portfolio of investments (i.e. cash or mutual funds) in the participants' individual accounts within the Trust. Company contributions are in the form of cash. Distributions from the plan are generally made upon the participants' termination as a director and/or employee, as applicable, of the Company. Participants receive payments from the Deferred Compensation Plan in cash. As of December 31, 2020, Trust assets totaled $22.8 million, the majority of which is classified as "Other noncurrent assets" in the Company's consolidated balance sheet. The fair value of the investments was based on quoted market prices in active markets (a Level 1 fair value measurement). Amounts payable to the plan participants as of December 31, 2020, including the fair value of the shares of the Company's common stock that are reflected as treasury stock, was $22.8 million and is classified as "Other noncurrent liabilities" in the Company's consolidated balance sheet. The Company accounts for the Deferred Compensation Plan in accordance with current accounting standards regarding the accounting for deferred compensation arrangements where amounts earned are held in the Trust and invested. Increases or decreases in the value of the Trust assets, exclusive of the shares of common stock of the Company held by the Trust, have been included as compensation adjustments in the consolidated statements of operations. Increases or decreases in the fair value of the deferred compensation liability, including the shares of common stock of the Company held by the Trust, while recorded as treasury stock, are also included as compensation adjustments in the consolidated statements of operations.

Retirement Plans

Retirement Plans	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Retirement Plans	Retirement PlansThe Company sponsors defined contribution plans. Participation in these plans is available to substantially all employees. The Company recognized expenses of $3.4 million, $9.5 million and $8.6 million, respectively, related to matching contributions under its various defined contribution plans during the years ended December 31, 2020, 2019 and 2018, respectively. In the second quarter of 2020, the Company suspended matching contributions to the Company's 401(k) Retirement Savings Plan in response to the significant decline in activity levels due to the COVID-19 pandemic.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The impact of the COVID-19 pandemic and related economic, business and market disruptions continues to evolve and its future effects remain uncertain. The most direct and immediate impact that the Company has experienced and expects to continue to experience from the COVID-19 pandemic is decreased demand for its products and services due to lower activity levels by its customers resulting from the precipitous decline in crude oil prices. The overall impact of the pandemic and oil price collapse on the Company and its customers will depend on numerous factors, many of which are beyond management's control and knowledge. In response to public health concerns related to COVID-19, many federal, state, local and other authorities around the world have imposed mandatory regulations directing individuals to stay at home and have limited their ability to travel domestically or internationally. In certain cases, when travel is permitted, a multi-week quarantine period is required before an individual can work in the area. Additionally, rules and regulations regarding employer responsibilities continue to be promulgated. Facility closures, quarantines, travel restrictions, and possible future workforce shortages may, among numerous other impacts, result in delays by the Company in fulfilling its existing contractual obligations to its customers, which could result in adverse financial consequences. Additionally, the Company procures a variety of raw materials and component products, including steel, in the manufacture of its products from companies which may be impacted by similar challenges. The Company continues to monitor the effect of COVID-19 on its employees, customers, critical suppliers and other stakeholders. The ultimate magnitude and duration of the COVID-19 pandemic, resulting governmental restrictions placing limitations on the mobility and ability to work of the worldwide population, and the related impact on crude oil prices and the U.S. and global economy and capital markets remains uncertain. Following the GEODynamics Acquisition in January 2018, the Company determined that certain steel products historically imported by GEODynamics from China for use in its manufacturing process were potentially be subject to anti-dumping and countervailing duties. Following an internal review, the Company voluntarily disclosed this matter to U.S. Customs and Border Protection ("CBP") and, in December 2020, reached an agreement with CBP to settle this matter for $7.3 million. The Company believes that the Seller is required to indemnify and hold the Company harmless against the amount of this and other settlements and related costs of $7.9 million, and the Company has provided notice to and asserted indemnification claims against the Seller. Additionally, the Company believes that its agreements with the Seller allow it to set-off such amounts against payments due under the $25.0 million promissory note and that, because the Company has asserted indemnification claims, the maturity date of the note is extended until the resolution of such claims. Accordingly, the Company has reduced the carrying amount of such note in its consolidated balance sheet to $17.1 million as of December 31, 2020, which is the Company's current best estimate of what is owed after set-off for indemnification matters. In August 2020, the Seller filed a breach of contract suit against the Company and one of its wholly-owned subsidiaries in federal court alleging that payments due under the promissory note are required to be, but have not been, repaid in accordance with the terms of the note. Additionally, the Seller alleged that it was entitled to approximately $19 million in U.S. federal income tax carryback claims received by the Company under the provisions of the CARES Act. On February 15, 2021, the Seller dismissed the federal lawsuit without prejudice and refiled in state court. The Company denies the validity of these breach of contract claims and plans to vigorously defend against this lawsuit. The Company is a party to various other pending or threatened claims, lawsuits and administrative proceedings seeking damages or other remedies concerning its commercial operations, products, employees and other matters, including occasional claims by individuals alleging exposure to hazardous materials as a result of the Company's products or operations. Some of these claims relate to matters occurring prior to the acquisition of businesses, and some relate to businesses the Company has sold. In certain cases, the Company is entitled to indemnification from the sellers of businesses and, in other cases, the Company has indemnified the buyers of businesses. Although the Company can give no assurance about the outcome of pending legal and administrative proceedings and the effect such outcomes may have on the Company, management believes that any ultimate liability resulting from the outcome of such proceedings, to the extent not otherwise provided for or covered by indemnity or insurance, will not have a material adverse effect on the Company's consolidated financial position, results of operations or liquidity.

Segments and Related Informatio

Segments and Related Information	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Segments and Related Information	Segments and Related Information The Company's reportable segments represent strategic business units that offer different products and services. They are managed separately as each business requires different technologies and marketing strategies. Recent acquisitions, except for the GEODynamics Acquisition, have been direct extensions to existing business segments. Accounting policies of the segments are the same as those described in the summary of significant accounting policies. The Well Site Services segment provides a broad range of equipment and services that are used to drill for, establish and maintain the flow of oil and natural gas from a well throughout its life cycle. In this segment, operations primarily include completion-focused equipment and services. The segment provides solutions to its customers using its completion tools, drilling rigs and highly-trained personnel throughout its service offerings which include wireline support, frac stacks, isolation tools, extended reach tools, ball launchers, well testing and flowback operations, thru tubing activity, sand control and land drilling. Separate business lines within the Well Site Services segment have been disclosed to provide additional detail with respect to its operations. The Downhole Technologies segment provides oil and gas perforation systems and downhole tools in support of completion, intervention, wireline and well abandonment operations. This segment designs, manufactures and markets its consumable engineered products to oilfield service as well as exploration and production companies, which are completing complex wells with longer lateral lengths, increased frac stages and more perforation clusters to increase unconventional well productivity. The Offshore/Manufactured Products segment designs, manufactures and markets capital equipment utilized on floating production systems, subsea pipeline infrastructure, and offshore drilling rigs and vessels, along with short-cycle and other products. Driven principally by longer-term customer investments for offshore oil and natural gas projects, project-driven product revenues include flexible bearings, advanced connector systems, high-pressure riser systems, deepwater mooring systems, cranes, subsea pipeline products and blow-out preventer stack integration. Short-cycle products manufactured by the segment include valves, elastomers and other specialty products generally used in the land-based drilling and completion markets. Other products manufactured and offered by the segment include a variety of products for use in industrial, military and other applications outside the oil and gas industry. The segment also offers a broad line of complementary, value-added services including specialty welding, fabrication, cladding and machining services, offshore installation services, and inspection and repair services. Corporate information includes corporate expenses, such as those related to corporate governance, stock-based compensation and other infrastructure support, as well as impacts from corporate-wide decisions for which individual operating units are not evaluated. Financial information by business segment for each of the three years ended December 31, 2020, 2019 and 2018, is summarized in the following table (in thousands). Revenues Depreciation and amortization Operating income (loss) Capital expenditures Total 2020 Well Site Services - Completion Services (1) $ 191,529 $ 52,922 $ (187,869) $ 6,823 $ 241,038 Drilling Services (2) 8,310 318 (5,519) 114 3,894 Total Well Site Services 199,839 53,240 (193,388) 6,937 244,932 Downhole Technologies (3) 97,936 22,649 (224,414) 3,230 280,096 Offshore/Manufactured Products (4) 340,300 21,881 (80,794) 2,913 547,962 Corporate — 773 (35,744) (331) 79,270 Total $ 638,075 $ 98,543 $ (534,340) $ 12,749 $ 1,152,260 2019 Well Site Services - Completion Services $ 390,748 $ 68,440 $ (11,621) $ 30,806 $ 459,078 Drilling Services (5) 41,346 9,973 (43,419) 2,664 19,171 Total Well Site Services 432,094 78,413 (55,040) 33,470 478,249 Downhole Technologies (6) 182,314 21,247 (164,008) 13,808 529,677 Offshore/Manufactured Products 402,946 22,842 36,022 7,692 677,036 Corporate — 817 (45,154) 1,146 42,905 Total $ 1,017,354 $ 123,319 $ (228,180) $ 56,116 $ 1,727,867 2018 Well Site Services - Completion Services $ 411,019 $ 66,415 $ (7,647) $ 50,423 $ 523,235 Drilling Services 69,235 14,354 (9,363) 6,591 64,661 Total Well Site Services 480,254 80,769 (17,010) 57,014 587,896 Downhole Technologies 213,813 18,649 26,705 16,167 691,874 Offshore/Manufactured Products 394,066 23,207 38,914 13,797 683,285 Corporate — 905 (54,485) 1,046 40,766 Total $ 1,088,133 $ 123,530 $ (5,876) $ 88,024 $ 2,003,821 ___________ (1) Operating loss in 2020 included a non-cash inventory impairment charge of $9.0 million and a non-cash goodwill impairment charge of $127.1 million to reduce the carrying value of the Completion Services reporting unit to its estimated fair value and non-cash fixed asset impairment charges of $3.6 million to reduce the carrying value of certain of the unit's facilities to their estimated realizable value. (2) Operating loss in 2020 included a non-cash fixed asset impairment charge of $5.2 million to further reduce the carrying value of the Drilling Services business's fixed assets to their estimated realizable value. (3) Operating loss in 2020 included a non-cash inventory impairment charge of $5.9 million, non-cash fixed and operating lease impairment charges of $3.6 million to reduce the carrying of these assets to their estimated realizable value and a non-cash goodwill impairment charge of $192.5 million to reduce the carrying value of the Downhole Technologies reporting unit to its estimated fair value. (4) Operating loss in 2020 included a non-cash inventory impairment charge of $16.2 million and a non-cash goodwill impairment charge of $86.5 million to reduce the carrying value of the Offshore/Manufactured Products reporting unit to its estimated fair value. (5) In late 2019, the Company reduced the scope of its Drilling Services business (adjusting from 34 rigs to 9 rigs) due to weakness in customer demand for vertical drilling rigs in the U.S. land market. Operating loss for the Drilling Services business included a non-cash fixed asset impairment charge of $33.7 million. (6) Operating loss in 2019 for the Downhole Technologies segment included a non-cash goodwill impairment charge of $165.0 million. See Note 3, "Asset Impairments and Other Charges," Note 4, "Details of Selected Balance Sheet Accounts," Note 6, “Goodwill and Other Intangible Assets,” and Note 8, "Operating Leases," for further discussion of these and other charges. No customer individually accounted for greater than 10% of the Company's 2020 or 2019 consolidated revenues or individually accounted for greater than 10% of the Company's consolidated accounts receivable at December 31, 2020. One customer accounted for 10% of the Company's 2018 consolidated revenues. For the Company's Well Site Services segment, substantially all depreciation and amortization expense relates to cost of services while substantially all depreciation and amortization expense for the Downhole Technologies segment relates to cost of products. The Offshore/Manufactured Products segment has numerous facilities around the world that generate both product and service revenues, and it is common for the segment to provide both installation and other services for products manufactured by this segment. While substantially all depreciation and amortization expense for the Offshore/Manufactured Products segment relates to cost of revenues, it does not segregate or capture depreciation or amortization expense of intangible assets between product and service cost. Operating income (loss) excludes equity in net income of unconsolidated affiliates, which is immaterial and not reported separately herein. The following table provides supplemental disaggregated revenue from contracts with customers by business segment for the three years ended December 31, 2020, 2019 and 2018 (in thousands): Well Site Services Downhole Technologies Offshore/Manufactured Products 2020 2019 2018 2020 2019 2018 2020 2019 2018 Major revenue categories - Project-driven products $ — $ — $ — $ — $ — $ — $ 165,497 $ 159,205 $ 120,894 Short-cycle: Completion products and services 191,529 390,748 411,019 97,936 182,314 213,813 26,148 95,806 116,383 Drilling services 8,310 41,346 69,235 — — — — — — Other products — — — — — — 21,994 27,416 27,984 Total short-cycle 199,839 432,094 480,254 97,936 182,314 213,813 48,142 123,222 144,367 Other products and services — — — — — — 126,661 120,519 128,805 $ 199,839 $ 432,094 $ 480,254 $ 97,936 $ 182,314 $ 213,813 $ 340,300 $ 402,946 $ 394,066 Financial information by geographic location for each of the three years ended December 31, 2020, 2019 and 2018, is summarized below (in thousands). Revenues are attributable to countries based on the location of the entity selling the products or performing the services and include export sales. Long-lived assets are attributable to countries based on the physical location of the operations and its operating assets and do not include intercompany receivable balances. United States United Singapore Other Total 2020 Revenues from unaffiliated customers $ 463,382 $ 76,808 $ 57,513 $ 40,372 $ 638,075 Long-lived assets 554,926 78,622 16,509 48,883 698,940 2019 Revenues from unaffiliated customers $ 831,317 $ 70,641 $ 56,170 $ 59,226 $ 1,017,354 Long-lived assets 1,046,250 81,855 18,260 69,372 1,215,737 2018 Revenues from unaffiliated customers $ 930,151 $ 64,564 $ 37,938 $ 55,480 $ 1,088,133 Long-lived assets 1,278,504 74,394 19,116 70,732 1,442,746

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2020
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions GEODynamics historically leased certain land and facilities from an equity holder and former employee of the Company, following the GEODynamics Acquisition. In connection with the GEODynamics Acquisition, the Company assumed these leases. The Company exercised its option to purchase the most significant leased facility and associated land for approximately $5.4 million in September 2018. Rent expense related to leases with this former employee for the years ended December 31, 2020, 2019 and 2018 totaled $44 thousand, $157 thousand and $330 thousand, respectively. Additionally, in 2020 and 2019, GEODynamics purchased products from and sold products to a company in which this former employee is an investor. In 2020, sales to this company were $1.8 million. In 2019, sales to this company were $1.4 million and purchases from this company were $1.3 million.

Valuation Allowances

Valuation Allowances	12 Months Ended
	Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Valuation Allowances	Valuation Allowances Activity in the valuation accounts was as follows (in thousands): Balance at Beginning of Period Charged to Costs and Expenses Deductions (net of recoveries) Translation and Other, Net (1) Balance at End of Period Year Ended December 31, 2020: Allowance for doubtful accounts receivable $ 8,745 $ 3,409 $ (5,049) $ 1,199 $ 8,304 Allowance for excess or obsolete inventory 19,031 32,974 (11,719) 445 40,731 Valuation allowance on deferred tax assets 35,828 1,890 — (2,221) 35,497 Year Ended December 31, 2019: Allowance for doubtful accounts receivable $ 6,701 $ 2,776 $ (819) $ 87 $ 8,745 Allowance for excess or obsolete inventory 18,551 3,040 (2,644) 84 19,031 Valuation allowance on deferred tax assets 33,762 2,558 — (492) 35,828 Year Ended December 31, 2018: Allowance for doubtful accounts receivable $ 7,316 $ 1,520 $ (887) $ (1,248) $ 6,701 Allowance for excess or obsolete inventory 15,649 2,683 (2,917) 3,136 18,551 Valuation allowance on deferred tax assets 37,904 (4,124) — (18) 33,762 ____________________ (1) For the year ended December 31, 2018, amount presented within allowance for doubtful accounts receivables and excess or obsolete inventory included $0.6 million and $3.3 million, respectively, related to the acquired GEODynamics operations.

Quarterly Financial Information

Quarterly Financial Information (Unaudited)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information (Unaudited)	Quarterly Financial Information (Unaudited) The following table summarizes quarterly financial information for 2020 and 2019 (in thousands, except per share amounts): First Quarter (1) Second Quarter (2) Third Quarter (3) Fourth Quarter (4) 2020 Revenues $ 219,694 $ 146,245 $ 134,759 $ 137,377 Gross profit (5) (4,156) (6,301) (9,885) (1,159) Net loss (405,041) (24,626) (19,969) (18,747) Basic and diluted net loss per share (6.79) (0.41) (0.33) (0.31) 2019 Revenues $ 250,611 $ 264,685 $ 263,697 $ 238,361 Gross profit (5) 19,452 24,872 31,431 16,508 Net loss (14,648) (9,740) (31,868) (175,552) Basic and diluted net loss per share (0.25) (0.16) (0.54) (2.95) ____________________ (1) During the first quarter of 2020, the Company recognized non-cash goodwill impairment charges of $406.1 million (pre-tax), a non-cash fixed asset impairment charge of $5.2 million (pre-tax), non-cash inventory charges of $25.2 million (pre-tax) and severance and restructuring charges of $0.7 million (pre-tax). During the first quarter of 2019, the Company recognized $1.0 million (pre-tax) of severance and restructuring charges. (2) During the second quarter of 2020, the Company recognized a non-cash fixed asset impairment charge of $3.0 million (pre-tax) and severance and restructuring charges of $5.4 million (pre-tax). During the second quarter of 2019, the Company recognized $1.3 million (pre-tax) of severance and restructuring charges. (3) During the third quarter of 2020, the Company recognized a non-cash inventory impairment charge of $5.9 million (pre-tax) and severance charges of $0.3 million (pre-tax). During the third quarter of 2019, the Company recognized a non-cash fixed asset impairment charge of $33.7 million (pre-tax) and $0.7 million (pre-tax) of severance and restructuring charges. (4) During the fourth quarter of 2020, the Company recognized non-cash fixed asset and lease impairment charges of $4.3 million (pre-tax) and severance and restructuring charges of $2.7 million (pre-tax). During the fourth quarter of 2019, the Company recognized a non-cash goodwill impairment charge of $165.0 million (pre-tax) and $0.6 million (pre-tax) of severance and restructuring charges. (5) Gross profit is calculated as revenues less costs of products and services and segment level depreciation and amortization expense. The calculation of gross profit excluded non-cash goodwill and fixed asset impairment charges totaling $411.3 million in the first quarter of 2020, a non-cash fixed asset impairment charge of $3.0 million in the second quarter of 2020 and non-cash fixed asset and lease impairment charges totaling $4.3 million in the fourth quarter of 2020. The calculation of gross profit excluded the $33.7 million non-cash fixed asset impairment charge recognized in the third quarter of 2019 and the $165.0 million non-cash goodwill impairment charge recognized in the fourth quarter of 2019. Amounts are calculated independently for each of the quarters presented. Therefore, the sum of the quarterly amounts may not equal the total calculated for the year.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates As further discussed in Note 14, "Commitments and Contingencies," the impact of the Coronavirus Disease 2019 ("COVID-19") pandemic and the related economic, business and market disruptions continues to evolve and its future effects remain uncertain. The actual impact of these developments on the Company will depend on numerous factors, many of which are beyond management's control and knowledge. It is therefore difficult for management to assess or predict with precision the broad future effect of this health crisis on the global economy, the energy industry or the Company. During 2020, the Company recorded asset impairments, severance and restructuring charges in response to these recent developments, as further discussed in Note 3, "Asset Impairments and Other Charges." As additional information becomes available, events or circumstances change and strategic operational decisions are made by management, further adjustments may be required which could have a material adverse impact on the Company's consolidated financial position, results of operations and cash flows. The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States requires the use of estimates and assumptions by management in determining the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Examples of such estimates include goodwill and long-lived asset impairments, revenue and income recognized over time, valuation allowances recorded on deferred tax assets, the fair value of assets and liabilities acquired including identification of associated goodwill and intangible assets, reserves on inventory, allowances for doubtful accounts, settlement of litigation and potential future adjustments related to contractual indemnification and other agreements. Actual results could materially differ from those estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents All highly liquid investments purchased with an original maturity of three months or less are classified as cash equivalents.
Fair Value of Financial Instruments	Fair Value of Financial InstrumentsFinancial instruments consist of cash and cash equivalents, investments, receivables, payables and debt instruments. The carrying values of these instruments, other than the 1.50% convertible senior notes due February 2023 (the "Notes") described in Note 7, "Long-term Debt," on the accompanying consolidated balance sheets, approximates their fair values.
Inventories	Inventories Inventories consist of consumable oilfield products, manufactured equipment, spare parts for manufactured equipment, and work-in-process. Inventories also include raw materials, labor, subcontractor charges, manufacturing overhead and supplies and are carried at the lower of cost or net realizable value. The cost of inventories is determined on an average cost or specific-identification method. A reserve for excess and/or obsolete inventory is maintained based on the age, turnover, condition, expected near-term utility and market pricing of the goods.
Property, Plant and Equipment	Property, Plant, and Equipment Property, plant, and equipment are recorded at cost, or at estimated fair market value at acquisition date if acquired in a business combination, and depreciation is computed, for assets owned or recorded under a finance lease, using the straight-line method over the estimated useful lives of the assets, after allowing for estimated salvage value where applicable. Leasehold improvements are capitalized and amortized over the lesser of the life of the lease or the estimated useful life of the asset. Expenditures for repairs and maintenance are charged to expense when incurred. Expenditures for major renewals and betterments, which extend the useful lives of existing equipment, are capitalized and depreciated. Upon retirement or disposition of property and equipment, the cost and related accumulated depreciation are removed from the accounts and any resulting gain or loss is recognized in the statements of operations.
Goodwill	Goodwill Goodwill represents the excess after impairments, if applicable, of the purchase price for acquired businesses over the allocated fair value of related net assets. In accordance with current accounting guidance, the Company does not amortize goodwill, but rather assesses goodwill for impairment annually and when an event occurs or circumstances change that indicate the carrying amounts may not be recoverable. In the evaluation of goodwill, each reporting unit with goodwill on its balance sheet is assessed separately using relevant events and circumstances. Management estimates the fair value of each reporting unit and compares that fair value to its recorded carrying value. Management utilizes, depending on circumstances, a combination of valuation methodologies including a market approach and an income approach, as well as guideline public company comparables. Projected cash flows are discounted using a long-term weighted average cost of capital for each reporting unit based on estimates of investment returns that would be required by a market participant. As part of the process of assessing goodwill for potential impairment, the total market capitalization of the Company is compared to the sum of the fair values of all reporting units to assess the reasonableness of aggregated fair values. If the carrying amount of a reporting unit exceeds its fair value, goodwill is considered impaired and an impairment loss is recorded. As further discussed in Note 6, "Goodwill and Other Intangible Assets," the Company recognized non-cash goodwill impairment charges of $406.1 million in the first quarter of 2020 and $165.0 million in the fourth quarter of 2019. These impairment charges did not impact the Company's liquidity position, debt covenants or cash flows.
Long-Lived Assets	Long-Lived Assets The Company amortizes the cost of long-lived assets, including finite-lived intangible assets, over their estimated useful life. The recoverability of the carrying values of long-lived assets is assessed at the asset group level whenever, in management's judgment, events or changes in circumstances indicate that the carrying value of such asset groups may not be recoverable based on estimated undiscounted future cash flows. If this assessment indicates that the carrying values will not be recoverable, an impairment loss equal to the excess of the carrying value over the fair value of the asset group is recognized. The fair value of the asset group is based on appraised values, prices of similar assets (if available), or discounted cash flows.
Leases	Leases The Company leases a portion of its facilities, office space, equipment and vehicles under contracts which provide it with the right to control identified assets. The Company recognizes the right to use identified assets under operating leases (with an initial term of greater than 12 months) as operating lease assets and the related obligations to make payments under the lease arrangements as operating lease liabilities. Finance lease obligations, which are not material, are classified within long-term debt while related assets are included within property, plant and equipment. Lease assets and liabilities are recorded at the commencement date based on the present value of lease payments over the lease term. The Company has lease agreements with lease and non-lease components, which are generally accounted for as a single lease component. Most of the Company's leases do not provide an implicit interest rate. Therefore, the Company's incremental borrowing rate, based on available information at the lease commencement date, is used to determine the present value of lease payments. Most of the Company's operating leases include one or more options to renew, with renewal terms that can extend the lease term from one
Research and Development Costs	Research and Development CostsCosts incurred internally in researching and developing products are charged to expense until technological feasibility has been established for the product.
Foreign Currency and Other Comprehensive Loss, Currency Exchange Rate Risk	Foreign Currency and Other Comprehensive Loss Gains and losses resulting from balance sheet translation of international operations where the local currency is the functional currency are included as a component of accumulated other comprehensive loss within stockholders' equity and represent substantially all of the accumulated other comprehensive loss balance. Remeasurements of intercompany advances denominated in a currency other than the functional currency of the entity that are of a long-term investment nature are recognized as a separate component of other comprehensive loss within stockholders' equity. Gains and losses resulting from balance sheet remeasurements of assets and liabilities denominated in a different currency than the functional currency, other than intercompany advances that are of a long-term investment nature, are included in the consolidated statements of operations within "other operating income, net" as incurred and were not material during the periods presented. Currency Exchange Rate Risk
Revenue and Cost Recognition	Revenue and Cost Recognition The Company's revenue contracts may include one or more promises to transfer a distinct good or service to the customer, which is referred to as a "performance obligation," and to which revenue is allocated. The Company recognizes revenue and the related cost when, or as, the performance obligations are satisfied. The majority of significant contracts for custom engineered products have a single performance obligation as no individual good or service is separately identifiable from other performance obligations in the contracts. For contracts with multiple distinct performance obligations, the Company allocates revenue to the identified performance obligations in the contract. The Company's product sales terms do not include significant post-performance obligations. The Company's performance obligations may be satisfied at a point in time or over time as work progresses. Revenues from products and services transferred to customers at a point in time accounted for approximately 38%, 34% and 29% of consolidated revenues for the years ended December 31, 2020, 2019 and 2018, respectively. The majority of the Company's revenue recognized at a point in time is derived from short-term contracts for standard products. Revenue on these contracts is recognized when control over the product has transferred to the customer. Indicators the Company considers in determining when transfer of control to the customer occurs include: right to payment for the product, transfer of legal title to the customer, transfer of physical possession of the product, transfer of risk and customer acceptance of the product. Revenues from products and services transferred to customers over time accounted for approximately 62%, 66% and 71% of consolidated revenues for the years ended December 31, 2020, 2019 and 2018, respectively. The majority of the Company's revenue recognized over time is for services provided under short-term contracts, with revenue recognized as the customer receives and consumes the services. In addition, the Company manufactures certain products to individual customer specifications under short-term contracts for which control passes to the customer as the performance obligations are fulfilled and for which revenue is recognized over time. For significant project-related contracts involving custom engineered products within the Offshore/Manufactured Products segment (also referred to as "project-driven products"), revenues are typically recognized over time using an input measure such as the percentage of costs incurred to date relative to total estimated costs at completion for each contract (cost-to-cost method). Contract costs include labor, material and overhead. Management believes this method is the most appropriate measure of progress on large contracts. Billings on such contracts in excess of costs incurred and estimated profits are classified as a contract liability (deferred revenue). Costs incurred and estimated profits in excess of billings on these contracts are recognized as a contract asset (a component of accounts receivable). Contract estimates for project-related contracts involving custom engineered products are based on various assumptions to project the outcome of future events that may span several years. Changes in assumptions that may affect future project costs and margins include production efficiencies, the complexity of the work to be performed and the availability and costs of labor, materials and subcomponents. As a significant change in one or more of these estimates could affect the profitability of the Company's contracts, contract-related estimates are reviewed regularly. The Company recognizes adjustments in estimated costs and profits on contracts in the period the adjustment is identified. Revenue and profit in future periods of contract performance are recognized using the adjusted estimate. If at any time the estimate of contract profitability indicates an anticipated loss will be incurred on the contract, the full loss is recognized in the period it is identified. Product costs and service costs include all direct material and labor costs and those costs related to contract performance, such as indirect labor, supplies, tools and repairs. As disclosed in the consolidated statements of operations, product costs and service costs exclude depreciation and amortization expense and impairment of fixed assets, which are separately presented. Selling, general and administrative costs are charged to expense as incurred. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, and that are collected by the Company from a customer, are excluded from revenue. Shipping and handling costs associated with outbound freight after control over a product has transferred to a customer are accounted for as a fulfillment cost and are included in cost of products. Proceeds from customers for the cost of oilfield rental equipment that is damaged or lost downhole are reflected as gains or losses on the disposition of assets after considering the write-off of the remaining net book value of the equipment.
Income Taxes	Income Taxes The Company follows the liability method of accounting for income taxes. Under this method, deferred income taxes are recorded based upon the differences between the financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws in effect at the time the underlying assets or liabilities are recovered or settled. As further discussed in Note 9, "Income Taxes," on December 22, 2017, legislation commonly known as the Tax Cuts and Jobs Act ("Tax Reform Legislation") was signed into law which enacted significant changes to U.S. tax and related laws, including certain key U.S. federal income tax provisions applicable to oilfield service and manufacturing companies such as the Company. In accordance with the Securities and Exchange Commission's Staff Accounting Bulletin No. 118, the Company recorded provisional estimates to reflect the effect of the Tax Reform Legislation on the Company's income tax assets and liabilities as of December 31, 2017. During 2018, the Company adjusted these provisional estimates based upon additional guidance issued by the Internal Revenue Service. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security ("CARES") Act was signed into law, which allowed the carryback of U.S. federal net operating losses. Prior to the enactment of the CARES Act, such tax losses could only be carried forward. As of December 31, 2020, the Company's total investment in foreign subsidiaries is considered to be indefinitely reinvested outside of the United States. The Company accounts for the U.S. tax effect of global intangible low-taxed income earned by foreign subsidiaries in the period that such income is earned. The Company records a valuation allowance in the reporting period when management believes that it is more likely than not that any deferred tax asset will not be realized. This assessment requires analysis of changes in tax laws as well as available positive and negative evidence, including consideration of losses in recent years, reversals of temporary differences, forecasts of future income and assessment of future business and tax planning strategies. During 2020, 2019 and 2018, the Company recorded valuation allowances primarily with respect to foreign and U.S. state net operating loss ("NOL") carryforwards. The calculation of tax liabilities involves assessing uncertainties regarding the application of complex tax regulations. The Company recognizes liabilities for tax expenses based on estimates of whether, and the extent to which, additional taxes will be due. If management ultimately determines that payment of these amounts is unnecessary, the liability is reversed and a tax benefit is recognized during the period in which management determines that the liability is no longer necessary. An additional charge is recorded as a provision for taxes in the period in which management determines that the recorded tax liability is less than the expected ultimate assessment.
Receivables and Concentration of Credit Risk	Receivables and Concentration of Credit Risk Based on the nature of its customer base, the Company does not believe that it has any significant concentrations of credit risk other than its concentration in the worldwide oil and gas industry. Note 15, "Segments and Related Information," provides further information with respect to the Company's geographic revenues and significant customers. The Company evaluates the credit-worthiness of significant customers' financial condition and, generally, the Company does not require significant collateral from its customers.
Allowances for Doubtful Accounts	Allowances for Doubtful Accounts The Company maintains allowances for estimated losses resulting from the inability of the Company's customers to make required payments. Determination of the collectability of amounts due from customers requires management to make judgments regarding future events and trends. Allowances for doubtful accounts are established through an assessment of the Company's portfolio on an individual customer and consolidated basis taking into account current and expected future market conditions and trends. This process consists of a thorough review of historical collection experience, current aging status of customer accounts, and financial condition of the Company's customers as well as political and economic factors in countries of operations and other customer-specific factors. Based on a review of these factors, the Company establishes or adjusts allowances for trade and unbilled receivables as well as contract assets. If the financial condition of the Company's customers were to deteriorate further, adversely affecting their ability to make payments, additional allowances may be required. If a customer receivable is deemed to be uncollectible, the receivable is charged-off against allowance for doubtful accounts.
Earnings per Share	Earnings per Share Basic earnings per share ("EPS") on the face of the accompanying consolidated statements of operations is computed by dividing the net income or loss applicable to the Company's common stockholders by the weighted average shares of outstanding common stock. The calculation of diluted EPS is similar to basic EPS, except that the denominator includes dilutive common stock equivalents and the income or loss in the numerator excludes the impact, if any, of dilutive common stock equivalents.
Stock-Based Compensation	Stock-Based Compensation The fair value of share-based payments is estimated using the quoted market price of the Company's common stock and pricing models as of the date of grant as further discussed in Note 12, "Long-Term Incentive and Deferred Compensation Plans." The resulting cost, net of estimated forfeitures, is recognized over the period during which an employee is required to provide service in exchange for the awards, usually the vesting period. In addition to service-based awards, the Company issues performance-based awards, which are conditional based upon Company performance and may vest in an amount that will depend on the Company's achievement of specified performance objectives.
Guarantees	Guarantees Some product sales in the Offshore/Manufactured Products segment are sold with an assurance warranty, generally ranging from 12 to 18 months. Parts and labor are covered under the terms of the warranty agreement. Warranty provisions are estimated based upon historical experience by product, configuration and geographic region.
Accounting for Contingencies	Accounting for Contingencies The Company has contingent liabilities and future claims for which estimates of the amount of the eventual cost to liquidate such liabilities are accrued. These liabilities and claims sometimes involve threatened or actual litigation where damages have been quantified and an assessment of exposure has been made and recorded in an amount estimated to cover the expected loss. Other claims or liabilities have been estimated based on their fair value or management's experience in such matters and, when appropriate, the advice of outside counsel or other outside experts. Upon the ultimate resolution of these uncertainties, future reported financial results will be impacted by the difference between the accruals and actual amounts paid in settlement. Examples of areas with important estimates of future liabilities include duties, income taxes, litigation, insurance claims, warranty claims, contractual claims and obligations and discontinued operations.
Recent Accounting Pronouncements	Recent Accounting Pronouncements From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board (the "FASB"), which are adopted by the Company as of the specified effective date. Unless otherwise discussed, management believes that the impact of recently issued standards, which are not yet effective, will not have a material impact on the Company's consolidated financial statements upon adoption. In August 2020, the FASB issued updated guidance to simplify the accounting for convertible instruments and contracts in an entity's own equity. This new guidance eliminated the requirement that the carrying value of convertible debt instruments, such as the Company's Notes, be allocated between the debt and equity components. As permitted under the standard, the Company adopted the new guidance on January 1, 2021, using the modified retrospective transition method. Adoption of the standard resulted in a $12.2 million increase in the net carrying value of the Notes, a $3.7 million decrease in deferred income taxes and an $8.5 million net decrease in stockholders' equity. The effective interest rate associated with the Notes after adoption decreased from approximately 6% to approximately 2%, which compares to the contractual interest rate of 1.50%.

Asset Impairments and Other Cha

Asset Impairments and Other Charges (Tables)	12 Months Ended
	Dec. 31, 2020
Restructuring and Related Activities [Abstract]
Schedule Of Asset Impairment Charges	As a result of these events, actions and assessments during 2020, the Company recorded the following charges (in thousands): Completion Services Drilling Services Downhole Technologies Offshore/ Corporate Pre-tax Total Tax After-tax Total Impairments of: Goodwill (Note 6) $ 127,054 $ — $ 192,502 $ 86,500 $ — $ 406,056 $ 19,600 $ 386,456 Fixed assets (Note 4) 3,647 5,198 1,623 — — 10,468 2,198 8,270 Operating lease assets (Note 8) — — 1,979 — — 1,979 416 1,563 Inventories (Note 4) 8,981 — 5,921 16,249 — 31,151 5,979 25,172 Severance and restructuring charges 4,094 217 2,018 1,355 1,385 9,069 1,904 7,165 During 2019, the Company recorded the following charges (in thousands): Completion Services Drilling Services Downhole Technologies Offshore/ Corporate Pre-tax Total Tax After-tax Total Impairments of: Goodwill (Note 6) $ — $ — $ 165,000 $ — $ — $ 165,000 $ — $ 165,000 Fixed assets (Note 4) — 33,697 — — — 33,697 7,076 26,621 Severance and restructuring charges 1,847 — — 1,655 — 3,502 735 2,767 During 2018, the Company recorded the following charges (in thousands): Completion Services Drilling Services Downhole Technologies Offshore/ Corporate Pre-tax Total Tax After-tax Total Patent defense costs $ — $ — $ 8,365 $ — $ — $ 8,365 $ 1,757 $ 6,608 Transaction-related costs (Note 5) — — 327 — 3,274 3,601 756 2,845 Fair Labor Standards Act claim settlements 3,034 — — — — 3,034 637 2,397 Severance and restructuring charges 151 — — 1,478 — 1,629 342 1,287

Details of Selected Balance S_2

Details of Selected Balance Sheet Accounts (Tables)	12 Months Ended
	Dec. 31, 2020
Details of Selected Balance Sheet Accounts [Abstract]
Schedule of Accounts Receivable	Additional information regarding selected balance sheet accounts as of December 31, 2020 and 2019 is presented below (in thousands). 2020 2019 Accounts receivable, net: Trade $ 109,294 $ 178,813 Unbilled revenue 23,173 28,341 Contract assets 35,870 26,034 Other 3,102 9,044 Total accounts receivable 171,439 242,232 Allowance for doubtful accounts (8,304) (8,745) $ 163,135 $ 233,487
Contract with Customer, Asset and Liability	2020 2019 Deferred revenue (contract liabilities) $ 43,384 $ 17,761
Schedule of Inventory	2020 2019 Inventories, net: Finished goods and purchased products $ 88,634 $ 107,691 Work in process 27,063 21,963 Raw materials 95,410 110,719 Total inventories 211,107 240,373 Allowance for excess or obsolete inventory (1) (40,731) (19,031) $ 170,376 $ 221,342 ____________________ (1) During 2020, the Company recorded impairment charges totaling $31.2 million to reduce the carrying value of inventories to their estimated net realizable value based on changes in expectations regarding the near-term utility, customer demand and market pricing of certain goods.
Property, Plant and Equipment	Estimated 2020 2019 Property, plant and equipment, net: Land $ 34,968 $ 37,507 Buildings and leasehold improvements 1 – 40 267,072 273,384 Machinery and equipment 2 – 28 239,986 246,826 Completion Services equipment 2 – 10 507,755 510,737 Office furniture and equipment 1 – 10 35,767 45,309 Vehicles 3 – 10 81,607 97,264 Construction in progress 7,207 13,281 Total property, plant and equipment 1,174,362 1,224,308 Accumulated depreciation (790,800) (764,584) $ 383,562 $ 459,724
Schedule of Other Noncurrent Assets	2020 2019 Other noncurrent assets: Deferred compensation plan $ 22,801 $ 22,268 Deferred income taxes 1,280 685 Other 5,646 5,748 $ 29,727 $ 28,701
Schedule of Accrued Liabilities	2020 2019 Accrued liabilities: Accrued compensation $ 18,463 $ 27,428 Insurance liabilities 7,694 9,108 Accrued taxes, other than income taxes 7,307 3,424 Accrued interest 2,202 2,387 Accrued commissions 1,416 1,481 Other 7,422 5,012 $ 44,504 $ 48,840

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Changes in the carrying amount of goodwill for the years ended December 31, 2020 and 2019 are as follows (in thousands): Well Site Services Downhole Technologies Offshore / Manufactured Total Completion Drilling Subtotal Balance as of December 31, 2018 Goodwill $ 221,582 $ 22,767 $ 244,349 $ 357,502 $ 162,462 $ 764,313 Accumulated impairment losses (94,528) (22,767) (117,295) — — (117,295) 127,054 — 127,054 357,502 162,462 647,018 Goodwill impairment (December 2019) — — — (165,000) — (165,000) Foreign currency translation — — — — 288 288 Balance as of December 31, 2019 $ 127,054 $ — $ 127,054 $ 192,502 $ 162,750 $ 482,306 Balance as of December 31, 2019 Goodwill $ 221,582 $ 22,767 $ 244,349 $ 357,502 $ 162,750 $ 764,601 Accumulated impairment losses (94,528) (22,767) (117,295) (165,000) — (282,295) 127,054 — 127,054 192,502 162,750 482,306 Goodwill impairments (March 2020) (127,054) — (127,054) (192,502) (86,500) (406,056) Foreign currency translation — — — — 239 239 Balance as of December 31, 2020 $ — $ — $ — $ — $ 76,489 $ 76,489 Balance as of December 31, 2020 Goodwill $ 221,582 $ 22,767 $ 244,349 $ 357,502 $ 162,989 $ 764,840 Accumulated impairment losses (221,582) (22,767) (244,349) (357,502) (86,500) (688,351) $ — $ — $ — $ — $ 76,489 $ 76,489
Schedule of Finite-Lived Intangible Assets	The following table presents the gross carrying amount and the related accumulated amortization for major intangible asset classes as of December 31, 2020 and 2019 (in thousands): 2020 2019 Other Intangible Assets Gross Accumulated Net Carrying Amount Gross Accumulated Net Carrying Amount Customer relationships $ 168,288 $ 55,380 $ 112,908 $ 168,278 $ 44,296 $ 123,982 Patents/Technology/Know-how 75,920 26,124 49,796 85,919 30,791 55,128 Noncompete agreements 16,044 14,742 1,302 17,125 11,061 6,064 Tradenames and other 53,708 11,965 41,743 53,708 8,791 44,917 Total other intangible assets $ 313,960 $ 108,211 $ 205,749 $ 325,030 $ 94,939 $ 230,091

Long-term Debt (Tables)

Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Schedule of Long-term Debt	As of December 31, 2020 and 2019, long-term debt consisted of the following (in thousands): 2020 2019 Revolving credit facility (1) $ 18,408 $ 50,534 1.50% convertible senior notes due February 2023 (2) 143,242 167,594 Promissory note 17,095 25,000 Other debt and finance lease obligations 4,792 5,041 Total debt 183,537 248,169 Less: Current portion (17,778) (25,617) Total long-term debt $ 165,759 $ 222,552 ____________________ (1) Presented net of $0.6 million and $1.4 million of unamortized debt issuance costs as of December 31, 2020 and 2019, respectively. (2) The outstanding principal amount of the 1.50% convertible senior notes was $157.4 million and $192.3 million as of December 31, 2020 and 2019, respectively. The following table presents the carrying amounts of the Notes in the Company's consolidated balance sheets (in thousands): December 31, 2020 2019 Principal amount of the liability component $ 157,369 $ 192,250 Less: Unamortized discount 12,308 21,544 Less: Unamortized issuance costs 1,819 3,112 Net carrying amount of the liability component $ 143,242 $ 167,594 Net carrying amount of the equity component $ 25,683 $ 25,683
Schedule of Maturities of Long-term Debt	Scheduled maturities of total debt as of December 31, 2020, are as follows (in thousands): 2021 $ 17,778 2022 19,126 2023 143,744 2024 485 2025 512 Thereafter 1,892 $ 183,537

Operating Leases (Tables)

Operating Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Carrying Value of Operating Lease Assets	The following table presents the carry value of operating lease assets in the Company's consolidated sheets (in thousands): 2020 2019 Operating lease assets, net $ 33,140 $ 43,616
Lease, Cost	The following table provides details regarding the components of operating lease expense based on the initial term of underlying agreements for the years ended December 31, 2020 and 2019 (in thousands): 2020 2019 Operating lease expense components: Leases with initial term of greater than 12 months $ 12,564 $ 11,972 Leases with initial term of 12 months or less 4,024 5,906 Total operating lease expense $ 16,588 $ 17,878 Weighted-average remaining lease term (years) 6.8 Weighted-average discount rate 5.0 %
Maturities of Operating Lease Liabilities	The following table provides the scheduled maturities of operating lease liabilities as of December 31, 2020 (in thousands): 2021 $ 9,293 2022 6,534 2023 5,204 2024 4,562 2025 4,461 Thereafter 13,787 Total lease payments 43,841 Less: Imputed interest (7,055) Present value of operating lease liabilities 36,786 Less: Current portion (7,620) Total long-term operating lease liabilities $ 29,166

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Schedule of Income before Income Tax, Domestic and Foreign	Consolidated loss before income taxes for the years ended December 31, 2020, 2019 and 2018 consisted of the following (in thousands): 2020 2019 2018 United States $ (534,452) $ (254,291) $ (29,424) Foreign 123 13,564 7,692 Total $ (534,329) $ (240,727) $ (21,732)
Schedule of Components of Income Tax Expense (Benefit)	Components of income tax benefit for the years ended December 31, 2020, 2019 and 2018 consisted of the following (in thousands): 2020 2019 2018 Current: United States $ (44,399) $ 300 $ (5,549) U.S. state 235 292 1,534 Foreign 2,622 5,958 4,877 (41,542) 6,550 862 Deferred: United States (20,913) (13,972) (2,592) U.S. state (1,798) (473) (95) Foreign (1,693) (1,024) (802) (24,404) (15,469) (3,489) Total income tax benefit $ (65,946) $ (8,919) $ (2,627)
Schedule of Effective Income Tax Rate Reconciliation	A reconciliation of the U.S. statutory tax benefit rate to the effective tax benefit rate for the years ended December 31, 2020, 2019 and 2018 is as follows: 2020 2019 2018 U.S. statutory tax benefit rate (21.0) % (21.0) % (21.0) % Impairments of goodwill 12.3 14.4 — Effect of CARES Act (3.1) — — Effect of Tax Reform Legislation — — (26.1) Valuation allowance against tax assets 0.3 0.8 14.0 Non-deductible compensation 0.1 0.3 5.7 Other non-deductible expenses 0.1 0.2 12.6 Effect of foreign income taxed at different rates 0.1 0.7 0.5 State income taxes, net of federal benefits (1.1) (0.4) (0.3) Other, net — 1.3 2.5 Effective tax benefit rate (12.3) % (3.7) % (12.1) %
Schedule of Deferred Tax Assets and Liabilities	The significant items giving rise to the deferred tax assets and liabilities as of December 31, 2020 and 2019 are as follows (in thousands): 2020 2019 Deferred tax assets: Foreign tax credit carryforwards $ 20,870 $ 20,360 Net operating loss carryforwards 37,838 54,772 Employee benefits 7,353 10,778 Inventory 9,696 7,725 Operating lease liabilities 6,697 8,171 Other 7,649 4,562 Gross deferred tax asset 90,103 106,368 Valuation allowance (35,497) (35,828) Net deferred tax asset 54,606 70,540 Deferred tax liabilities: Tax over book depreciation (27,613) (36,387) Intangible assets (30,392) (56,867) Convertible senior notes discount (2,790) (4,964) Operating lease assets (5,884) (8,047) Other (910) (1,669) Deferred tax liability (67,589) (107,934) Net deferred tax liability $ (12,983) $ (37,394)
Schedule of Deferred Tax Reclassifications	2020 2019 Balance sheet classification: Other non-current assets $ 1,280 $ 685 Deferred tax liability (14,263) (38,079) Net deferred tax liability $ (12,983) $ (37,394)

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Activity of Common Stock Issued and Outstanding	The following table provides details with respect to changes in the number of shares of common stock, $0.01 par value, issued, held in treasury and outstanding during 2020 and 2019 (in thousands). Issued Treasury Stock Outstanding Shares of common stock - December 31, 2018 71,754 11,784 59,970 Restricted stock awards, net of forfeitures 792 — 792 Shares withheld for taxes on vesting of restricted stock awards — 210 (210) Purchase of treasury stock — 51 (51) Shares of common stock - December 31, 2019 72,546 12,045 60,501 Restricted stock awards, net of forfeitures 743 — 743 Shares withheld for taxes on vesting of restricted stock awards — 239 (239) Shares of common stock - December 31, 2020 73,289 12,284 61,005

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The table below provides a reconciliation of the numerators and denominators of basic and diluted net loss per share for the years ended December 31, 2020, 2019 and 2018 (in thousands, except per share amounts): 2020 2019 2018 Numerators: Net loss $ (468,383) $ (231,808) $ (19,105) Less: Income attributable to unvested restricted stock awards — — — Numerator for basic net loss per share (468,383) (231,808) (19,105) Effect of dilutive securities: Unvested restricted stock awards — — — Numerator for diluted net loss per share $ (468,383) $ (231,808) $ (19,105) Denominators: Weighted average number of common shares outstanding 60,953 60,424 59,680 Less: Weighted average number of unvested restricted stock awards outstanding (1,141) (1,045) (968) Denominator for basic and diluted net loss per share 59,812 59,379 58,712 Net loss per share: Basic $ (7.83) $ (3.90) $ (0.33) Diluted (7.83) (3.90) (0.33)

Long-Term Incentive and Defer_2

Long-Term Incentive and Deferred Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	The following table presents changes in restricted stock awards and related information for the year ended December 31, 2020 (shares in thousands): Service-based Restricted Stock Performance-based Restricted Stock Number of Shares Weighted Average Grant Date Fair Value Number of Shares Weighted Average Grant Date Fair Value Total Number of Restricted Shares Unvested, December 31, 2019 1,064 $ 22.84 248 1,312 Granted 687 10.01 180 $ 11.15 867 Performance adjustment (1) — — 23 23 Vested (595) 24.44 (125) 62.66 (720) Forfeited (69) 19.42 (17) 11.15 (85) Unvested, December 31, 2020 1,087 14.07 310 1,397 ____________________ (1) Reflects an adjustment to the number of shares to be issued upon vesting of the 2018 performance-based awards.
Schedule of Share-based Compensation, Stock Options, Activity	The following table presents the changes in stock options outstanding (all exercisable) and related information for the year ended December 31, 2020 (shares in thousands): Options Weighted Average Exercise Price (1) Weighted Average Contractual Life (years) Aggregate Intrinsic Value (thousands) Outstanding Options, December 31, 2019 636 $ 48.81 3.0 $ — Forfeited/Expired (105) 49.52 Outstanding Options, December 31, 2020 530 48.67 2.3 — ____________________ (1) Exercise prices ranged from $41.60 to $58.54 as of December 31, 2020.

Segments and Related Informat_2

Segments and Related Information (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Financial information by business segment for each of the three years ended December 31, 2020, 2019 and 2018, is summarized in the following table (in thousands). Revenues Depreciation and amortization Operating income (loss) Capital expenditures Total 2020 Well Site Services - Completion Services (1) $ 191,529 $ 52,922 $ (187,869) $ 6,823 $ 241,038 Drilling Services (2) 8,310 318 (5,519) 114 3,894 Total Well Site Services 199,839 53,240 (193,388) 6,937 244,932 Downhole Technologies (3) 97,936 22,649 (224,414) 3,230 280,096 Offshore/Manufactured Products (4) 340,300 21,881 (80,794) 2,913 547,962 Corporate — 773 (35,744) (331) 79,270 Total $ 638,075 $ 98,543 $ (534,340) $ 12,749 $ 1,152,260 2019 Well Site Services - Completion Services $ 390,748 $ 68,440 $ (11,621) $ 30,806 $ 459,078 Drilling Services (5) 41,346 9,973 (43,419) 2,664 19,171 Total Well Site Services 432,094 78,413 (55,040) 33,470 478,249 Downhole Technologies (6) 182,314 21,247 (164,008) 13,808 529,677 Offshore/Manufactured Products 402,946 22,842 36,022 7,692 677,036 Corporate — 817 (45,154) 1,146 42,905 Total $ 1,017,354 $ 123,319 $ (228,180) $ 56,116 $ 1,727,867 2018 Well Site Services - Completion Services $ 411,019 $ 66,415 $ (7,647) $ 50,423 $ 523,235 Drilling Services 69,235 14,354 (9,363) 6,591 64,661 Total Well Site Services 480,254 80,769 (17,010) 57,014 587,896 Downhole Technologies 213,813 18,649 26,705 16,167 691,874 Offshore/Manufactured Products 394,066 23,207 38,914 13,797 683,285 Corporate — 905 (54,485) 1,046 40,766 Total $ 1,088,133 $ 123,530 $ (5,876) $ 88,024 $ 2,003,821 ___________ (1) Operating loss in 2020 included a non-cash inventory impairment charge of $9.0 million and a non-cash goodwill impairment charge of $127.1 million to reduce the carrying value of the Completion Services reporting unit to its estimated fair value and non-cash fixed asset impairment charges of $3.6 million to reduce the carrying value of certain of the unit's facilities to their estimated realizable value. (2) Operating loss in 2020 included a non-cash fixed asset impairment charge of $5.2 million to further reduce the carrying value of the Drilling Services business's fixed assets to their estimated realizable value. (3) Operating loss in 2020 included a non-cash inventory impairment charge of $5.9 million, non-cash fixed and operating lease impairment charges of $3.6 million to reduce the carrying of these assets to their estimated realizable value and a non-cash goodwill impairment charge of $192.5 million to reduce the carrying value of the Downhole Technologies reporting unit to its estimated fair value. (4) Operating loss in 2020 included a non-cash inventory impairment charge of $16.2 million and a non-cash goodwill impairment charge of $86.5 million to reduce the carrying value of the Offshore/Manufactured Products reporting unit to its estimated fair value. (5) In late 2019, the Company reduced the scope of its Drilling Services business (adjusting from 34 rigs to 9 rigs) due to weakness in customer demand for vertical drilling rigs in the U.S. land market. Operating loss for the Drilling Services business included a non-cash fixed asset impairment charge of $33.7 million. (6) Operating loss in 2019 for the Downhole Technologies segment included a non-cash goodwill impairment charge of $165.0 million. See Note 3, "Asset Impairments and Other Charges," Note 4, "Details of Selected Balance Sheet Accounts," Note 6, “Goodwill and Other Intangible Assets,” and Note 8, "Operating Leases," for further discussion of these and other charges.
Disaggregation of Revenue	The following table provides supplemental disaggregated revenue from contracts with customers by business segment for the three years ended December 31, 2020, 2019 and 2018 (in thousands): Well Site Services Downhole Technologies Offshore/Manufactured Products 2020 2019 2018 2020 2019 2018 2020 2019 2018 Major revenue categories - Project-driven products $ — $ — $ — $ — $ — $ — $ 165,497 $ 159,205 $ 120,894 Short-cycle: Completion products and services 191,529 390,748 411,019 97,936 182,314 213,813 26,148 95,806 116,383 Drilling services 8,310 41,346 69,235 — — — — — — Other products — — — — — — 21,994 27,416 27,984 Total short-cycle 199,839 432,094 480,254 97,936 182,314 213,813 48,142 123,222 144,367 Other products and services — — — — — — 126,661 120,519 128,805 $ 199,839 $ 432,094 $ 480,254 $ 97,936 $ 182,314 $ 213,813 $ 340,300 $ 402,946 $ 394,066
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas	Financial information by geographic location for each of the three years ended December 31, 2020, 2019 and 2018, is summarized below (in thousands). Revenues are attributable to countries based on the location of the entity selling the products or performing the services and include export sales. Long-lived assets are attributable to countries based on the physical location of the operations and its operating assets and do not include intercompany receivable balances. United States United Singapore Other Total 2020 Revenues from unaffiliated customers $ 463,382 $ 76,808 $ 57,513 $ 40,372 $ 638,075 Long-lived assets 554,926 78,622 16,509 48,883 698,940 2019 Revenues from unaffiliated customers $ 831,317 $ 70,641 $ 56,170 $ 59,226 $ 1,017,354 Long-lived assets 1,046,250 81,855 18,260 69,372 1,215,737 2018 Revenues from unaffiliated customers $ 930,151 $ 64,564 $ 37,938 $ 55,480 $ 1,088,133 Long-lived assets 1,278,504 74,394 19,116 70,732 1,442,746

Valuation Allowances (Tables)

Valuation Allowances (Tables)	12 Months Ended
	Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Summary of Valuation Allowance	Activity in the valuation accounts was as follows (in thousands): Balance at Beginning of Period Charged to Costs and Expenses Deductions (net of recoveries) Translation and Other, Net (1) Balance at End of Period Year Ended December 31, 2020: Allowance for doubtful accounts receivable $ 8,745 $ 3,409 $ (5,049) $ 1,199 $ 8,304 Allowance for excess or obsolete inventory 19,031 32,974 (11,719) 445 40,731 Valuation allowance on deferred tax assets 35,828 1,890 — (2,221) 35,497 Year Ended December 31, 2019: Allowance for doubtful accounts receivable $ 6,701 $ 2,776 $ (819) $ 87 $ 8,745 Allowance for excess or obsolete inventory 18,551 3,040 (2,644) 84 19,031 Valuation allowance on deferred tax assets 33,762 2,558 — (492) 35,828 Year Ended December 31, 2018: Allowance for doubtful accounts receivable $ 7,316 $ 1,520 $ (887) $ (1,248) $ 6,701 Allowance for excess or obsolete inventory 15,649 2,683 (2,917) 3,136 18,551 Valuation allowance on deferred tax assets 37,904 (4,124) — (18) 33,762 ____________________ (1) For the year ended December 31, 2018, amount presented within allowance for doubtful accounts receivables and excess or obsolete inventory included $0.6 million and $3.3 million, respectively, related to the acquired GEODynamics operations.

Quarterly Financial Informati_2

Quarterly Financial Information (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	The following table summarizes quarterly financial information for 2020 and 2019 (in thousands, except per share amounts): First Quarter (1) Second Quarter (2) Third Quarter (3) Fourth Quarter (4) 2020 Revenues $ 219,694 $ 146,245 $ 134,759 $ 137,377 Gross profit (5) (4,156) (6,301) (9,885) (1,159) Net loss (405,041) (24,626) (19,969) (18,747) Basic and diluted net loss per share (6.79) (0.41) (0.33) (0.31) 2019 Revenues $ 250,611 $ 264,685 $ 263,697 $ 238,361 Gross profit (5) 19,452 24,872 31,431 16,508 Net loss (14,648) (9,740) (31,868) (175,552) Basic and diluted net loss per share (0.25) (0.16) (0.54) (2.95) ____________________ (1) During the first quarter of 2020, the Company recognized non-cash goodwill impairment charges of $406.1 million (pre-tax), a non-cash fixed asset impairment charge of $5.2 million (pre-tax), non-cash inventory charges of $25.2 million (pre-tax) and severance and restructuring charges of $0.7 million (pre-tax). During the first quarter of 2019, the Company recognized $1.0 million (pre-tax) of severance and restructuring charges. (2) During the second quarter of 2020, the Company recognized a non-cash fixed asset impairment charge of $3.0 million (pre-tax) and severance and restructuring charges of $5.4 million (pre-tax). During the second quarter of 2019, the Company recognized $1.3 million (pre-tax) of severance and restructuring charges. (3) During the third quarter of 2020, the Company recognized a non-cash inventory impairment charge of $5.9 million (pre-tax) and severance charges of $0.3 million (pre-tax). During the third quarter of 2019, the Company recognized a non-cash fixed asset impairment charge of $33.7 million (pre-tax) and $0.7 million (pre-tax) of severance and restructuring charges. (4) During the fourth quarter of 2020, the Company recognized non-cash fixed asset and lease impairment charges of $4.3 million (pre-tax) and severance and restructuring charges of $2.7 million (pre-tax). During the fourth quarter of 2019, the Company recognized a non-cash goodwill impairment charge of $165.0 million (pre-tax) and $0.6 million (pre-tax) of severance and restructuring charges. (5) Gross profit is calculated as revenues less costs of products and services and segment level depreciation and amortization expense. The calculation of gross profit excluded non-cash goodwill and fixed asset impairment charges totaling $411.3 million in the first quarter of 2020, a non-cash fixed asset impairment charge of $3.0 million in the second quarter of 2020 and non-cash fixed asset and lease impairment charges totaling $4.3 million in the fourth quarter of 2020. The calculation of gross profit excluded the $33.7 million non-cash fixed asset impairment charge recognized in the third quarter of 2019 and the $165.0 million non-cash goodwill impairment charge recognized in the fourth quarter of 2019.

Organization and Basis of Pre_2

Organization and Basis of Presentation (Details)	12 Months Ended
	Dec. 31, 2020segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segments	3

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Narrative (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2020USD ($)renewal_option	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Impairments of goodwill	$ 406,100,000	$ 165,000,000	$ 406,056,000	$ 165,000,000	$ 0
Impairments of fixed and lease assets			$ 12,447,000	33,697,000	0
Number of renewal options | renewal_option			1
Research and development expense			$ 6,100,000	7,000,000	$ 6,600,000
Derivative, notional amount		$ 0	$ 0	$ 0
Remaining performance obligation in next twelve months, percentage			53.00%
Product warranty period, minimum			12 months
Product warranty period, maximum			18 months
Maximum amount of potential payment under guarantor obligation			$ 29,200,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Debt Instrument [Line Items]
Revenue, remaining performance obligation			$ 161,900,000
Revenue, remaining performance obligation, expected timing of satisfaction, period			1 year
Transferred at Point in Time
Debt Instrument [Line Items]
Percentage of revenue			38.00%	34.00%	29.00%
Transferred over Time
Debt Instrument [Line Items]
Percentage of revenue			62.00%	66.00%	71.00%
Minimum
Debt Instrument [Line Items]
Operating lease, extension term			1 year
Maximum
Debt Instrument [Line Items]
Operating lease, extension term			20 years
1.5% Convertible Unsecured Senior Notes
Debt Instrument [Line Items]
Stated interest rate		1.50%	1.50%	1.50%	1.50%
1.5% Convertible Unsecured Senior Notes | Convertible Debt
Debt Instrument [Line Items]
Stated interest rate			1.50%		1.50%
Principal amount of the liability component		$ 192,250,000	$ 157,369,000	$ 192,250,000
1.5% Convertible Unsecured Senior Notes | Convertible Debt | Fair Value, Inputs, Level 1 | Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Long term debt, fair value			$ 120,600,000

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - 1.5% Convertible Unsecured Senior Notes - USD ($) $ in Millions	Jan. 01, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stated interest rate		1.50%	1.50%	1.50%
Convertible Debt
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Effective interest rate percentage					6.00%
Stated interest rate		1.50%		1.50%
Convertible Debt | Subsequent Event
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Effective interest rate percentage	2.00%
Cumulative Effect, Period of Adoption, Adjustment | Convertible Debt | Subsequent Event
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt instrument, increase net	$ 12.2
Decrease in deferred income taxes	3.7
Net decrease, stockholders' equity	$ 8.5

Asset Impairment and Other Ch_2

Asset Impairment and Other Charges - Narrative (Details) - usd_per_barrel	1 Months Ended
	Mar. 31, 2020	Dec. 31, 2020
Restructuring and Related Activities [Abstract]
Percentage decline in crude oil prices	50.00%
Brent crude oil, price per barrel	15	44
WTI crude oil, price per barrel	21	43

Asset Impairment and Other Ch_3

Asset Impairment and Other Charges - Schedule of Asset Impairment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Impaired Long-Lived Assets Held and Used [Line Items]
Impairments of goodwill				$ 406,100	$ 165,000				$ 406,056	$ 165,000	$ 0
Impairment of goodwill, tax									19,600	0
Impairment of goodwill, net of tax									386,456	165,000
Impairment of fixed assets									10,468	33,697
Impairment of fixed assets, tax									2,198	7,076
Impairment of fixed assets, net of tax									8,270	26,621
Impairment of operating lease assets									1,979
Impairment of operating lease assets, tax									416
Impairment of operating lease assets, net of tax									1,563
Impairments of inventories				25,200					31,151	0	0
Impairment of inventories, tax									5,979
Impairment of inventories, net of tax									25,172
Impairment of patent defense costs											8,365
Impairment of patent defense costs, tax											1,757
Impairment of patent defense costs, net of tax											6,608
Impairment of transaction related costs,											3,601
Impairment of transaction related costs, tax											756
Impairment of transaction related costs, net of tax											2,845
Impairment of fair labor standards act claim settlements											3,034
Impairment of fair labor standards act claim settlements, tax											637
Impairment of fair labor standards act claim settlements, net of tax											2,397
Severance and restructuring charges	$ 2,700	$ 300	$ 5,400	700	600	$ 700	$ 1,300	$ 1,000	9,069	3,502	1,629
Severance and facility closure costs, tax									1,904	735	342
Severance and facility closure costs, net of tax									7,165	2,767	1,287
Corporate
Impaired Long-Lived Assets Held and Used [Line Items]
Impairments of goodwill									0	0
Impairment of fixed assets									0	0
Impairment of operating lease assets									0
Impairments of inventories									0
Impairment of patent defense costs											0
Impairment of transaction related costs,											3,274
Impairment of fair labor standards act claim settlements											0
Severance and restructuring charges									1,385	0	0
Total Well Site Services
Impaired Long-Lived Assets Held and Used [Line Items]
Impairments of goodwill									127,054	0
Total Well Site Services | Completion Services
Impaired Long-Lived Assets Held and Used [Line Items]
Impairments of goodwill									127,054	0
Impairment of fixed assets									3,600
Impairments of inventories									9,000
Total Well Site Services | Drilling Services
Impaired Long-Lived Assets Held and Used [Line Items]
Impairments of goodwill									0	0
Impairment of fixed assets									5,200	33,700
Total Well Site Services | Operating Segments | Completion Services
Impaired Long-Lived Assets Held and Used [Line Items]
Impairments of goodwill									127,054	0
Impairment of fixed assets									3,647	0
Impairment of operating lease assets									0
Impairments of inventories									8,981
Impairment of patent defense costs											0
Impairment of transaction related costs,											0
Impairment of fair labor standards act claim settlements											3,034
Severance and restructuring charges									4,094	1,847	151
Total Well Site Services | Operating Segments | Drilling Services
Impaired Long-Lived Assets Held and Used [Line Items]
Impairments of goodwill									0	0
Impairment of fixed assets			$ 3,000	5,200		$ 33,700			5,198	33,697
Impairment of operating lease assets									0
Impairments of inventories		$ 5,900							0
Impairment of patent defense costs											0
Impairment of transaction related costs,											0
Impairment of fair labor standards act claim settlements											0
Severance and restructuring charges									217	0	0
Downhole Technologies
Impaired Long-Lived Assets Held and Used [Line Items]
Impairments of goodwill					165,000				192,502	165,000
Impairment of operating lease assets									2,000
Impairments of inventories									5,900
Downhole Technologies | Drilling Services
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of fixed assets									1,600
Downhole Technologies | Operating Segments
Impaired Long-Lived Assets Held and Used [Line Items]
Impairments of goodwill				$ 406,100	$ 165,000				192,502	165,000
Impairment of fixed assets									1,623	0
Impairment of operating lease assets									1,979
Impairments of inventories									5,921
Impairment of patent defense costs											8,365
Impairment of transaction related costs,											327
Impairment of fair labor standards act claim settlements											0
Severance and restructuring charges									2,018	0	0
Offshore/Manufactured Products
Impaired Long-Lived Assets Held and Used [Line Items]
Impairments of inventories									16,200
Offshore/Manufactured Products | Operating Segments
Impaired Long-Lived Assets Held and Used [Line Items]
Impairments of goodwill									86,500	0
Impairment of fixed assets									0	0
Impairment of operating lease assets									0
Impairments of inventories									16,249
Impairment of patent defense costs											0
Impairment of transaction related costs,											0
Impairment of fair labor standards act claim settlements											0
Severance and restructuring charges									$ 1,355	$ 1,655	$ 1,478

Details of Selected Balance S_3

Details of Selected Balance Sheet Accounts - Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 171,439	$ 242,232
Allowance for doubtful accounts	(8,304)	(8,745)
Accounts receivable, net	163,135	233,487
Trade
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	109,294	178,813
Unbilled revenue
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	23,173	28,341
Contract assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	35,870	26,034
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 3,102	$ 9,044

Details of Selected Balance S_4

Details of Selected Balance Sheet Accounts - Contract Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Details of Selected Balance Sheet Accounts [Abstract]
Deferred revenue (contract liabilities)	$ 43,384	$ 17,761

Details of Selected Balance S_5

Details of Selected Balance Sheet Accounts - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)servicerig	Dec. 31, 2018USD ($)	Sep. 30, 2019rig
Segment Reporting Information [Line Items]
Increase (decrease) in contract with customer, asset	$ 9,800	$ 4,800
Contract with customer, asset, increase due to revenue recognized	32,400	25,000
Contract with customer, asset, reclassified to receivable	22,800	20,000
Increase (decrease) in contract with customer, liability	25,600	3,600
Contract with customer, liability, increase due to billings	41,600	12,200
Contract with customer, liability, revenue recognized	16,000	8,500
Depreciation	74,000	96,500	$ 97,200
Impairment of fixed assets	10,468	$ 33,697
Total Well Site Services | Drilling Services
Segment Reporting Information [Line Items]
Number of rigs		9		34
Number of rigs to be disposed of | rig		25
Impairment of long-lived assets to be disposed of		$ 25,500
Impairment of long-lived assets held-for-use		8,200
Impairment of fixed assets	5,200	$ 33,700
Total Well Site Services | Completion Services
Segment Reporting Information [Line Items]
Impairment of fixed assets	3,600
Offshore/Manufactured Products
Segment Reporting Information [Line Items]
Gain on insurance settlement			$ 3,800
Downhole Technologies | Drilling Services
Segment Reporting Information [Line Items]
Impairment of fixed assets	$ 1,600
United States | Accounts Receivable | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	63.00%
United Kingdom | Accounts Receivable | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	21.00%

Details of Selected Balance S_6

Details of Selected Balance Sheet Accounts - Inventories (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Details of Selected Balance Sheet Accounts [Abstract]
Finished goods and purchased products		$ 88,634	$ 107,691
Work in process		27,063	21,963
Raw materials		95,410	110,719
Total inventories		211,107	240,373
Allowance for excess or obsolete inventory		(40,731)	(19,031)
Inventories, net		170,376	221,342
Impairments of inventories	$ 25,200	$ 31,151	$ 0	$ 0

Details of Selected Balance S_7

Details of Selected Balance Sheet Accounts - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,174,362	$ 1,224,308
Accumulated depreciation	(790,800)	(764,584)
Property, plant and equipment, net	383,562	459,724
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	34,968	37,507
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 267,072	273,384
Buildings and leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in years)	1 year
Buildings and leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in years)	40 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 239,986	246,826
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in years)	2 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in years)	28 years
Completion Services equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 507,755	510,737
Completion Services equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in years)	2 years
Completion Services equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in years)	10 years
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 35,767	45,309
Office furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in years)	1 year
Office furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in years)	10 years
Vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 81,607	97,264
Vehicles | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in years)	3 years
Vehicles | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in years)	10 years
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 7,207	$ 13,281

Details of Selected Balance S_8

Details of Selected Balance Sheet Accounts - Other Noncurrent Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Details of Selected Balance Sheet Accounts [Abstract]
Deferred compensation plan	$ 22,801	$ 22,268
Deferred income taxes	1,280	685
Other	5,646	5,748
Other noncurrent assets	$ 29,727	$ 28,701

Details of Selected Balance S_9

Details of Selected Balance Sheet Accounts - Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Details of Selected Balance Sheet Accounts [Abstract]
Accrued compensation	$ 18,463	$ 27,428
Insurance liabilities	7,694	9,108
Accrued taxes, other than income taxes	7,307	3,424
Accrued interest	2,202	2,387
Accrued commissions	1,416	1,481
Other	7,422	5,012
Accrued Liabilities	$ 44,504	$ 48,840

Business Acquisitions (Details)

Business Acquisitions (Details) - USD ($) shares in Thousands	Feb. 28, 2018	Jan. 12, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Payments to acquire business			$ 0	$ 0	$ 379,676,000
Reduced carrying amount			183,537,000	248,169,000
Acquisition and merger related expenses					3,600,000
Transaction costs			468,383,000	231,808,000	$ 19,105,000
Promissory note
Business Acquisition [Line Items]
Debt instrument, face amount		$ 25,000,000
Stated interest rate		2.50%
Reduced carrying amount			$ 17,095,000	$ 25,000,000
GEODynamics, Inc.
Business Acquisition [Line Items]
Payments to acquire business		$ 295,400,000
Stock issued in acquisition (in shares)		8,660
Consideration transferred, equity interest issued		$ 294,900,000
Falcon
Business Acquisition [Line Items]
Total consideration	$ 84,200,000

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Changes in the Carrying Value of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Goodwill		$ 764,601	$ 764,840	$ 764,601	$ 764,313
Accumulated impairment losses		(282,295)	(688,351)	(282,295)	(117,295)
Goodwill, net, beginning	$ 482,306	647,000	482,306	647,018
Goodwill impairment (December 2019)	(406,100)	(165,000)	(406,056)	(165,000)	0
Foreign currency translation			239	288
Goodwill, net, ending	406,100	482,306	76,489	482,306	647,018
Total Well Site Services
Goodwill [Roll Forward]
Goodwill		244,349	244,349	244,349	244,349
Accumulated impairment losses		(117,295)	(244,349)	(117,295)	(117,295)
Goodwill, net, beginning	127,054		127,054	127,054
Goodwill impairment (December 2019)			(127,054)	0
Foreign currency translation			0	0
Goodwill, net, ending		127,054	0	127,054	127,054
Total Well Site Services | Completion Services
Goodwill [Roll Forward]
Goodwill		221,582	221,582	221,582	221,582
Accumulated impairment losses		(94,528)	(221,582)	(94,528)	(94,528)
Goodwill, net, beginning	127,054		127,054	127,054
Goodwill impairment (December 2019)			(127,054)	0
Foreign currency translation			0	0
Goodwill, net, ending		127,054	0	127,054	127,054
Total Well Site Services | Drilling Services
Goodwill [Roll Forward]
Goodwill		22,767	22,767	22,767	22,767
Accumulated impairment losses		(22,767)	(22,767)	(22,767)	(22,767)
Goodwill, net, beginning	0		0	0
Goodwill impairment (December 2019)			0	0
Foreign currency translation			0	0
Goodwill, net, ending		0	0	0	0
Downhole Technologies
Goodwill [Roll Forward]
Goodwill		357,502	357,502	357,502	357,502
Accumulated impairment losses		(165,000)	(357,502)	(165,000)	0
Goodwill, net, beginning	192,502		192,502	357,502
Goodwill impairment (December 2019)		(165,000)	(192,502)	(165,000)
Foreign currency translation			0	0
Goodwill, net, ending		192,502	0	192,502	357,502
Offshore / Manufactured Products
Goodwill [Roll Forward]
Goodwill		162,750	162,989	162,750	162,462
Accumulated impairment losses		0	(86,500)	0	0
Goodwill, net, beginning	$ 162,750		162,750	162,462
Goodwill impairment (December 2019)			(86,500)	0
Foreign currency translation			239	288
Goodwill, net, ending		$ 162,750	$ 76,489	$ 162,750	$ 162,462

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)reporting_unit	Dec. 31, 2020USD ($)reporting_unit	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 01, 2020USD ($)
Goodwill [Line Items]
Number of reporting units with goodwill | reporting_unit			3	1
Goodwill	$ 406,100	$ 482,306	$ 647,000	$ 76,489	$ 482,306	$ 647,018	$ 76,000
Impairments of goodwill	$ 406,100	165,000		$ 406,056	$ 165,000	0
Reporting unit, percentage increase in discount rate	0.50%			1.00%	0.50%
Goodwill impairment loss, increase in charge due to increase in discount rate	$ 10,000				$ 28,000
Amortization				$ 24,900	$ 26,800	26,300
Useful life				12 years 4 months 24 days	12 years 10 months 24 days
Amortization expense, next twelve months				$ 20,600
Amortization expense, year two				19,800
Amortization expense, year three				16,800
Amortization expense, year four				16,700
Amortization expense, year five				16,600
Minimum
Goodwill [Line Items]
Reporting unit, discount rate	16.80%				12.50%
Maximum
Goodwill [Line Items]
Reporting unit, discount rate	18.50%				13.00%
Downhole Technologies
Goodwill [Line Items]
Goodwill		192,502		0	$ 192,502	357,502
Impairments of goodwill		165,000		192,502	165,000
Total Well Site Services
Goodwill [Line Items]
Goodwill		127,054		0	127,054	127,054
Impairments of goodwill				127,054	0
Total Well Site Services | Completion Services
Goodwill [Line Items]
Goodwill		127,054		0	127,054	127,054
Impairments of goodwill				127,054	0
Offshore / Manufactured Products
Goodwill [Line Items]
Goodwill		$ 162,750		76,489	162,750	$ 162,462
Impairments of goodwill				$ 86,500	$ 0
Reporting unit, discount rate				15.00%

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 313,960	$ 325,030
Accumulated Amortization	108,211	94,939
Net Carrying Amount	205,749	230,091
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	168,288	168,278
Accumulated Amortization	55,380	44,296
Net Carrying Amount	112,908	123,982
Patents/Technology/Know-how
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	75,920	85,919
Accumulated Amortization	26,124	30,791
Net Carrying Amount	49,796	55,128
Noncompete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,044	17,125
Accumulated Amortization	14,742	11,061
Net Carrying Amount	1,302	6,064
Tradenames and other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	53,708	53,708
Accumulated Amortization	11,965	8,791
Net Carrying Amount	$ 41,743	$ 44,917

Long-term Debt - Summary of Lon

Long-term Debt - Summary of Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 12, 2018
Debt Instrument [Line Items]
Net carrying amount of the liability component	$ 183,537	$ 248,169
Less: Current portion	(17,778)	(25,617)
Total long-term debt	165,759	222,552
Debt issuance costs	$ 600	$ 1,400
1.5% Convertible Unsecured Senior Notes
Debt Instrument [Line Items]
Stated interest rate	1.50%	1.50%	1.50%
Convertible Debt
Debt Instrument [Line Items]
Net carrying amount of the liability component	$ 143,242	$ 167,594
Convertible Debt | 1.5% Convertible Unsecured Senior Notes
Debt Instrument [Line Items]
Net carrying amount of the liability component	143,242	167,594
Debt issuance costs	$ 1,819	3,112
Stated interest rate	1.50%		1.50%
Long-term debt, gross	$ 157,369	192,250
Promissory note
Debt Instrument [Line Items]
Net carrying amount of the liability component	17,095	25,000
Stated interest rate				2.50%
Other debt and finance lease obligations
Debt Instrument [Line Items]
Net carrying amount of the liability component	4,792	5,041
Revolving Credit Facility
Debt Instrument [Line Items]
Net carrying amount of the liability component	$ 18,408	$ 50,534

Long-term Debt - Long-term Debt

Long-term Debt - Long-term Debt Maturities Schedule (Details) $ in Thousands	Dec. 31, 2020USD ($)
Debt Disclosure [Abstract]
2021	$ 17,778
2022	19,126
2023	143,744
2024	485
2025	512
Thereafter	1,892
Total debt	$ 183,537

Long-term Debt - Narrative (Det

Long-term Debt - Narrative (Details)	Feb. 10, 2021USD ($)	Jun. 17, 2020USD ($)	Jan. 30, 2018USD ($)day$ / shares	Jan. 12, 2018USD ($)	Jun. 16, 2020	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Jan. 01, 2021USD ($)
Debt Instrument [Line Items]
Outstanding letters of credit						$ 29,200,000
Repayments of convertible debt						20,078,000	$ 6,724,000	$ 0
Gain on extinguishment of debt						$ 10,721,000	$ 0	$ 0
1.5% Convertible Unsecured Senior Notes
Debt Instrument [Line Items]
Stated interest rate						1.50%	1.50%	1.50%
Convertible Debt | 1.5% Convertible Unsecured Senior Notes
Debt Instrument [Line Items]
Stated interest rate						1.50%		1.50%
Debt instrument, face amount			$ 200,000,000
Proceeds from issuance of debt			$ 194,000,000
Debt instrument, repurchased amount						$ 34,900,000
Repayments of convertible debt						20,100,000	$ 6,700,000
Debt instrument, liability component repurchased						30,800,000
Gain on extinguishment of debt						10,700,000
Debt instrument liability, component repurchased							7,800,000
Effective interest rate percentage			6.00%
Interest expense, debt						9,300,000	10,200,000	$ 9,000,000
Cash interest expense						2,600,000	$ 3,000,000	$ 2,800,000
Debt instrument, convertible, conversion ratio			0.0222748
Debt instrument, convertible, conversion price (in dollars per share) | $ / shares			$ 44.89
Percentage of stock price trigger			130.00%
Convertible threshold, trading days | day			20
Convertible threshold, consecutive trading days | day			30
Threshold consecutive trading days, sale price per share | day			5
Measurement period | day			5
Debt instrument, threshold percentage of sales price per share			98.00%
Amount of indebtedness in event of default			$ 40,000,000
Promissory note
Debt Instrument [Line Items]
Stated interest rate				2.50%
Debt instrument, face amount				$ 25,000,000
Settlement costs and expenses				$ 7,900,000
Subsequent Event | Convertible Debt | 1.5% Convertible Unsecured Senior Notes
Debt Instrument [Line Items]
Effective interest rate percentage									2.00%
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 200,000,000	350,000,000
Unused capacity, commitment fee percentage		0.50%
Covenant suspension period, borrowing availability		85.00%
Consolidated net book value of eligible receivables		70.00%
Consolidated net book value of eligible inventory		20.00%
Long-term line of credit						19,000,000
Unamortized debt issuance costs						$ 500,000
Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Unused capacity, commitment fee percentage					0.25%
Revolving Credit Facility | Minimum | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		2.50%			1.75%
Revolving Credit Facility | Minimum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate		1.50%			0.75%
Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Unused capacity, commitment fee percentage					0.50%
Revolving Credit Facility | Maximum | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		3.75%			3.00%
Revolving Credit Facility | Maximum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate		2.75%			2.00%
Revolving Credit Facility | Subsequent Event
Debt Instrument [Line Items]
Remaining borrowing capacity									$ 69,300,000
Revolving Credit Facility | Subsequent Event | Asset-based Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 125,000,000
Debt instrument, springing maturity, term	91 days
Debt instrument, amount of indebtedness subject to springing maturity	$ 17,500,000
Debt instrument, covenant, minimum fixed charge coverage ratio	1
Debt instrument, percentage of borrowing base outstanding subject to covenant	15.00%
Debt instrument, amount of borrowing base outstanding subject to covenant	$ 14,100,000
Revolving Credit Facility | Subsequent Event | Base Rate | Asset-based Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Revolving Credit Facility | Subsequent Event | Minimum | Asset-based Revolving Credit Facility
Debt Instrument [Line Items]
Unused capacity, commitment fee percentage	0.375%
Revolving Credit Facility | Subsequent Event | Minimum | LIBOR | Asset-based Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	2.75%
Revolving Credit Facility | Subsequent Event | Minimum | Base Rate | Asset-based Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%
Revolving Credit Facility | Subsequent Event | Maximum | Asset-based Revolving Credit Facility
Debt Instrument [Line Items]
Unused capacity, commitment fee percentage	0.50%
Revolving Credit Facility | Subsequent Event | Maximum | LIBOR | Asset-based Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	3.25%
Revolving Credit Facility | Subsequent Event | Maximum | Base Rate | Asset-based Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 50,000,000
Letter of Credit | Subsequent Event | Asset-based Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 50,000,000

Long-term Debt - Carrying Amoun

Long-term Debt - Carrying Amount of the 1.50% Notes (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Less: Unamortized issuance costs	$ 600	$ 1,400
Net carrying amount of the liability component	183,537	248,169
Convertible Debt
Debt Instrument [Line Items]
Net carrying amount of the liability component	143,242	167,594
Convertible Debt | 1.5% Convertible Unsecured Senior Notes
Debt Instrument [Line Items]
Principal amount of the liability component	157,369	192,250
Less: Unamortized discount	12,308	21,544
Less: Unamortized issuance costs	1,819	3,112
Net carrying amount of the liability component	143,242	167,594
Net carrying amount of the equity component	$ 25,683	$ 25,683

Operating Leases - Operating Le

Operating Leases - Operating Lease Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease assets, net	$ 33,140	$ 43,616

Operating Leases - Non-cash Imp

Operating Leases - Non-cash Impact Of Operating Lease Additions (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Right-of-use asset obtained in exchange for operating lease liability		$ 1,900	$ 53,700
Impairments of fixed and lease assets		12,447	$ 33,697	$ 0
Impairment of operating lease assets		1,979
Downhole Technologies
Lessee, Lease, Description [Line Items]
Impairments of fixed and lease assets		3,600
Impairment of operating lease assets		$ 2,000
Cumulative Effect, Period of Adoption, Adjustment
Lessee, Lease, Description [Line Items]
Right-of-use asset obtained in exchange for operating lease liability	$ 47,700

Operating Leases - Narrative (D

Operating Leases - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Total operating lease expense	$ 16,588	$ 17,878	$ 14,900

Operating Leases - Operating _2

Operating Leases - Operating Lease Expense Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating lease expense components:
Leases with initial term of greater than 12 months	$ 12,564	$ 11,972
Leases with initial term of 12 months or less	4,024	5,906
Total operating lease expense	$ 16,588	$ 17,878	$ 14,900

Operating Leases - Maturity Lea

Operating Leases - Maturity Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Operating Leases
2021	$ 9,293
2022	6,534
2023	5,204
2024	4,562
2025	4,461
Thereafter	13,787
Total lease payments	43,841
Less: Imputed interest	(7,055)
Present value of operating lease liabilities	36,786
Less: Current portion	(7,620)	$ (8,311)
Total long-term operating lease liabilities	$ 29,166	$ 35,777
Weighted-average remaining lease term (years)	6 years 9 months 18 days
Weighted-average discount rate	5.00%

Income Taxes - Consolidated Pre

Income Taxes - Consolidated Pre-tax Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
United States	$ (534,452)	$ (254,291)	$ (29,424)
Foreign	123	13,564	7,692
Loss before income taxes	$ (534,329)	$ (240,727)	$ (21,732)

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Impairments of goodwill	$ 406,100,000	$ 165,000,000	$ 406,056,000	$ 165,000,000	$ 0
Impairments of fixed and lease assets			12,447,000	33,697,000	0
Nondeductible goodwill impairment loss			313,100,000	165,000,000
Income tax expense (benefit) from carryback of operating losses			(16,400,000)
Proceeds from CARES Act carryback claims			41,300,000
Tax benefit related to the remeasurement of net deferred tax liabilities					$ 5,800,000
Valuation allowance		35,828,000	35,497,000	35,828,000
Foreign tax credit carryforwards		20,360,000	20,870,000	20,360,000
Foreign tax credit carryforward, valuation allowance		20,400,000	17,100,000	20,400,000
Unrecognized tax benefits		0	0	0
Income tax penalties and interest accrued		0	0	0
Net Operating Loss Carryforward
Operating Loss Carryforwards [Line Items]
Valuation allowance		15,500,000	18,400,000	15,500,000
Domestic Tax Authority | Internal Revenue Service (IRS)
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards			74,600,000
Domestic Tax Authority | Internal Revenue Service (IRS) | GEODynamics, Inc.
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards			37,600,000
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards			171,800,000
State and Local Jurisdiction | GEODynamics, Inc.
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards			13,900,000
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards			35,000,000
Operating loss carryforwards without expiration			14,100,000
Downhole Technologies
Operating Loss Carryforwards [Line Items]
Impairments of goodwill		165,000,000	192,502,000	165,000,000
Impairments of fixed and lease assets			3,600,000
Downhole Technologies | Operating Segments
Operating Loss Carryforwards [Line Items]
Impairments of goodwill	$ 406,100,000	$ 165,000,000	$ 192,502,000	$ 165,000,000

Income Taxes - Components of In

Income Taxes - Components of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
United States	$ (44,399)	$ 300	$ (5,549)
U.S. state	235	292	1,534
Foreign	2,622	5,958	4,877
Current, Total	(41,542)	6,550	862
Deferred:
United States	(20,913)	(13,972)	(2,592)
U.S. state	(1,798)	(473)	(95)
Foreign	(1,693)	(1,024)	(802)
Deferred, Total	(24,404)	(15,469)	(3,489)
Total income tax benefit	$ (65,946)	$ (8,919)	$ (2,627)

Income Taxes - Income Tax Rate

Income Taxes - Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
U.S. statutory tax benefit rate	(21.00%)	(21.00%)	(21.00%)
Impairments of goodwill	12.30%	14.40%	0.00%
Effect of CARES Act	(0.031)	0	0
Effect of Tax Reform Legislation	0	0	(0.261)
Valuation allowance against tax assets	0.30%	0.80%	14.00%
Non-deductible compensation	0.10%	0.30%	5.70%
Other non-deductible expenses	0.10%	0.20%	12.60%
Effect of foreign income taxed at different rates	0.10%	0.70%	0.50%
State income taxes, net of federal benefits	(1.10%)	(0.40%)	(0.30%)
Other, net	0.00%	1.30%	2.50%
Effective tax benefit rate	(12.30%)	(3.70%)	(12.10%)

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Foreign tax credit carryforwards	$ 20,870	$ 20,360
Net operating loss carryforwards	37,838	54,772
Employee benefits	7,353	10,778
Inventory	9,696	7,725
Operating lease liabilities	6,697	8,171
Other	7,649	4,562
Gross deferred tax asset	90,103	106,368
Valuation allowance	(35,497)	(35,828)
Net deferred tax asset	54,606	70,540
Deferred tax liabilities:
Tax over book depreciation	(27,613)	(36,387)
Intangible assets	(30,392)	(56,867)
Convertible senior notes discount	(2,790)	(4,964)
Operating lease assets	(5,884)	(8,047)
Other	(910)	(1,669)
Deferred tax liability	(67,589)	(107,934)
Net deferred tax liability	$ (12,983)	$ (37,394)

Income Taxes - Deferred Tax Rec

Income Taxes - Deferred Tax Reclassifications (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Other non-current assets	$ 1,280	$ 685
Deferred tax liability	(14,263)	(38,079)
Net deferred tax liability	$ (12,983)	$ (37,394)

Stockholders' Equity - Narrativ

Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Equity [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	25,000,000	25,000,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Stock repurchased during period (in shares)	0
Stock repurchased during period, value		$ 51
Stock repurchase program, remaining authorized repurchase amount		$ 800

Stockholders' Equity - Changes

Stockholders' Equity - Changes in Common Stock Issued and Outstanding (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Changes in Common Stock Outstanding [Roll Forward]
Common stock, shares issued (in shares)	72,546,321	71,754,000
Treasury stock, common, (in shares)	12,045,000	11,784,000
Common stock, shares outstanding (in shares)	60,501,000	59,970,000
Restricted stock awards, net of forfeitures (in shares)	743,000	792,000
Shares withheld for taxes on vesting of restricted stock awards (in shares)	(239,000)	(210,000)
Purchase of treasury stock (in shares)		(51,000)
Common stock, shares issued (in shares)	73,288,976	72,546,321
Treasury stock, common, (in shares)	12,284,000	12,045,000
Common stock, shares outstanding (in shares)	61,005,000	60,501,000

Stockholders' Equity - Accumula

Stockholders' Equity - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss)	$ (71,385)	$ (67,746)
Currency translation adjustments, net of tax	$ (3,600)	$ 3,700
United Kingdom
Accumulated Other Comprehensive Income (Loss) [Line Items]
Exchange rate, strengthened (weakened)	3.00%	4.00%
BRAZIL
Accumulated Other Comprehensive Income (Loss) [Line Items]
Exchange rate, strengthened (weakened)	(23.00%)	(4.00%)

Net Loss Per Share - Schedule o

Net Loss Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Numerators:
Net loss	$ (18,747)	$ (19,969)	$ (24,626)	$ (405,041)	$ (175,552)	$ (31,868)	$ (9,740)	$ (14,648)	$ (468,383)	$ (231,808)	$ (19,105)
Less: Income attributable to unvested restricted stock awards									0	0	0
Numerator for basic net loss per share									(468,383)	(231,808)	(19,105)
Effect of dilutive securities:
Unvested restricted stock awards									0	0	0
Numerator for diluted net loss per share									$ (468,383)	$ (231,808)	$ (19,105)
Denominators:
Weighted average number of common shares outstanding (in shares)									60,953	60,424	59,680
Less: Weighted average number of unvested restricted stock awards outstanding (in shares)									(1,141)	(1,045)	(968)
Denominator for basic and diluted net loss per share (in shares)									59,812	59,379	58,712
Net loss per share:
Basic (in dollars per share)									$ (7.83)	$ (3.90)	$ (0.33)
Diluted (in dollars per share)									$ (7.83)	$ (3.90)	$ (0.33)

Net Loss Per Share - Narrative

Net Loss Per Share - Narrative (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Antidilutive securities	582	659	696
1.5% Convertible Unsecured Senior Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stated interest rate	1.50%	1.50%	1.50%

Long-Term Incentive and Defer_3

Long-Term Incentive and Deferred Compensation Plans - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	$ 8,400,000	$ 16,800,000	$ 22,600,000
Generally measured period	3 years
Number of options exercised (in shares)	0	0	0
Deferred compensation arrangement, recorded liability	$ 2,000,000	$ 1,400,000
Deferred compensation arrangement, requisite performance period	3 years
Deferred compensation plan	$ 22,801,000	22,268,000
Amounts payable to plan participants	22,800,000
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred compensation arrangement, potential maximum liability	0	0
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred compensation arrangement, potential maximum liability	$ 4,000,000	$ 2,700,000
Performance-based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	3 years	3 years	3 years
Additional performance based shares to be issued if current period metrics are achieved, maximum target award percentage	200.00%
Time-based Restricted Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Time-based Restricted Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options, vested, fair value	$ 14,500,000	$ 18,200,000	$ 19,400,000
Compensation costs not yet recognized	$ 8,600,000
Compensation costs not yet recognized, period for recognition	1 year 6 months
Stock Options And Restricted Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for future grant	1,000,000

Long-Term Incentive and Defer_4

Long-Term Incentive and Deferred Compensation Plans - Restricted Stock Awards and Related Information (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2020$ / sharesshares
Service-based Restricted Stock
Number of Shares
Unvested, beginning balance (in shares)	1,064
Granted (in shares)	687
Performance adjustment (in shares)	0
Vested (in shares)	(595)
Forfeited (in shares)	(69)
Unvested, ending balance (in shares)	1,087
Weighted Average Grant Date Fair Value
Unvested, beginning balance, weighted average grant date fair value (in dollars per share) | $ / shares	$ 22.84
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	10.01
Performance adjustment, weighted average grant date fair value (in dollars per share) | $ / shares	0
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	24.44
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	19.42
Unvested, ending balance, weighted average grant date fair value (in dollars per share) | $ / shares	$ 14.07
Performance-based Restricted Stock
Number of Shares
Unvested, beginning balance (in shares)	248
Granted (in shares)	180
Performance adjustment (in shares)	23
Vested (in shares)	(125)
Forfeited (in shares)	(17)
Unvested, ending balance (in shares)	310
Weighted Average Grant Date Fair Value
Unvested, beginning balance, weighted average grant date fair value (in dollars per share) | $ / shares
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	11.15
Performance adjustment, weighted average grant date fair value (in dollars per share) | $ / shares
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	62.66
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	11.15
Unvested, ending balance, weighted average grant date fair value (in dollars per share) | $ / shares
Restricted Stock
Number of Shares
Unvested, beginning balance (in shares)	1,312
Granted (in shares)	867
Performance adjustment (in shares)	23
Vested (in shares)	(720)
Forfeited (in shares)	(85)
Unvested, ending balance (in shares)	1,397

Long-Term Incentive and Defer_5

Long-Term Incentive and Deferred Compensation Plans - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding Options at December 31, 2019 (in shares)	636
Forfeited/Expired (in shares)	(105)
Outstanding Options at December 31, 2020 (in shares)	530	636
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding Options at December 31, 2019 (in dollars per share)	$ 48.81
Forfeited/Expired (in dollars per share)	49.52
Outstanding Options at December 31, 2020 (in dollars per share)	$ 48.67	$ 48.81
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding options, weighted average remaining contractual life	2 years 3 months 18 days	3 years
Outstanding options, aggregate intrinsic value	$ 0	$ 0
Options, exercise price range, lower limit (in dollars per share)	$ 41.60
Options, exercise price range, upper limit (in dollars per share)	$ 58.54

Retirement Plans (Details)

Retirement Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Defined contribution plan expense	$ 3.4	$ 9.5	$ 8.6

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($)	1 Months Ended	12 Months Ended
	Aug. 31, 2020	Dec. 31, 2020	Jan. 12, 2018
Loss Contingencies [Line Items]
Payments for settlements		$ 7,300,000
Income tax carryback claims	$ 19,000,000
Promissory note
Loss Contingencies [Line Items]
Debt instrument, face amount			$ 25,000,000

Segments and Related Informat_3

Segments and Related Information - Financial Information by Business Segment (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020USD ($)	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)service	Sep. 30, 2019USD ($)rig	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)service	Dec. 31, 2018USD ($)
Segment Reporting Information [Line Items]
Revenues	$ 137,377	$ 134,759	$ 146,245	$ 219,694	$ 238,361	$ 263,697	$ 264,685	$ 250,611	$ 638,075	$ 1,017,354	$ 1,088,133
Depreciation and amortization expense									98,543	123,319	123,530
Operating income (loss)									(534,340)	(228,180)	(5,876)
Capital expenditures									12,749	56,116	88,024
Total assets	1,152,260				1,727,867				1,152,260	1,727,867	2,003,821
Impairments of inventories				25,200					31,151	0	0
Impairments of goodwill				406,100	165,000				406,056	165,000	0
Impairment of fixed assets									10,468	33,697
Impairments of fixed and lease assets									12,447	33,697	0
Corporate
Segment Reporting Information [Line Items]
Revenues									0	0	0
Depreciation and amortization expense									773	817	905
Operating income (loss)									(35,744)	(45,154)	(54,485)
Capital expenditures									(331)	1,146	1,046
Total assets	79,270				42,905				79,270	42,905	40,766
Impairments of inventories									0
Impairments of goodwill									0	0
Impairment of fixed assets									0	0
Total Well Site Services
Segment Reporting Information [Line Items]
Revenues									199,839	432,094	480,254
Impairments of goodwill									127,054	0
Total Well Site Services | Operating Segments
Segment Reporting Information [Line Items]
Revenues									199,839	432,094	480,254
Depreciation and amortization expense									53,240	78,413	80,769
Operating income (loss)									(193,388)	(55,040)	(17,010)
Capital expenditures									6,937	33,470	57,014
Total assets	244,932				478,249				244,932	478,249	587,896
Total Well Site Services | Completion Services
Segment Reporting Information [Line Items]
Impairments of inventories									9,000
Impairments of goodwill									127,054	0
Impairment of fixed assets									3,600
Total Well Site Services | Completion Services | Operating Segments
Segment Reporting Information [Line Items]
Revenues									191,529	390,748	411,019
Depreciation and amortization expense									52,922	68,440	66,415
Operating income (loss)									(187,869)	(11,621)	(7,647)
Capital expenditures									6,823	30,806	50,423
Total assets	241,038				$ 459,078				241,038	459,078	523,235
Impairments of inventories									8,981
Impairments of goodwill									127,054	0
Impairment of fixed assets									3,647	0
Total Well Site Services | Drilling Services
Segment Reporting Information [Line Items]
Impairments of goodwill									0	0
Impairment of fixed assets									5,200	$ 33,700
Number of rigs					9	34				9
Total Well Site Services | Drilling Services | Operating Segments
Segment Reporting Information [Line Items]
Revenues									8,310	$ 41,346	69,235
Depreciation and amortization expense									318	9,973	14,354
Operating income (loss)									(5,519)	(43,419)	(9,363)
Capital expenditures									114	2,664	6,591
Total assets	3,894				$ 19,171				3,894	19,171	64,661
Impairments of inventories		$ 5,900							0
Impairments of goodwill									0	0
Impairment of fixed assets			$ 3,000	5,200		$ 33,700			5,198	33,697
Impairments of fixed and lease assets	4,300
Downhole Technologies
Segment Reporting Information [Line Items]
Revenues									97,936	182,314	213,813
Impairments of inventories									5,900
Impairments of goodwill					165,000				192,502	165,000
Impairments of fixed and lease assets									3,600
Downhole Technologies | Operating Segments
Segment Reporting Information [Line Items]
Revenues									97,936	182,314	213,813
Depreciation and amortization expense									22,649	21,247	18,649
Operating income (loss)									(224,414)	(164,008)	26,705
Capital expenditures									3,230	13,808	16,167
Total assets	280,096				529,677				280,096	529,677	691,874
Impairments of inventories									5,921
Impairments of goodwill				$ 406,100	165,000				192,502	165,000
Impairment of fixed assets									1,623	0
Downhole Technologies | Drilling Services
Segment Reporting Information [Line Items]
Impairment of fixed assets									1,600
Offshore/Manufactured Products
Segment Reporting Information [Line Items]
Revenues									340,300	402,946	394,066
Impairments of inventories									16,200
Offshore/Manufactured Products | Operating Segments
Segment Reporting Information [Line Items]
Revenues									340,300	402,946	394,066
Depreciation and amortization expense									21,881	22,842	23,207
Operating income (loss)									(80,794)	36,022	38,914
Capital expenditures									2,913	7,692	13,797
Total assets	$ 547,962				$ 677,036				547,962	677,036	$ 683,285
Impairments of inventories									16,249
Impairments of goodwill									86,500	0
Impairment of fixed assets									$ 0	$ 0

Segments and Related Informat_4

Segments and Related Information - Narrative (Details)	12 Months Ended
	Dec. 31, 2018
One Customer | Customer Concentration Risk | Revenue from Contract with Customer Benchmark
Revenue, Major Customer [Line Items]
Concentration risk, percentage	10.00%

Segments and Related Informat_5

Segments and Related Information Segments and Related Information - Supplemental Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue from External Customer [Line Items]
Revenue from contract with customer	$ 137,377	$ 134,759	$ 146,245	$ 219,694	$ 238,361	$ 263,697	$ 264,685	$ 250,611	$ 638,075	$ 1,017,354	$ 1,088,133
Total Well Site Services
Revenue from External Customer [Line Items]
Revenue from contract with customer									199,839	432,094	480,254
Total Well Site Services | Project-driven products
Revenue from External Customer [Line Items]
Revenue from contract with customer									0	0	0
Total Well Site Services | Short-cycle:
Revenue from External Customer [Line Items]
Revenue from contract with customer									199,839	432,094	480,254
Total Well Site Services | Completion products and services
Revenue from External Customer [Line Items]
Revenue from contract with customer									191,529	390,748	411,019
Total Well Site Services | Drilling services
Revenue from External Customer [Line Items]
Revenue from contract with customer									8,310	41,346	69,235
Total Well Site Services | Other products
Revenue from External Customer [Line Items]
Revenue from contract with customer									0	0	0
Total Well Site Services | Other products and services
Revenue from External Customer [Line Items]
Revenue from contract with customer									0	0	0
Downhole Technologies
Revenue from External Customer [Line Items]
Revenue from contract with customer									97,936	182,314	213,813
Downhole Technologies | Project-driven products
Revenue from External Customer [Line Items]
Revenue from contract with customer									0	0	0
Downhole Technologies | Short-cycle:
Revenue from External Customer [Line Items]
Revenue from contract with customer									97,936	182,314	213,813
Downhole Technologies | Completion products and services
Revenue from External Customer [Line Items]
Revenue from contract with customer									97,936	182,314	213,813
Downhole Technologies | Drilling services
Revenue from External Customer [Line Items]
Revenue from contract with customer									0	0	0
Downhole Technologies | Other products
Revenue from External Customer [Line Items]
Revenue from contract with customer									0	0	0
Downhole Technologies | Other products and services
Revenue from External Customer [Line Items]
Revenue from contract with customer									0	0	0
Offshore/Manufactured Products
Revenue from External Customer [Line Items]
Revenue from contract with customer									340,300	402,946	394,066
Offshore/Manufactured Products | Project-driven products
Revenue from External Customer [Line Items]
Revenue from contract with customer									165,497	159,205	120,894
Offshore/Manufactured Products | Short-cycle:
Revenue from External Customer [Line Items]
Revenue from contract with customer									48,142	123,222	144,367
Offshore/Manufactured Products | Completion products and services
Revenue from External Customer [Line Items]
Revenue from contract with customer									26,148	95,806	116,383
Offshore/Manufactured Products | Drilling services
Revenue from External Customer [Line Items]
Revenue from contract with customer									0	0	0
Offshore/Manufactured Products | Other products
Revenue from External Customer [Line Items]
Revenue from contract with customer									21,994	27,416	27,984
Offshore/Manufactured Products | Other products and services
Revenue from External Customer [Line Items]
Revenue from contract with customer									$ 126,661	$ 120,519	$ 128,805

Segments and Related Informat_6

Segments and Related Information - Financial Information by Geographic Segment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenues from unaffiliated customers	$ 137,377	$ 134,759	$ 146,245	$ 219,694	$ 238,361	$ 263,697	$ 264,685	$ 250,611	$ 638,075	$ 1,017,354	$ 1,088,133
Long-lived assets	698,940				1,215,737				698,940	1,215,737	1,442,746
United States
Segment Reporting Information [Line Items]
Revenues from unaffiliated customers									463,382	831,317	930,151
Long-lived assets	554,926				1,046,250				554,926	1,046,250	1,278,504
United Kingdom
Segment Reporting Information [Line Items]
Revenues from unaffiliated customers									76,808	70,641	64,564
Long-lived assets	78,622				81,855				78,622	81,855	74,394
Singapore
Segment Reporting Information [Line Items]
Revenues from unaffiliated customers									57,513	56,170	37,938
Long-lived assets	16,509				18,260				16,509	18,260	19,116
Other
Segment Reporting Information [Line Items]
Revenues from unaffiliated customers									40,372	59,226	55,480
Long-lived assets	$ 48,883				$ 69,372				$ 48,883	$ 69,372	$ 70,732

Related Party Transactions (Det

Related Party Transactions (Details) - Affiliated Entity - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Revenue from related parties		$ 1,800	$ 1,400
Related party transaction, purchases from related party			1,300
Leased Assets Purchased
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction	$ 5,400
Rent Expense
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction		$ 44	$ 157	$ 330

Valuation Allowances (Details)

Valuation Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowance for doubtful accounts receivable
Movement in Valuation Allowances [Roll Forward]
Balance at Beginning of Period	$ 8,745	$ 6,701	$ 7,316
Charged to Costs and Expenses	3,409	2,776	1,520
Deductions (net of recoveries)	(5,049)	(819)	(887)
Translation and Other, Net	1,199	87	(1,248)
Balance at End of Period	8,304	8,745	6,701
Allowance for excess or obsolete inventory
Movement in Valuation Allowances [Roll Forward]
Balance at Beginning of Period	19,031	18,551	15,649
Charged to Costs and Expenses	32,974	3,040	2,683
Deductions (net of recoveries)	(11,719)	(2,644)	(2,917)
Translation and Other, Net	445	84	3,136
Balance at End of Period	40,731	19,031	18,551
Valuation allowance on deferred tax assets
Movement in Valuation Allowances [Roll Forward]
Balance at Beginning of Period	35,828	33,762	37,904
Charged to Costs and Expenses	1,890	2,558	(4,124)
Deductions (net of recoveries)	0	0	0
Translation and Other, Net	(2,221)	(492)	(18)
Balance at End of Period	$ 35,497	$ 35,828	33,762
GEODynamics, Inc. | Allowance for doubtful accounts receivable
Movement in Valuation Allowances [Roll Forward]
Translation and Other, Net			600
GEODynamics, Inc. | Allowance for excess or obsolete inventory
Movement in Valuation Allowances [Roll Forward]
Translation and Other, Net			$ 3,300

Quarterly Financial Informati_3

Quarterly Financial Information (Unaudited) - Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 137,377	$ 134,759	$ 146,245	$ 219,694	$ 238,361	$ 263,697	$ 264,685	$ 250,611	$ 638,075	$ 1,017,354	$ 1,088,133
Gross Profit	(1,159)	(9,885)	(6,301)	(4,156)	16,508	31,431	24,872	19,452
Net loss	$ (18,747)	$ (19,969)	$ (24,626)	$ (405,041)	$ (175,552)	$ (31,868)	$ (9,740)	$ (14,648)	$ (468,383)	$ (231,808)	$ (19,105)
Basic and diluted net loss per share (in dollars per share)	$ (0.31)	$ (0.33)	$ (0.41)	$ (6.79)	$ (2.95)	$ (0.54)	$ (0.16)	$ (0.25)

Quarterly Financial Informati_4

Quarterly Financial Information (Unaudited) - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Impairments of goodwill				$ 406,100	$ 165,000				$ 406,056	$ 165,000	$ 0
Impairment of fixed assets									10,468	33,697
Impairments of inventories				25,200					31,151	0	0
Severance and restructuring charges	$ 2,700	$ 300	$ 5,400	700	600	$ 700	$ 1,300	$ 1,000	9,069	3,502	1,629
Impairments of fixed and lease assets									12,447	33,697	0
Downhole Technologies
Segment Reporting Information [Line Items]
Impairments of goodwill					165,000				192,502	165,000
Impairments of inventories									5,900
Impairments of fixed and lease assets									3,600
Downhole Technologies | Operating Segments
Segment Reporting Information [Line Items]
Impairments of goodwill				406,100	$ 165,000				192,502	165,000
Impairment of fixed assets									1,623	0
Impairments of inventories									5,921
Severance and restructuring charges									2,018	0	0
Downhole Technologies | Drilling Services
Segment Reporting Information [Line Items]
Impairment of fixed assets									1,600
Total Well Site Services
Segment Reporting Information [Line Items]
Impairments of goodwill									127,054	0
Total Well Site Services | Drilling Services
Segment Reporting Information [Line Items]
Impairments of goodwill									0	0
Impairment of fixed assets									5,200	33,700
Total Well Site Services | Drilling Services | Operating Segments
Segment Reporting Information [Line Items]
Impairments of goodwill									0	0
Impairment of fixed assets			$ 3,000	5,200		$ 33,700			5,198	33,697
Impairments of inventories		$ 5,900							0
Severance and restructuring charges									$ 217	$ 0	$ 0
Impairments of fixed and lease assets	$ 4,300
goodwill and fixed assets impairment				$ 411,300