Oceaneering International (OII) 10-Q 29 Oct 21 2021 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	9 Months Ended
	Sep. 30, 2021	Oct. 22, 2021
Document Information [Line Items]
Entity Registrant Name	OCEANEERING INTERNATIONAL INC
Entity Central Index Key	0000073756
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		99,798,705
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	1-10945
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	11911 FM 529
Entity Address, State or Province	TX
Entity Address, City or Town	Houston,
City Area Code	713
Local Phone Number	329-4500
Title of 12(b) Security	Common stock, par value $0.25 per share
Trading Symbol	OII
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Address, Postal Zip Code	77041
Entity Tax Identification Number	95-2628227

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current Assets:
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 447,725	$ 452,016
Accounts receivable, net	293,126	296,214
Contract assets, net	254,672	221,997
Inventory, net	128,869	141,241
Other current assets	60,743	58,795
Total Current Assets	1,185,135	1,170,263
Property and equipment, at cost	2,446,348	2,456,602
Property and equipment, at cost	1,935,620	1,865,495
Net property and equipment	510,728	591,107
Other Assets:
Goodwill	34,936	35,016
Other noncurrent assets	105,402	108,250
Right-of-use operating lease assets	145,771	141,206
Total other assets	286,109	284,472
Total Assets	1,981,972	2,045,842
Current Liabilities:
Accounts payable	97,836	94,207
Accrued liabilities	302,656	292,863
Contract liabilities	50,754	50,046
Total current liabilities	451,246	437,116
Long-term debt	739,980	805,251
Long-term operating lease liabilities	157,510	156,074
Other long-term liabilities	84,139	89,244
Commitments and contingencies
Common Stock, par value (in dollars per share)	$ 0.25	$ 0.25
Common Stock, shares authorized (in shares)	360,000,000	360,000,000
Common Stock, shares issued (in shares)	110,834,088	110,834,088
Equity:
Common stock	$ 27,709	$ 27,709
Additional paid-in capital	$ 170,787	$ 192,492
Treasury stock, shares (in shares)	11,035,383	11,525,725
Treasury stock at cost	$ (631,942)	$ (660,021)
Retained earnings	1,340,726	1,351,220
Accumulated other comprehensive loss	(364,246)	(359,306)
Oceaneering shareholders' equity	543,034	552,094
Noncontrolling interest	6,063	6,063
Total equity	549,097	558,157
Total Liabilities and Equity	1,981,972	2,045,842
Deferred Credits and Other Liabilities, Current	$ 50,323	$ 47,721

Consolidated Statements Of Oper

Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenue	$ 466,814	$ 439,743	$ 1,402,566	$ 1,403,627
Cost of services and products	406,966	410,092	1,217,664	1,284,687
Gross margin	59,848	29,651	184,902	118,940
Selling, general and administrative expense	44,079	49,396	132,531	152,856
Impairment of Intangible Assets, Finite-lived	0	0	0	68,763
Goodwill, impairment loss	0	40,875	0	343,880
Income (loss) from operations	15,769	(60,620)	52,371	(446,559)
Interest income	662	414	1,864	2,202
Interest expense, net of amounts capitalized	(9,616)	(9,250)	(29,752)	(33,323)
Equity in income (losses) of unconsolidated affiliates	189	131	1,101	2,002
Other income (expense), net	(814)	(2,836)	(4,222)	(13,624)
Income (loss) before income taxes	6,190	(72,161)	21,362	(489,302)
Provision (benefit) for income taxes	13,560	7,204	31,856	(17,551)
Net Income (Loss)	$ (7,370)	$ (79,365)	$ (10,494)	$ (471,751)
Weighted-average shares outstanding
Basic (in shares)	99,797	99,297	99,675	99,209
Diluted (in shares)	99,797	99,297	99,675	99,209
Earnings (loss) per share
Basic (in dollars per share)	$ (0.07)	$ (0.80)	$ (0.11)	$ (4.76)
Diluted (in dollars per share)	$ (0.07)	$ (0.80)	$ (0.11)	$ (4.76)

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (7,370)	$ (79,365)	$ (10,494)	$ (471,751)
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	(8,988)	13,204	(5,376)	(46,492)
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax	(249)	0	436	0
Total other comprehensive income (loss)	(9,237)	13,204	(4,940)	(46,492)
Comprehensive income (loss)	$ (16,607)	$ (66,161)	$ (15,434)	$ (518,243)

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash Flows from Operating Activities:
Net income (loss)	$ (10,494)	$ (471,751)
Cost, Depreciation and Amortization	105,937	482,445
Impairment of Intangible Assets, Finite-lived	0	68,763
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization, including goodwill impairment	105,937	482,445
Deferred income tax provision (benefit)	(1,801)	(8,211)
Inventory Write-down		7,038
Net loss (gain) on sales of property and equipment and other	2,318	1,597
Noncash compensation	8,101	6,252
Other Noncash Income (Expense)	(4,636)	(1,838)
Excluding the effects of acquisitions, increase (decrease) in cash from:
Accounts receivable and contract assets	(29,587)	87,999
Inventory	12,371	19,179
Proceeds from sale of debt securities	4,486	0
Other operating assets	(7,624)	(4,639)
Currency translation effect on working capital, excluding cash	(142)	3,256
Current liabilities	14,130	(158,496)
Increase (Decrease) in Other Noncurrent Liabilities	(3,254)	(12,071)
Total adjustments to net income (loss)	95,813	504,114
Net Cash Provided by (Used in) Operating Activities	85,319	32,363
Cash Flows from Investing Activities:
Purchases of property and equipment	(35,816)	(45,840)
Purchase of Angolan bonds	(1,157)	0
Distributions of capital from unconsolidated affiliates	3,108	5,374
Dispositions of property and equipment	4,129	1,752
Net Cash Provided by (Used in) Investing Activities	(22,936)	(38,714)
Cash Flows from Financing Activities:
Payment for Debt Extinguishment or Debt Prepayment Cost	(63,010)
Other financing activities	(1,727)	(1,725)
Net Cash Provided by (Used in) Financing Activities	(64,737)	(1,725)
Effect of exchange rates on cash	(1,937)	(6,802)
Net Increase (Decrease) in Cash and Cash Equivalents	(4,291)	(14,878)
Cash and Cash Equivalents—Beginning of Period	452,016	373,655
Cash and Cash Equivalents—End of Period	$ 447,725	$ 358,777

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Restricted Stock Units (RSUs) [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]Restricted Stock Units (RSUs) [Member]	Additional Paid-in Capital [Member]Restricted Stock [Member]	Treasury Stock [Member]	Treasury Stock [Member]Restricted Stock Units (RSUs) [Member]	Treasury Stock [Member]Restricted Stock [Member]	Retained Earnings [Member]	Retained Earnings [Member]Cumulative Effect, Period of Adoption, Adjustment	Currency Translation Adjustments [Member]	Oceaneering Shareholders' Equity [Member]	Oceaneering Shareholders' Equity [Member]Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interest [Member]
Beginning balance at Dec. 31, 2019	$ 1,075,409		$ 27,709	$ 207,130			$ (681,640)			$ 1,850,244		$ (334,097)	$ 1,069,346		$ 6,063
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of new accounting principle in period of adoption	(2,273)										$ (2,273)			$ (2,273)
Net income (loss)	(367,598)									(367,598)			(367,598)
Other comprehensive income (loss)	(70,325)												(70,325)
Restricted Stock or Unit Expense													1,446
Restricted stock and restricted stock unit activity		$ 1,446
Ending balance at Mar. 31, 2020	636,659		27,709	189,322			(662,386)			1,480,373		(404,422)	630,596		6,063
Beginning balance at Dec. 31, 2019	1,075,409		27,709	207,130			(681,640)			1,850,244		(334,097)	1,069,346		6,063
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(471,751)
Restricted stock and restricted stock unit activity					$ (11,816)	$ (5,992)		$ 13,262	$ 5,992
Ending balance at Sep. 30, 2020	559,419		27,709	190,250			(660,234)			1,376,220		(380,589)	553,356		6,063
Beginning balance at Mar. 31, 2020	636,659		27,709	189,322			(662,386)			1,480,373		(404,422)	630,596		6,063
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(24,788)									(24,788)			(24,788)
Other comprehensive income (loss)	10,629												10,629
Restricted Stock or Unit Expense													2,909
Restricted stock and restricted stock unit activity		2,909				1,790			1,119
Ending balance at Jun. 30, 2020	625,409		27,709	191,112			(661,267)			1,455,585		(393,793)	619,346		6,063
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(79,365)									(79,365)			(79,365)
Other comprehensive income (loss)	13,204												13,204
Restricted Stock or Unit Expense													171
Restricted stock and restricted stock unit activity		171				(862)			1,033
Ending balance at Sep. 30, 2020	559,419		27,709	190,250			(660,234)			1,376,220		(380,589)	553,356		6,063
Beginning balance at Dec. 31, 2020	558,157		27,709	192,492			(660,021)			1,351,220		(359,306)	552,094		6,063
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(9,365)									(9,365)			(9,365)
Other comprehensive income (loss)	(1,802)												(1,802)
Restricted Stock or Unit Expense													1,355
Restricted stock and restricted stock unit activity		1,355			(13,642)	$ (10,439)		14,997	$ 10,439
Ending balance at Mar. 31, 2021	548,345		27,709	168,411			(634,585)			1,341,855		(361,108)	542,282		6,063
Beginning balance at Dec. 31, 2020	558,157		27,709	192,492			(660,021)			1,351,220		(359,306)	552,094		6,063
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(10,494)
Ending balance at Sep. 30, 2021	549,097		27,709	170,787			(631,942)			1,340,726		(364,246)	543,034		6,063
Beginning balance at Mar. 31, 2021	548,345		27,709	168,411			(634,585)			1,341,855		(361,108)	542,282		6,063
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	6,241												6,241
Other comprehensive income (loss)	6,099												6,099
Restricted Stock or Unit Expense													2,047
Restricted stock and restricted stock unit activity		2,047			(409)			2,456
Ending balance at Jun. 30, 2021	562,732		27,709	168,002			(632,129)			1,348,096		(355,009)	556,669		6,063
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(7,370)									(7,370)			(7,370)
Other comprehensive income (loss)	(9,237)												(9,237)
Restricted Stock or Unit Expense													2,972
Restricted stock and restricted stock unit activity		$ 2,972			$ 2,785			$ 187
Ending balance at Sep. 30, 2021	$ 549,097		$ 27,709	$ 170,787			$ (631,942)			$ 1,340,726		$ (364,246)	$ 543,034		$ 6,063

Summary Of Major Accounting Pol

Summary Of Major Accounting Policies	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Summary Of Major Accounting Policies	SUMMARY OF MAJOR ACCOUNTING POLICIES Basis of Presentation . Oceaneering International, Inc. (“Oceaneering,” “we” or “us”) has prepared these unaudited consolidated financial statements pursuant to instructions for quarterly reports on Form 10-Q, which we are required to file with the United States Securities and Exchange Commission (the “SEC”). These financial statements do not include all information and footnotes normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”). These financial statements reflect all adjustments that we believe are necessary to present fairly our financial position as of September 30, 2021 and our results of operations and cash flows for the periods presented. Except as otherwise disclosed herein, all such adjustments are of a normal and recurring nature. These financial statements should be read in conjunction with the consolidated financial statements and related notes included in our annual report on Form 10-K for the year ended December 31, 2020. The results for interim periods are not necessarily indicative of annual results. Principles of Consolidation. The consolidated financial statements include the accounts of Oceaneering and our 50% or more owned and controlled subsidiaries. We also consolidate entities that are determined to be variable interest entities if we determine that we are the primary beneficiary; otherwise, we account for those entities using the equity method of accounting. We use the equity method to account for our investments in unconsolidated affiliated companies of which we own an equity interest of between 20% and 50% and as to which we have significant influence, but not control, over operations. We use the cost method for all other long-term investments. Investments in entities that we do not consolidate are reflected on our balance sheet in other noncurrent assets. We eliminate intercompany transactions and accounts in consolidation. Use of Estimates. The preparation of financial statements in conformity with U.S. GAAP requires that our management make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expense during the reporting period. Actual results could differ from those estimates. Cash and Cash Equivalents. Cash and cash equivalents include demand deposits and highly liquid investments with original maturities of three months or less from the date of investment. Allowances for Credit Loss—Financial Assets Measured at Amortized Costs. We identify allowances for credit loss based on future expected losses when accounts receivable, contract assets or held-to-maturity loan receivables are created rather than when losses are probable. We use the loss-rate method in developing the allowance for credit losses, which involves identifying pools of assets with similar risk characteristics, reviewing historical losses within the last three years and consideration of reasonable supportable forecasts of economic indicators. Changes in estimates, developing trends and other new information could have material effects on future evaluations. We monitor the credit quality of our accounts receivable and other financing receivable amounts by frequent customer interaction, following economic and industry trends and reviewing specific customer data. Our other receivable amounts include contract assets and held-to-maturity loans receivable, which historically we consider to have a low risk of loss. We are monitoring the impacts from the coronavirus (“COVID-19”) pandemic and volatility in the oil and natural gas markets on our customers and various counterparties. We have considered the current and expected economic and market conditions, as a result of COVID-19, in determining credit loss expense for the three- and nine-month periods ended September 30, 2021 and 2020. As of September 30, 2021, our allowance for credit losses was $1.5 million for accounts receivable and $0.8 million for other receivables. Financial assets are written off when deemed uncollectible and there is no reasonable expectation of recovering the contractual cash flows. During the three- and nine-month periods ended September 30, 2021, we wrote off accounts receivable of less than $0.1 million and $3.1 million, respectively, that previously had been reserved. We have elected to apply the practical expedient available under “ Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ,” as amended, (“ASC 326”) to exclude the accrued interest receivable balance that is included in our held-to-maturity loans receivable. The amount excluded as of September 30, 2021 and December 31, 2020 was $1.3 million and $1.5 million, respectively. Accounts receivable are considered to be past-due after the end of the contractual terms agreed to with the customer. There were no material past-due amounts that we consider uncollectible for our financial assets as of September 30, 2021. We generally do not require collateral from our customers. As of September 30, 2021, our accounts receivable included $11 million from one of our customers in our Manufactured Products segment that is a subsidiary of a China-based company that has been and remains subject to well-published financial challenges. See Note 8—”Commitments and Contingencies” for discussion regarding our outstanding accounts receivable from this customer. Inventory . Inventory is valued at the lower of cost or net realizable value. We determine cost using the weighted-average method. We periodically review the value of items in inventory and record write-downs or write-offs of inventory based on our assessment of market conditions. Write-downs and write-offs are charged to cost of services and products. We did not record any write-downs or write-offs of inventory in the three- and nine-month periods ended September 30, 2021, as compared to $7.0 million of write-downs and write-offs in the three- and nine-month periods ended September 30, 2020. Property and Equipment, Long-Lived Intangible Assets and Right-of-Use Operating Lease Assets. We provide for depreciation of property and equipment on the straight-line method over estimated useful lives. We charge the costs of repair and maintenance of property and equipment to operations as incurred, and we capitalize the costs of improvements that extend asset lives or functionality. Upon the disposition of property and equipment, the related cost and accumulated depreciation accounts are relieved, and any resulting gain or loss is included as an adjustment to cost of services and products. We capitalize interest on assets where the construction period is anticipated to be more than three months. We did not capitalize interest in the three- and nine-month periods ended September 30, 2021 and 2020. We do not allocate general administrative costs to capital projects. Long-lived intangible assets, primarily acquired in connection with business combinations, include trade names, intellectual property and customer relationships and are being amortized over their respective estimated useful lives. Our management periodically, and upon the occurrence of a triggering event, reviews the realizability of our property and equipment, long-lived intangible assets and right-of-use operating lease assets to determine whether any events or changes in circumstances indicate that the carrying amounts of the assets may not be recoverable. For long-lived assets to be held and used, we base our evaluation on impairment indicators such as the nature of the assets, the future economic benefits of the assets, any historical or future profitability measurements and other external market conditions or factors that may be present. If such impairment indicators are present or other factors exist that indicate that the carrying amount of an asset may not be recoverable, we determine whether an impairment has occurred through the use of an undiscounted cash flows analysis of the asset at the lowest level for which identifiable cash flows exist. If an impairment has occurred, we recognize a loss for the difference between the carrying amount and the fair value of the asset. For information regarding write-downs and write-offs of property and equipment, long-lived intangible assets and right-of-use operating lease assets in the three- and nine-month periods ended September 30, 2020, see Note 4—“Impairments” and Note 10—“Business Segment Information.” We did not identify indicators of impairment for property and equipment, long-lived intangible assets and right-of-use operating lease assets for the three- and nine-month periods ended September 30, 2021. For assets held for sale or disposal, the fair value of the asset is measured using fair market value less estimated costs to sell. Assets are classified as held for sale when we have a plan for disposal of certain assets and those assets meet the held for sale criteria. For additional information regarding right-of-use operating lease assets, see “ Leases” below. Goodwill. Our goodwill is evaluated for impairment annually and whenever we identify certain triggering events or circumstances that would more likely than not reduce the fair value of a reporting unit below its carrying amount. In our annual evaluation of goodwill, we perform a qualitative or quantitative impairment test. Under the qualitative approach, if we determine that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, we are required to perform the quantitative analysis to determine the fair value for the reporting unit. We then compare the fair value of the reporting unit with its carrying amount and recognize an impairment loss for the amount by which the carrying amount exceeds the fair value of the reporting unit. The loss recognized should not exceed the total amount of goodwill allocated to the reporting unit. We also consider income tax effects from any tax-deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. For information regarding impairments of goodwill during the three- and nine-month periods ended September 30, 2020, see Note 4—“Impairments” and Note 10—“Business Segment Information.” We did not identify indicators of impairment for goodwill for the three- and nine-month periods ended September 30, 2021. Foreign Currency Translation. The functional currency for most of our foreign subsidiaries is the applicable local currency. Results of operations for foreign subsidiaries with functional currencies other than the U.S. dollar are translated into U.S. dollars using average exchange rates during the period. Assets and liabilities of these foreign subsidiaries are translated into U.S. dollars using the exchange rates in effect as of the balance sheet date, and the resulting translation adjustments are recognized, net of tax, in accumulated other comprehensive income (loss) as a component of shareholders' equity. All foreign currency transaction gains and losses are recognized currently in the Consolidated Statements of Operations. We recorded $(0.3) million and $(4.0) million of foreign currency transaction gains (losses) in the three- and nine-month periods ended September 30, 2021, respectively. We recorded $(2.5) million and $(13) million of foreign currency transaction gains (losses) in the three- and nine-month periods ended September 30, 2020, respectively. Those amounts are included as a component of other income (expense), net in our Consolidated Statement of Operations. Revenue Recognition. All our revenue is realized through contracts with customers. We recognize our revenue according to the contract type. On a daily basis, we recognize service revenue over time for contracts that provide for specific time, material and equipment charges, which we bill periodically, ranging from weekly to monthly. We use an input method to recognize revenue, because each day of service provided represents value to the customer. The performance obligations in these contracts are satisfied, and revenue is recognized, as the work is performed. When appropriate, we apply the practical expedient to recognize revenue for the amount invoiced when the invoice corresponds directly to the value of our performance to date. We account for significant fixed-price contracts, mainly relating to our Manufactured Products segment, and to a lesser extent in our Offshore Projects Group (“OPG”) and Aerospace and Defense Technologies (“ADTech”) segments, by recognizing revenue over time using an input, cost-to-cost measurement percentage-of-completion method. This commonly used method allows appropriate calculation of progress on our contracts. A performance obligation is satisfied as we create a product on behalf of the customer over the life of the contract. The remainder of our revenue is recognized at the point in time when control transfers to the customer, thus satisfying the performance obligation. We have elected to recognize the cost for freight and shipping as an expense when 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 us from customers, are excluded from revenue. In our service-based business lines, we principally charge on a dayrate basis for services provided. In our product-based business lines, predominantly in our Manufactured Products segment, we recognize revenue and profit using the percentage-of-completion method and exclude uninstalled materials and significant inefficiencies from the measure of progress. We apply judgment in the determination and allocation of transaction price to performance obligations, and the subsequent recognition of revenue, based on the facts and circumstances of each contract. We routinely review estimates related to our contracts and, when required, reflect revisions to profitability in earnings immediately. If an element of variable consideration has the potential for a significant future reversal of revenue, we will constrain that variable consideration to a level intended to remove the potential future reversal. If a current estimate of total contract cost indicates an ultimate loss on a contract, we recognize the projected loss in full when we determine it. During the three- and nine-month periods ended September 30, 2021, we recognized a projected loss of $2.1 million for a contract in our Subsea Robotics segment. We did not have any material adjustments during the three- and nine-month periods ended September 30, 2020. There could be significant adjustments to overall contract costs in the future, due to changes in facts and circumstances. In general, our payment terms consist of those services billed regularly as provided and those products delivered at a point in time, which are invoiced after the performance obligation is satisfied. Our product and service contracts with milestone payments due at agreed progress points during the contract are invoiced when those milestones are reached, which may differ from the timing of revenue recognition. Our payment terms generally do not provide financing of contracts to customers, nor do we receive financing from customers as a result of these terms. See Note 3—“Revenue” for more information on our revenue from contracts with customers. Leases. We determine whether a contract is or contains a lease at inception, whether as a lessee or a lessor. We take into consideration the elements of an identified asset, right to control and the receipt of economic benefit in making those determinations. As a lessor, we lease certain types of equipment along with the provision of services and utilize the expedient allowing us to combine the lease and non-lease components into a combined component that is accounted for (1) under “ Leases ” ( “ ASC 842”), when the lease component is predominant, and (2) under the accounting standard “ Revenue from Contracts with Customers ” (“ASC 606”), when the service component is predominant. In general, when we have a service component, it is typically the predominant element and leads to accounting under ASC 606. As a lessor, we lease certain types of equipment, often providing services at the same time. These leases can be priced on a dayrate or lump-sum basis for periods ranging from a few days to multi-year contracts. These leases are negotiated on commercial terms at market rates and many carry standard options to extend or terminate at our customer's discretion. These leases generally do not contain options to purchase, material restrictions or covenants that impact our accounting for leases. As a lessee, we lease land, buildings, vessels and equipment for the operation of our business and to support some of our service line revenue streams. These generally carry lease terms that range from days for operational and support equipment to 15 years for land and buildings. These leases are negotiated on commercial terms at market rates and many carry standard options to extend or terminate at our discretion. When the exercise of those options is reasonably certain, we include them in the lease assessment. Our leases do not contain material restrictions or covenants that impact our accounting for them, nor do we provide residual value guarantees. As a lessee, we utilize the practical expedients to not recognize leases with an initial lease term of 12 months or less on the balance sheet and to combine lease and non-lease components together and account for the combined component as a lease for all asset classes, except real estate. Right-of-use operating lease assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement or modification date. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate, based on the information available at commencement or modification date in determining the present value of future payments. In determining the incremental borrowing rate, we considered our external credit ratings, bond yields for us and our identified peers, the risk-free rate in geographic regions where we operate, and the impact associated with providing collateral over a similar term as the lease for an amount equal to the future lease payments. Our right-of-use operating lease assets also include any lease prepayments made and exclude lease incentives and initial direct costs incurred. Our lease terms may include options to extend or terminate the lease. These options are included in the lease term when it is reasonably certain that we will exercise that option. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term.
Allowance for Credit Losses	Allowances for Credit Loss—Financial Assets Measured at Amortized Costs. We identify allowances for credit loss based on future expected losses when accounts receivable, contract assets or held-to-maturity loan receivables are created rather than when losses are probable. We use the loss-rate method in developing the allowance for credit losses, which involves identifying pools of assets with similar risk characteristics, reviewing historical losses within the last three years and consideration of reasonable supportable forecasts of economic indicators. Changes in estimates, developing trends and other new information could have material effects on future evaluations. We monitor the credit quality of our accounts receivable and other financing receivable amounts by frequent customer interaction, following economic and industry trends and reviewing specific customer data. Our other receivable amounts include contract assets and held-to-maturity loans receivable, which historically we consider to have a low risk of loss. We are monitoring the impacts from the coronavirus (“COVID-19”) pandemic and volatility in the oil and natural gas markets on our customers and various counterparties. We have considered the current and expected economic and market conditions, as a result of COVID-19, in determining credit loss expense for the three- and nine-month periods ended September 30, 2021 and 2020. As of September 30, 2021, our allowance for credit losses was $1.5 million for accounts receivable and $0.8 million for other receivables. Financial assets are written off when deemed uncollectible and there is no reasonable expectation of recovering the contractual cash flows. During the three- and nine-month periods ended September 30, 2021, we wrote off accounts receivable of less than $0.1 million and $3.1 million, respectively, that previously had been reserved. We have elected to apply the practical expedient available under “ Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ,” as amended, (“ASC 326”) to exclude the accrued interest receivable balance that is included in our held-to-maturity loans receivable. The amount excluded as of September 30, 2021 and December 31, 2020 was $1.3 million and $1.5 million, respectively. Accounts receivable are considered to be past-due after the end of the contractual terms agreed to with the customer. There were no material past-due amounts that we consider uncollectible for our financial assets as of September 30, 2021. We generally do not require collateral from our customers. As of September 30, 2021, our accounts receivable included $11 million from one of our customers in our Manufactured Products segment that is a subsidiary of a China-based company that has been and remains subject to well-published financial challenges. See Note 8—”Commitments and Contingencies” for discussion regarding our outstanding accounts receivable from this customer.
Asset Impairment Charges	IMPAIRMENTS Goodwill We did not identify any triggering events and, accordingly, no impairments of goodwill were recorded in the three- and nine-month periods ended September 30, 2021. After reallocation of our goodwill to our new segments in the third quarter of 2020, we determined that impairment indicators were present and performed quantitative analyses for our Subsea Robotics and Manufactured Products reporting units. Based on these quantitative analyses, the fair value was determined to be less than the carrying value for our Manufactured Products unit, but not for our Subsea Robotics reporting unit. As a result, for our Manufactured Products unit, we recorded a pre-tax goodwill impairment loss of $41 million in the three-month period ended September 30, 2020. During the first quarter of 2020, due to the protracted energy downturn compounded by demand destruction resulting from the adverse impacts of the COVID-19 pandemic and insufficient control of crude oil supply levels during the quarter, as well as our customers' continued focus on cost discipline, we determined that impairment indicators were present and we were required to perform a quantitative analysis for our Subsea Products–Service, Technology and Rentals (“ST&R”), Subsea Products–Manufactured Products, Subsea Projects, Asset Integrity and Advanced Technologies–Commercial reporting units. Based on these quantitative analyses, the fair value was determined to be less than the carrying value for each of those reporting units, with the exception of Subsea Products–Manufactured Products. As a result, for our Subsea Products–ST&R, Subsea Projects, Asset Integrity and Advanced Technologies–Commercial reporting units, we recorded pre-tax goodwill impairment losses of $51 million, $130 million, $111 million and $11 million, respectively. For our Remotely Operated Vehicles (“ROV”) and Advanced Technologies–Government reporting units, qualitative assessments were performed; and we concluded that it was more likely than not the fair value of each of those reporting units was more than the carrying value of the reporting unit and, therefore, no impairments were recorded for those reporting units. Our estimates of fair values for our reporting units determined in the first and third quarters of 2020 required us to use significant unobservable inputs, classified as Level 3 fair value measurements, including assumptions related to future performance, risk-adjusted discount rates, future commodity prices and demand for our services and estimates of expected realizable values. For our cash flow projections in each of those periods, we utilized a weighted-average cost of capital ranging from 11% to 15% and a terminal value based on the Gordon Growth Model, assuming an expected long-term growth rate of 2%. Our third quarter 2020 change in our operating segments resulted in one reporting unit for each of our new segments. The following table reflects goodwill impairments, as recorded in the three-month period ended March 31, 2020, and allocated, based on historical cost, to our new reporting segments: Three Months Ended March 31, 2020 (in thousands) As originally recorded As recast to reflect segment changes Segment/Reporting Unit Goodwill Impairment Subsea Robotics Manufactured Products OPG IMDS Total Subsea Products/ST&R $ 51,302 $ 17,457 $ — $ 33,845 $ — $ 51,302 Subsea Projects/Subsea Projects 129,562 84,661 — 32,440 12,461 129,562 Asset Integrity/Asset Integrity 110,753 — — — 110,753 110,753 Advanced Technologies/Commercial 11,388 — 11,388 — — 11,388 Total goodwill impairment $ 303,005 $ 102,118 $ 11,388 $ 66,285 $ 123,214 $ 303,005 Aside from the goodwill impairments discussed above, the changes in our reporting units' goodwill balances during the periods presented are from currency exchange rate changes. For further information regarding goodwill by business segment, see Note 10–"Business Segment Information." Property and Equipment and Intangible Assets We did not identify any triggering events and, accordingly, no impairments of long-lived assets were recorded in the three- and nine-month periods ended September 30, 2021. After reallocation of our long-lived assets to our new segments in the third quarter of 2020, we determined that impairment indicators were present and performed a quantitative assessment for our Manufactured Products asset groups. Based on that assessment, we concluded that it was more likely than not that the fair value of the asset groups within Manufactured Products was more than the carrying value of each asset group and, therefore, no impairment was required. We did not identify any triggering events for our asset groups other than those included in Manufactured Products during the third quarter of 2020. During the first quarter of 2020, due to the protracted energy downturn compounded by demand destruction resulting from the adverse impacts of the COVID-19 pandemic and insufficient control of crude oil supply levels during the quarter, as well as our customers' continued focus on cost discipline, we determined that impairment indicators were present within certain of our asset groups. To measure fair value for these asset groups, we used the following approaches: • Subsea Distribution Solutions U.K. - We utilized the cost approach and considered economic obsolescence under the income approach to determine fair value of the property and equipment. • Subsea Distribution Solutions Brazil and Angola - We utilized a combination of market and cost approaches to measure fair values. • Shallow Water vessels - We utilized the cost approach and considered historical, current and anticipated dayrates and utilization to measure market value. • Renewables and Special Projects - We utilized a combination of market and cost approaches to measure fair values. • Oceaneering Entertainment Systems and Oceaneering Automated Guided Vehicles (“AGV”) Systems - We utilized a combination of market and cost approaches to measure fair value. Our estimates of fair value for these asset groups required us to use significant unobservable inputs, classified as Level 3 fair value measurements, including assumptions related to future performance, risk-adjusted discount rates, future commodity prices and demand for our services and estimates of expected realizable value. In the first quarter of 2020, our cash flow projections utilized a weighted-average cost of capital ranging from 12% to 15% and a terminal value based on the Gordon Growth Model, assuming an expected long-term growth rate of 2%. Our third quarter 2020 change in operating segments did not result in any changes in our asset groups. Our reporting units with long-lived asset impairments in the three-month period ended March 31, 2020, were realigned in our new reporting segments as follows: Three Months Ended March 31, 2020 (in thousands) As originally recorded As recast to reflect segment changes Segment/Reporting Unit Long-lived Asset Impairments Manufactured Products OPG IMDS Total Subsea Products Subsea Distribution Solutions U.K. $ 6,543 $ 6,543 $ — $ — $ 6,543 Subsea Distribution Solutions Brazil 9,834 9,834 — — 9,834 Subsea Distribution Solutions Angola 38,482 38,482 — — 38,482 Subsea Projects Shallow Water vessels 3,894 — 3,894 — 3,894 Renewables and Special Projects Group 3,628 — 3,628 — 3,628 Global Data Solutions 167 — — 167 167 Advanced Technologies Oceaneering Entertainment Systems 5,065 5,065 — — 5,065 Oceaneering AGV Systems 1,150 1,150 — — 1,150 Total long-lived asset impairments $ 68,763 $ 61,074 $ 7,522 $ 167 $ 68,763

Revenue

Revenue	9 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Revenue	REVENUE Revenue by Category The following tables presents revenue disaggregated by business segment, geographical region, and timing of transfer of goods or services. Three Months Ended Nine Months Ended (in thousands) Sep 30, 2021 Sep 30, 2020 Sep 30, 2021 Sep 30, 2020 Business Segment: Energy Services and Products Subsea Robotics $ 143,710 $ 119,617 $ 404,200 $ 378,621 Manufactured Products 75,359 110,416 241,311 377,520 Offshore Projects Group 95,580 73,212 292,765 221,306 Integrity Management & Digital Solutions 62,806 53,933 180,924 172,631 Total Energy Services and Products 377,455 357,178 1,119,200 1,150,078 Aerospace and Defense Technologies 89,359 82,565 283,366 253,549 Total $ 466,814 $ 439,743 $ 1,402,566 $ 1,403,627 Geographic Operating Areas: Foreign: Africa $ 78,890 $ 43,077 $ 213,087 $ 158,143 Norway 51,269 57,138 160,923 154,745 United Kingdom 46,254 68,568 135,401 191,781 Asia and Australia 43,919 30,715 123,616 113,517 Brazil 30,238 19,296 78,411 64,902 Other 22,912 22,071 69,183 69,355 Total Foreign 273,482 240,865 780,621 752,443 United States 193,332 198,878 621,945 651,184 Total $ 466,814 $ 439,743 $ 1,402,566 $ 1,403,627 Timing of Transfer of Goods or Services: Revenue recognized over time $ 437,086 $ 411,809 $ 1,316,733 $ 1,306,889 Revenue recognized at a point in time 29,728 27,934 85,833 96,738 Total $ 466,814 $ 439,743 $ 1,402,566 $ 1,403,627 Contract Balances Our contracts with milestone payments have, in the aggregate, a significant impact on the contract asset and the contract liability balances. Milestones are contractually agreed with customers and relate to significant events across the contract lives. Some milestones are achieved before revenue is recognized, resulting in a contract liability, while other milestones are achieved after revenue is recognized, resulting in a contract asset. The following table provides information about contract assets and contract liabilities from contracts with customers. Nine Months Ended (in thousands) Sep 30, 2021 Sep 30, 2020 Total contract assets, beginning of period $ 221,997 $ 221,288 Revenue accrued 1,355,567 1,271,033 Amounts billed (1,322,892) (1,271,561) Total contract assets, end of period $ 254,672 $ 220,760 Total contract liabilities, beginning of period $ 50,046 $ 117,342 Deferrals of milestone payments 47,246 46,223 Recognition of revenue for goods and services (46,538) (117,999) Total contract liabilities, end of period $ 50,754 $ 45,566 Performance Obligations As of September 30, 2021, the aggregate amount of the transaction price allocated to remaining performance obligations that were unsatisfied (or partially unsatisfied) was $221 million. In arriving at this value, we have used two practical expedients available to us and are not disclosing amounts in relation to performance obligations: (1) that are part of contracts with an original expected duration of one year or less; or (2) on contracts where we recognize revenue in line with the billing. Of this amount, we expect to recognize revenue of $119 million over the next 12 months, and we expect to recognize substantially all of the remaining balance of $102 million within the next 24 months. As of September 30, 2021, our contract assets included $38 million from one of our customers in our Manufactured Products segment that is a subsidiary of a China-based company that has been and remains subject to well-published financial challenges. See Note 8—”Commitments and Contingencies” for discussion regarding our contract assets due from this customer. Due to the nature of our service contracts in our Subsea Robotics, OPG, Integrity Management & Digital Solutions (“IMDS”) and ADTech segments, the majority of our contracts either have initial contract terms of one year or less or have customer option cancellation clauses that lead us to consider the original expected duration of one year or less. In our Manufactured Products and ADTech segments, we have long-term contracts that extend beyond one year, and these make up the majority of the performance obligations balance reported as of September 30, 2021. We also have shorter-term product contracts with an expected original duration of one year or less that have been excluded. Where appropriate, we have made estimates within the transaction price of elements of variable consideration within the contracts and constrained those amounts to a level where we consider it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved. The amount of revenue recognized in the nine months ended September 30, 2021 that was associated with performance obligations completed or partially completed in prior periods was not significant. As of September 30, 2021, there were no significant outstanding liability balances for refunds or returns due to the nature of our contracts and the services and products we provide. Our warranties are limited to assurance warranties that are of a standard length and are not considered to be material rights . The majority of our contracts consist of a single performance obligation. When there are multiple obligations, we look for observable evidence of stand-alone selling prices on which to base the allocation. This involves judgment as to the appropriateness of the observable evidence relating to the facts and circumstances of the contract. If we do not have observable evidence, we estimate stand-alone selling prices by taking a cost-plus-margin approach, using typical margins from the type of product or service, customer and regional geography involved. Costs to Obtain or Fulfill a Contract In line with the available practical expedient, we capitalize costs to obtain a contract when those amounts are significant and the contract is expected at inception to exceed one year in duration. Otherwise, the costs are expensed in the period when incurred. Costs to obtain a contract primarily consist of bid and proposal costs, which are incremental to our fixed costs. There were no balances or amortization of costs to obtain a contract in the current reporting periods.

Selected Balance Sheet Informat

Selected Balance Sheet Information	9 Months Ended
	Sep. 30, 2021
Balance Sheet Related Disclosures [Abstract]
Selected Balance Sheet Information	SELECTED BALANCE SHEET INFORMATION The following is information regarding selected balance sheet accounts: (in thousands) Sep 30, 2021 Dec 31, 2020 Inventory: Remotely operated vehicle parts and components $ 62,978 $ 62,788 Other inventory, primarily raw materials 65,891 78,453 Total $ 128,869 $ 141,241 Other current assets: Prepaid expenses $ 54,078 $ 48,616 Angolan bonds 6,665 10,179 Total $ 60,743 $ 58,795 Accrued liabilities: Payroll and related costs $ 130,555 $ 135,042 Accrued job costs 50,323 47,721 Income taxes payable 46,706 35,929 Current operating lease liability 20,008 18,798 Other 55,064 55,373 Total $ 302,656 $ 292,863

Debt

Debt	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Debt	DEBT Long-term debt consisted of the following: (in thousands) Sep 30, 2021 Dec 31, 2020 4.650% Senior Notes due 2024 $ 436,990 $ 500,000 6.000% Senior Notes due 2028 300,000 300,000 Interest rate swap settlements 7,772 10,870 Unamortized debt issuance costs (4,782) (5,619) Long-term debt $ 739,980 $ 805,251 In November 2014, we completed the public offering of $500 million aggregate principal amount of 4.650% Senior Notes due 2024 (the “2024 Senior Notes”). We pay interest on the 2024 Senior Notes on May 15 and November 15 of each year. The 2024 Senior Notes are scheduled to mature on November 15, 2024. In February 2018, we completed the public offering of $300 million aggregate principal amount of 6.000% Senior Notes due 2028 (the “2028 Senior Notes”). We pay interest on the 2028 Senior Notes on February 1 and August 1 of each year. The 2028 Senior Notes are scheduled to mature on February 1, 2028. We may redeem some or all of the 2024 Senior Notes and 2028 Senior Notes (collectively, the “Senior Notes”) at specified redemption prices. In the three months ended September 30, 2021, we repurchased approximately $33 million in aggregate principal amount of the 2024 Senior Notes in open market transactions. The aggregate purchase price in the three months ended September 30, 2021 included accrued and unpaid interest to the repurchase date of $0.4 million, and we recorded loss on extinguishment of debt of $0.3 million (including premiums and fees associated with the repurchases). In the nine months ended September 30, 2021, we repurchased approximately $63 million in aggregate principal amount of the 2024 Senior Notes in open market transactions. The aggregate purchase price in the nine months ended September 30, 2021 included accrued and unpaid interest to the repurchase date of $0.7 million, and we recorded loss on extinguishment of debt of $0.4 million (including premiums and fees associated with the repurchases). In October 2014, we entered into a credit agreement (as amended, the “Credit Agreement”) with a group of banks. The Credit Agreement initially provided for a $500 million five-year revolving credit facility (the “Revolving Credit Facility”). Subject to certain conditions, the aggregate commitments under the Revolving Credit Facility may be increased by up to $300 million at any time upon agreement between us and existing or additional lenders. Borrowings under the Revolving Credit Facility may be used for general corporate purposes. The Credit Agreement also provided for a $300 million term loan, which we repaid in full in February 2018, using net proceeds from the issuance of our 2028 Senior Notes referred to above, and cash on hand. In February 2018, we entered into Agreement and Amendment No. 4 to the Credit Agreement (“Amendment No. 4”). Amendment No. 4 amended the Credit Agreement to, among other things, extend the maturity of the Revolving Credit Facility to January 25, 2023 with the extending lenders, which represent 90% of the existing commitments of the lenders, such that the total commitments for the Revolving Credit Facility will be $500 million until October 25, 2021, and thereafter $450 million until January 25, 2023. As of September 30, 2021, we had no borrowings outstanding under the Revolving Credit Facility. Borrowings under the Revolving Credit Facility bear interest at an Adjusted Base Rate or the Eurodollar Rate (both as defined in the Credit Agreement), at our option, plus an applicable margin based on our Leverage Ratio (as defined in the Credit Agreement) and, at our election, based on the ratings of our senior unsecured debt by designated ratings services, thereafter to be based on such debt ratings. The applicable margin varies: (1) in the case of advances bearing interest at the Adjusted Base Rate, from 0.125% to 0.750%; and (2) in the case of advances bearing interest at the Eurodollar Rate, from 1.125% to 1.750%. The Adjusted Base Rate is the highest of (1) the per annum rate established by the administrative agent as its prime rate, (2) the federal funds rate plus 0.50% and (3) the daily one-month LIBOR plus 1%. We pay a commitment fee ranging from 0.125% to 0.300% on the unused portion of the Revolving Credit Facility, depending on our Leverage Ratio. The commitment fees are included as interest expense in our consolidated financial statements. The Credit Agreement contains various covenants that we believe are customary for agreements of this nature, including, but not limited to, restrictions on our ability and the ability of each of our subsidiaries to incur debt, grant liens, make certain investments, make distributions, merge or consolidate, sell assets and enter into certain restrictive agreements. We are also subject to a maximum adjusted total Capitalization Ratio (as defined in the Credit Agreement and which stipulates that, among other items, we exclude any impacts associated with current and prior period impairments) of 55%. The Credit Agreement includes customary events of default and associated remedies. As of September 30, 2021, we were in compliance with all the covenants set forth in the Credit Agreement. We had two interest rate swaps in place relating to a total of $200 million of the 2024 Senior Notes for the period to November 2024. The agreements swapped the fixed interest rate of 4.65% on $100 million of the 2024 Senior Notes to the floating rate of one-month LIBOR plus 2.426% and on another $100 million to one-month LIBOR plus 2.823%. In March 2020, we settled both interest rate swaps with the counterparty for cash proceeds of $13 million. The settlement resulted in a $13 million increase to our long-term debt balance that will be amortized to interest expense prospectively through the maturity date for the 2024 Senior Notes using the effective interest method. As a result, in the three- and nine-month periods ended September 30, 2021, we amortized $1.2 million and $3.1 million to interest expense, including $0.6 million and $1.2 million, respectively, for the pro-rata write-off of interest rate swap settlement gains associated with the 2024 Senior Notes repurchases discussed above. We amortized $0.6

Leases

Leases	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Summary Of Major Accounting Policies	SUMMARY OF MAJOR ACCOUNTING POLICIES Basis of Presentation . Oceaneering International, Inc. (“Oceaneering,” “we” or “us”) has prepared these unaudited consolidated financial statements pursuant to instructions for quarterly reports on Form 10-Q, which we are required to file with the United States Securities and Exchange Commission (the “SEC”). These financial statements do not include all information and footnotes normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”). These financial statements reflect all adjustments that we believe are necessary to present fairly our financial position as of September 30, 2021 and our results of operations and cash flows for the periods presented. Except as otherwise disclosed herein, all such adjustments are of a normal and recurring nature. These financial statements should be read in conjunction with the consolidated financial statements and related notes included in our annual report on Form 10-K for the year ended December 31, 2020. The results for interim periods are not necessarily indicative of annual results. Principles of Consolidation. The consolidated financial statements include the accounts of Oceaneering and our 50% or more owned and controlled subsidiaries. We also consolidate entities that are determined to be variable interest entities if we determine that we are the primary beneficiary; otherwise, we account for those entities using the equity method of accounting. We use the equity method to account for our investments in unconsolidated affiliated companies of which we own an equity interest of between 20% and 50% and as to which we have significant influence, but not control, over operations. We use the cost method for all other long-term investments. Investments in entities that we do not consolidate are reflected on our balance sheet in other noncurrent assets. We eliminate intercompany transactions and accounts in consolidation. Use of Estimates. The preparation of financial statements in conformity with U.S. GAAP requires that our management make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expense during the reporting period. Actual results could differ from those estimates. Cash and Cash Equivalents. Cash and cash equivalents include demand deposits and highly liquid investments with original maturities of three months or less from the date of investment. Allowances for Credit Loss—Financial Assets Measured at Amortized Costs. We identify allowances for credit loss based on future expected losses when accounts receivable, contract assets or held-to-maturity loan receivables are created rather than when losses are probable. We use the loss-rate method in developing the allowance for credit losses, which involves identifying pools of assets with similar risk characteristics, reviewing historical losses within the last three years and consideration of reasonable supportable forecasts of economic indicators. Changes in estimates, developing trends and other new information could have material effects on future evaluations. We monitor the credit quality of our accounts receivable and other financing receivable amounts by frequent customer interaction, following economic and industry trends and reviewing specific customer data. Our other receivable amounts include contract assets and held-to-maturity loans receivable, which historically we consider to have a low risk of loss. We are monitoring the impacts from the coronavirus (“COVID-19”) pandemic and volatility in the oil and natural gas markets on our customers and various counterparties. We have considered the current and expected economic and market conditions, as a result of COVID-19, in determining credit loss expense for the three- and nine-month periods ended September 30, 2021 and 2020. As of September 30, 2021, our allowance for credit losses was $1.5 million for accounts receivable and $0.8 million for other receivables. Financial assets are written off when deemed uncollectible and there is no reasonable expectation of recovering the contractual cash flows. During the three- and nine-month periods ended September 30, 2021, we wrote off accounts receivable of less than $0.1 million and $3.1 million, respectively, that previously had been reserved. We have elected to apply the practical expedient available under “ Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ,” as amended, (“ASC 326”) to exclude the accrued interest receivable balance that is included in our held-to-maturity loans receivable. The amount excluded as of September 30, 2021 and December 31, 2020 was $1.3 million and $1.5 million, respectively. Accounts receivable are considered to be past-due after the end of the contractual terms agreed to with the customer. There were no material past-due amounts that we consider uncollectible for our financial assets as of September 30, 2021. We generally do not require collateral from our customers. As of September 30, 2021, our accounts receivable included $11 million from one of our customers in our Manufactured Products segment that is a subsidiary of a China-based company that has been and remains subject to well-published financial challenges. See Note 8—”Commitments and Contingencies” for discussion regarding our outstanding accounts receivable from this customer. Inventory . Inventory is valued at the lower of cost or net realizable value. We determine cost using the weighted-average method. We periodically review the value of items in inventory and record write-downs or write-offs of inventory based on our assessment of market conditions. Write-downs and write-offs are charged to cost of services and products. We did not record any write-downs or write-offs of inventory in the three- and nine-month periods ended September 30, 2021, as compared to $7.0 million of write-downs and write-offs in the three- and nine-month periods ended September 30, 2020. Property and Equipment, Long-Lived Intangible Assets and Right-of-Use Operating Lease Assets. We provide for depreciation of property and equipment on the straight-line method over estimated useful lives. We charge the costs of repair and maintenance of property and equipment to operations as incurred, and we capitalize the costs of improvements that extend asset lives or functionality. Upon the disposition of property and equipment, the related cost and accumulated depreciation accounts are relieved, and any resulting gain or loss is included as an adjustment to cost of services and products. We capitalize interest on assets where the construction period is anticipated to be more than three months. We did not capitalize interest in the three- and nine-month periods ended September 30, 2021 and 2020. We do not allocate general administrative costs to capital projects. Long-lived intangible assets, primarily acquired in connection with business combinations, include trade names, intellectual property and customer relationships and are being amortized over their respective estimated useful lives. Our management periodically, and upon the occurrence of a triggering event, reviews the realizability of our property and equipment, long-lived intangible assets and right-of-use operating lease assets to determine whether any events or changes in circumstances indicate that the carrying amounts of the assets may not be recoverable. For long-lived assets to be held and used, we base our evaluation on impairment indicators such as the nature of the assets, the future economic benefits of the assets, any historical or future profitability measurements and other external market conditions or factors that may be present. If such impairment indicators are present or other factors exist that indicate that the carrying amount of an asset may not be recoverable, we determine whether an impairment has occurred through the use of an undiscounted cash flows analysis of the asset at the lowest level for which identifiable cash flows exist. If an impairment has occurred, we recognize a loss for the difference between the carrying amount and the fair value of the asset. For information regarding write-downs and write-offs of property and equipment, long-lived intangible assets and right-of-use operating lease assets in the three- and nine-month periods ended September 30, 2020, see Note 4—“Impairments” and Note 10—“Business Segment Information.” We did not identify indicators of impairment for property and equipment, long-lived intangible assets and right-of-use operating lease assets for the three- and nine-month periods ended September 30, 2021. For assets held for sale or disposal, the fair value of the asset is measured using fair market value less estimated costs to sell. Assets are classified as held for sale when we have a plan for disposal of certain assets and those assets meet the held for sale criteria. For additional information regarding right-of-use operating lease assets, see “ Leases” below. Goodwill. Our goodwill is evaluated for impairment annually and whenever we identify certain triggering events or circumstances that would more likely than not reduce the fair value of a reporting unit below its carrying amount. In our annual evaluation of goodwill, we perform a qualitative or quantitative impairment test. Under the qualitative approach, if we determine that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, we are required to perform the quantitative analysis to determine the fair value for the reporting unit. We then compare the fair value of the reporting unit with its carrying amount and recognize an impairment loss for the amount by which the carrying amount exceeds the fair value of the reporting unit. The loss recognized should not exceed the total amount of goodwill allocated to the reporting unit. We also consider income tax effects from any tax-deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. For information regarding impairments of goodwill during the three- and nine-month periods ended September 30, 2020, see Note 4—“Impairments” and Note 10—“Business Segment Information.” We did not identify indicators of impairment for goodwill for the three- and nine-month periods ended September 30, 2021. Foreign Currency Translation. The functional currency for most of our foreign subsidiaries is the applicable local currency. Results of operations for foreign subsidiaries with functional currencies other than the U.S. dollar are translated into U.S. dollars using average exchange rates during the period. Assets and liabilities of these foreign subsidiaries are translated into U.S. dollars using the exchange rates in effect as of the balance sheet date, and the resulting translation adjustments are recognized, net of tax, in accumulated other comprehensive income (loss) as a component of shareholders' equity. All foreign currency transaction gains and losses are recognized currently in the Consolidated Statements of Operations. We recorded $(0.3) million and $(4.0) million of foreign currency transaction gains (losses) in the three- and nine-month periods ended September 30, 2021, respectively. We recorded $(2.5) million and $(13) million of foreign currency transaction gains (losses) in the three- and nine-month periods ended September 30, 2020, respectively. Those amounts are included as a component of other income (expense), net in our Consolidated Statement of Operations. Revenue Recognition. All our revenue is realized through contracts with customers. We recognize our revenue according to the contract type. On a daily basis, we recognize service revenue over time for contracts that provide for specific time, material and equipment charges, which we bill periodically, ranging from weekly to monthly. We use an input method to recognize revenue, because each day of service provided represents value to the customer. The performance obligations in these contracts are satisfied, and revenue is recognized, as the work is performed. When appropriate, we apply the practical expedient to recognize revenue for the amount invoiced when the invoice corresponds directly to the value of our performance to date. We account for significant fixed-price contracts, mainly relating to our Manufactured Products segment, and to a lesser extent in our Offshore Projects Group (“OPG”) and Aerospace and Defense Technologies (“ADTech”) segments, by recognizing revenue over time using an input, cost-to-cost measurement percentage-of-completion method. This commonly used method allows appropriate calculation of progress on our contracts. A performance obligation is satisfied as we create a product on behalf of the customer over the life of the contract. The remainder of our revenue is recognized at the point in time when control transfers to the customer, thus satisfying the performance obligation. We have elected to recognize the cost for freight and shipping as an expense when 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 us from customers, are excluded from revenue. In our service-based business lines, we principally charge on a dayrate basis for services provided. In our product-based business lines, predominantly in our Manufactured Products segment, we recognize revenue and profit using the percentage-of-completion method and exclude uninstalled materials and significant inefficiencies from the measure of progress. We apply judgment in the determination and allocation of transaction price to performance obligations, and the subsequent recognition of revenue, based on the facts and circumstances of each contract. We routinely review estimates related to our contracts and, when required, reflect revisions to profitability in earnings immediately. If an element of variable consideration has the potential for a significant future reversal of revenue, we will constrain that variable consideration to a level intended to remove the potential future reversal. If a current estimate of total contract cost indicates an ultimate loss on a contract, we recognize the projected loss in full when we determine it. During the three- and nine-month periods ended September 30, 2021, we recognized a projected loss of $2.1 million for a contract in our Subsea Robotics segment. We did not have any material adjustments during the three- and nine-month periods ended September 30, 2020. There could be significant adjustments to overall contract costs in the future, due to changes in facts and circumstances. In general, our payment terms consist of those services billed regularly as provided and those products delivered at a point in time, which are invoiced after the performance obligation is satisfied. Our product and service contracts with milestone payments due at agreed progress points during the contract are invoiced when those milestones are reached, which may differ from the timing of revenue recognition. Our payment terms generally do not provide financing of contracts to customers, nor do we receive financing from customers as a result of these terms. See Note 3—“Revenue” for more information on our revenue from contracts with customers. Leases. We determine whether a contract is or contains a lease at inception, whether as a lessee or a lessor. We take into consideration the elements of an identified asset, right to control and the receipt of economic benefit in making those determinations. As a lessor, we lease certain types of equipment along with the provision of services and utilize the expedient allowing us to combine the lease and non-lease components into a combined component that is accounted for (1) under “ Leases ” ( “ ASC 842”), when the lease component is predominant, and (2) under the accounting standard “ Revenue from Contracts with Customers ” (“ASC 606”), when the service component is predominant. In general, when we have a service component, it is typically the predominant element and leads to accounting under ASC 606. As a lessor, we lease certain types of equipment, often providing services at the same time. These leases can be priced on a dayrate or lump-sum basis for periods ranging from a few days to multi-year contracts. These leases are negotiated on commercial terms at market rates and many carry standard options to extend or terminate at our customer's discretion. These leases generally do not contain options to purchase, material restrictions or covenants that impact our accounting for leases. As a lessee, we lease land, buildings, vessels and equipment for the operation of our business and to support some of our service line revenue streams. These generally carry lease terms that range from days for operational and support equipment to 15 years for land and buildings. These leases are negotiated on commercial terms at market rates and many carry standard options to extend or terminate at our discretion. When the exercise of those options is reasonably certain, we include them in the lease assessment. Our leases do not contain material restrictions or covenants that impact our accounting for them, nor do we provide residual value guarantees. As a lessee, we utilize the practical expedients to not recognize leases with an initial lease term of 12 months or less on the balance sheet and to combine lease and non-lease components together and account for the combined component as a lease for all asset classes, except real estate. Right-of-use operating lease assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement or modification date. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate, based on the information available at commencement or modification date in determining the present value of future payments. In determining the incremental borrowing rate, we considered our external credit ratings, bond yields for us and our identified peers, the risk-free rate in geographic regions where we operate, and the impact associated with providing collateral over a similar term as the lease for an amount equal to the future lease payments. Our right-of-use operating lease assets also include any lease prepayments made and exclude lease incentives and initial direct costs incurred. Our lease terms may include options to extend or terminate the lease. These options are included in the lease term when it is reasonably certain that we will exercise that option. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term.

Commitments And Contingencies

Commitments And Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	COMMITMENTS AND CONTINGENCIES Litigation. In the ordinary course of business, we are, from time to time, involved in litigation or subject to disputes, governmental investigations or claims related to our business activities, including, among other things: • performance- or warranty-related matters under our customer and supplier contracts and other business arrangements; and • workers’ compensation claims, Jones Act claims, occupational hazard claims, premises liability claims and other claims. Although we cannot predict the ultimate outcome of these matters, we believe that our ultimate liability, if any, that may result from these other actions and claims will not have a material adverse effect on our consolidated financial condition, results of operations or cash flows. However, because of the inherent uncertainty of litigation and other dispute resolution proceedings and, in some cases, the availability and amount of potentially available insurance, we can provide no assurance that the resolution of any particular claim or proceeding to which we are a party will not have a material effect on our consolidated financial condition, results of operations or cash flows for the fiscal period in which that resolution occurs. Financial Instruments and Risk Concentration. In the normal course of business, we manage risks associated with foreign exchange rates and interest rates through a variety of strategies, including the use of hedging transactions. As a matter of policy, we do not use derivative instruments unless we have an underlying exposure. Other financial instruments that potentially subject us to concentrations of credit risk are principally cash and cash equivalents and accounts receivable. The carrying values of cash and cash equivalents approximate their fair values due to the short-term maturity of the underlying instruments. Accounts receivable are generated from a broad group of customers, primarily from within the energy industry, which is our major source of revenue. Due to their short-term nature, carrying values of our accounts receivable and accounts payable approximate fair market values. We estimated the aggregate fair market value of the Senior Notes to be $760 million as of September 30, 2021, based on quoted prices. Since the market for the Senior Notes is not an active market, the fair value of the Senior Notes is classified within Level 2 in the fair value hierarchy under U.S. GAAP (inputs other than quoted prices in active markets for similar assets and liabilities that are observable or can be corroborated by observable market data for substantially the full terms for the assets or liabilities). Foreign currency gains (losses) in the first nine months of 2021 were primarily related to declining exchange rates for multiple currencies, none that were significant, relative to the U.S. dollar. Foreign currency gain (losses in the first nine months of 2020 were primarily related to declining exchange rate for the Angolan kwanza and the Brazilian real relative to the U.S. dollar. Foreign currency gains (losses) related to the Angolan kwanza of $0.9 million and less than $0.1 million in the three-month periods ended September 30, 2021 and 2020, respectively, and $(1.0) million and $(2.2) million in the nine-month periods ended September 30, 2021 and 2020, respectively, were primarily due to the remeasurement of our Angolan kwanza cash balances to U.S. dollars. Foreign currency gains (losses) related to the Brazilian real of less than $0.1 million and $(0.7) million in the three-month periods ended September 30, 2021 and 2020, respectively, and less than $(0.1) million and $(8.4) million in the nine-month periods ended September 30, 2021 and 2020, respectively, were primarily due to the remeasurement of our U.S. dollar denominated liability balances to the Brazilian real. We recorded foreign currency transaction losses related to the Angolan kwanza and Brazilian real as a component of other income (expense), net in our Consolidated Statements of Operations. Any conversion of cash balances from kwanza to U.S. dollars is controlled by the central bank in Angola. As of September 30, 2021 and December 31, 2020, we had the equivalent of approximately $3.5 million and $4.7 million, respectively, of kwanza cash balances in Angola reflected on our Consolidated Balance Sheets. To mitigate our currency exposure risk in Angola, we have used kwanza to purchase equivalent Angolan central bank (Banco Nacional de Angola) bonds. The bonds are denominated as U.S. dollar equivalents, so that, upon payment of semi-annual interest and principal upon maturity, payment is made in kwanza, equivalent to the respective U.S. dollars at the then-current exchange rate. As of September 30, 2021 and December 31, 2020, we had $6.7 million and $10 million, respectively, of Angolan bonds on our Consolidated Balance Sheets. Because we intend to sell the bonds if we are able to repatriate the proceeds, we have classified these bonds as available-for-sale securities, and they are recorded in other current assets on our Consolidated Balance Sheets. During the nine-month period ended September 30, 2021, we sold a portion of these bonds for $4.5 million and recognized a gain of $0.5 million as a component of interest income in our Consolidated Statement of Operations. We estimated the fair market value of the Angolan bonds to be $6.7 million and $10 million as of September 30, 2021 and December 31, 2020, respectively, using quoted market prices. Since the market for the Angolan bonds is not an active market, the fair value of the Angolan bonds is classified within Level 2 in the fair value hierarchy under U.S. GAAP. As of September 30, 2021, we have $0.4 million in unrealized gains, net of tax, related to these bonds as a component of accumulated other comprehensive loss in our Consolidated Balance Sheets. Due to the financial deterioration of one of our customers in our Manufactured Products segment that is a subsidiary of a China-based company that has been and remains subject to well-published financial challenges, certain projects that were in process for that customer have been delayed. As of September 30, 2021, we had outstanding accounts receivable of $11 million and contract assets of $38 million for those projects. As of December 31, 2020, we had outstanding accounts receivable of $11 million and contract assets of $40 million for those projects. As of September 30, 2021, the amount of our remaining performance obligations related to this customer was $38 million. We continue to closely monitor the contract along with the related accounts receivable and contract assets balances, while working with our customer to complete these projects. The recoverability of these amounts could be materially impacted by possible future events such as our customer’s project modifications, cancellations or bankruptcy.

Earnings (Loss) Per Share, Stoc

Earnings (Loss) Per Share, Stock-Based Compensation and Share Repurchase Plan	9 Months Ended
	Sep. 30, 2021
Shareholders' Equity, Earnings Per Share And Stock-Based Compensation [Abstract]
Earnings (Loss) per Share, Share-based Compensation and Share Repurchase Plan	EARNINGS (LOSS) PER SHARE, SHARE-BASED COMPENSATION AND SHARE REPURCHASE PLAN Earnings (Loss) per Share. For each period presented, the only difference between our calculated weighted-average basic and diluted number of shares outstanding is the effect of outstanding restricted stock units. In periods where we have a net loss, the effect of our outstanding restricted stock units is anti-dilutive, and therefore does not increase our diluted shares outstanding. For each period presented, our net income (loss) allocable to both common shareholders and diluted common shareholders is the same as our net income (loss) in our consolidated statements of operations. Share-Based Compensation. We have no outstanding stock options and, therefore, no share-based compensation to be recognized pursuant to stock option grants. During 2019, 2020 and through September 30, 2021, we granted restricted units of our common stock to certain of our key executives and employees. During 2019, 2020 and through September 30, 2021, our Board of Directors granted restricted common stock to our nonemployee directors. The restricted stock units granted to our key executives and key employees generally vest in full on the third anniversary of the award date, conditional on continued employment. The restricted stock unit grants can vest pro rata over three years, provided the individual meets certain age and years-of-service requirements. The grants of restricted stock to our nonemployee directors were scheduled to vest in full on the first anniversary of the award date conditional upon continued service as a director, except for the 2021 grant to one director who retired from our board of directors as of the date of our annual meeting of shareholders in May 2021, which vested on that date. Each grantee of shares of restricted stock is deemed to be the record owner of those shares during the restriction period, with the right to vote and receive any dividends on those shares. The restricted stock units outstanding have no voting or dividend rights. For each of the restricted stock units granted in 2020 through September 30, 2021, at the earlier of three years after grant or at termination of employment or service, the grantee will be issued one share of our common stock for each unit vested. As of September 30, 2021 and December 31, 2020, respective totals of 2,476,614 and 1,955,346 shares of restricted stock and restricted stock units were outstanding. We estimate that share-based compensation cost not yet recognized related to shares of restricted stock or restricted stock units, based on their grant-date fair values, was $14 million as of September 30, 2021. This expense is being recognized on a graded-vesting basis over three years for awards attributable to individuals meeting certain age and years-of-service requirements, and on a straight-line basis over the applicable vesting period of one or three years for the other awards. Share Repurchase Plan. In December 2014, our Board of Directors approved a share repurchase program under which we may repurchase up to 10 million shares of our common stock on a discretionary basis. Under the program, which has no expiration date, we had repurchased 2.0 million shares for $100 million through December 31, 2015. We have not repurchased any shares under this plan since 2015, and we are not obligated to make any future repurchases. We account for the shares we hold in treasury under the cost method, at average cost.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Our tax provision is based on (1) our earnings for the period and other factors affecting the tax provision and (2) the operations of foreign branches and subsidiaries that are subject to local income and withholding taxes. Factors that affect our tax rate include our profitability levels in general and the geographical mix from the sources of our results. The effective tax rate for the three- and nine-month periods ended September 30, 2021 and 2020 was different than the federal statutory rate of 21%, primarily due to the geographical mix of operating revenue and results, changes in valuation allowances and uncertain tax positions, and other discrete items; therefore, we do not believe a discussion of the effective tax rate is meaningful. We continue to make an assertion to indefinitely reinvest the unrepatriated earnings of any foreign subsidiary that would incur incremental tax consequences upon the distribution of such earnings or deferred taxes related to balance sheet translation gains or losses. On March 27, 2020, the U.S. Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was signed into law in the United States. In accordance with the rules and procedures under the CARES Act, we filed a 2014 refund claim to carry back our U.S. net operating loss generated in 2019 and amended our 2013 federal income tax return impacted by the net operating loss carryback. Prior to the enactment of the CARES Act, such net operating losses could only be carried forward. As a result, we expected to receive combined refunds of approximately $33 million, of which we have received $10 million as of September 30, 2021. The remaining refunds are classified as accounts receivable, net, in our consolidated balance sheet as of September 30, 2021. In 2020, we also realized a non-cash tax benefit of $8.4 million due to the carryback provision of the CARES Act recognized as a reduction in long-term liabilities. We conduct our international operations in jurisdictions that have varying laws and regulations regarding income and other taxes, some of which are subject to interpretation. We recognize the expense or benefit for an uncertain tax position if it is more likely than not to be sustainable upon audit by the applicable taxing authority. If this threshold is met, the uncertain tax position is then measured and recognized at the largest amount that we believe is greater than 50% likely of being realized upon ultimate settlement. We have accrued a net total of $14 million and $15 million in other long-term liabilities on our balance sheet for worldwide unrecognized tax liabilities as of September 30, 2021 and December 31, 2020, respectively. We account for any applicable interest and penalties related to uncertain tax positions as a component of our provision for income taxes in our consolidated financial statements. Changes in our management's judgment related to those liabilities would affect our effective income tax rate in the periods of change. Our tax returns are subject to audit by taxing authorities in multiple jurisdictions. These audits often take years to complete and settle. The following table lists the earliest tax years open to examination by tax authorities where we have significant operations: Jurisdiction Periods United States 2014 United Kingdom 2019 Norway 2016 Angola 2013 Brazil 2016 Australia 2016 We have ongoing tax audits in various jurisdictions. The outcome of these audits may have an impact on uncertain tax positions for income tax returns subsequently filed in those jurisdictions.

Business Segment Information

Business Segment Information	9 Months Ended
	Sep. 30, 2021
Segment Reporting, Measurement Disclosures [Abstract]
Business Segment Information	BUSINESS SEGMENT INFORMATION We are a global provider of engineered services and products, primarily to the offshore energy industry. Through the use of our applied technology expertise, we also serve the defense, aerospace and commercial theme park industries. Our Energy Services and Products business leverages our asset base and capabilities for providing services and products predominantly for offshore energy operations, inclusive of the offshore renewable energy market. Our Energy Services and Products segments are: • Subsea Robotics — Our Subsea Robotics segment provides the following: ◦ ROVs for drilling support and vessel-based services, including subsea hardware installation, construction, pipeline inspection, survey and facilities inspection, maintenance and repair; ◦ ROV tooling; and ◦ survey services, including hydrographic survey and positioning services and autonomous underwater vehicles for geoscience. • Manufactured Products — Our Manufactured Products segment provides the following: ◦ distribution and connection systems including production control umbilicals and field development hardware and pipeline connection and repair systems to the energy industry; and AGV technology and entertainment systems to a variety of industries. • Offshore Projects Group — Our OPG segment provides the following: ◦ subsea installation and intervention, including riserless light well intervention services, inspection, maintenance and repair (“IMR”) services, principally in the U.S. Gulf of Mexico and offshore Angola, utilizing owned and chartered vessels; ◦ installation and workover control systems and ROV workover control systems; ◦ project management and engineering; and ◦ seabed preparation, route clearance and trenching services for submarine cables for the renewable energy markets. • Integrity Management & Digital Solutions — Our IMDS segment provides the following: ◦ asset integrity management services; ◦ software and analytical solutions for the bulk cargo maritime industry; and ◦ software, digital and connectivity solutions for the energy industry. Our Aerospace and Defense Technologies segment provides services and products include engineering and related manufacturing in defense and space exploration activities, principally to U.S. Government agencies and their prime contractors. Unallocated Expenses are those not associated with a specific business segment. These consist of expenses related to our incentive and deferred compensation plans, including restricted stock and bonuses, as well as other general expenses, including corporate administrative expenses. There are no differences in the basis of segmentation or in the basis of measurement of segment profit or loss from those used in our consolidated financial statements for the year ended December 31, 2020. The table that follows presents revenue, income (loss) from operations and depreciation and amortization expense by business segment: Three Months Ended Nine Months Ended (in thousands) Sep 30, 2021 Sep 30, 2020 Sep 30, 2021 Sep 30, 2020 Revenue Energy Services and Products Subsea Robotics $ 143,710 $ 119,617 $ 404,200 $ 378,621 Manufactured Products 75,359 110,416 241,311 377,520 Offshore Projects Group 95,580 73,212 292,765 221,306 Integrity Management & Digital Solutions 62,806 53,933 180,924 172,631 Total Energy Services and Products 377,455 357,178 1,119,200 1,150,078 Aerospace and Defense Technologies 89,359 82,565 283,366 253,549 Total $ 466,814 $ 439,743 $ 1,402,566 $ 1,403,627 Income (Loss) from Operations Energy Services and Products Subsea Robotics $ 19,533 $ 2,127 $ 55,862 $ (80,294) Manufactured Products 809 (38,198) 4,352 (100,471) Offshore Projects Group 7,634 (12,282) 24,443 (95,740) Integrity Management & Digital Solutions 5,362 793 12,557 (122,567) Total Energy Services and Products 33,338 (47,560) 97,214 (399,072) Aerospace and Defense Technologies 14,251 13,097 50,430 39,498 Unallocated Expenses (31,820) (26,157) (95,273) (86,985) Total $ 15,769 $ (60,620) $ 52,371 $ (446,559) Depreciation and Amortization, including Goodwill Impairment Energy Services and Products Subsea Robotics $ 21,483 $ 25,144 $ 66,871 $ 189,411 Manufactured Products 3,202 44,028 9,677 63,579 Offshore Projects Group 6,781 15,147 20,768 98,309 Integrity Management & Digital Solutions 1,114 866 3,329 125,966 Total Energy Services and Products 32,580 85,185 100,645 477,265 Aerospace and Defense Technologies 1,427 654 4,107 1,999 Unallocated Expenses 234 1,712 1,185 3,181 Total $ 34,241 $ 87,551 $ 105,937 $ 482,445 We determine Income (Loss) from Operations for each business segment before interest income or expense, other income (expense) and provision for income taxes. We do not consider an allocation of these items to be practical. Income (Loss) from Operations Three Months Ended September 30, 2021 and September 30, 2020 — During the three-month period ended 9/30/2021, there were no significant adjustments. During the three-month period ended September 30, 2020, we recorded adjustments attributable to each of our reporting segments as follows: For the Three Months Ended September 30, 2020 (in thousands) Subsea Robotics Manufactured Products OPG IMDS ADTech Unallocated Expenses Total Adjustments for the effects of: Long-lived assets write-offs $ — $ — $ 7,243 $ — $ — $ — $ 7,243 Inventory write-downs 7,038 — — — — — 7,038 Goodwill impairment — 40,875 — — — — 40,875 Other 2,535 2,559 5,326 83 545 — 11,048 Total adjustments for the three months ended September 30, 2020 $ 9,573 $ 43,434 $ 12,569 $ 83 $ 545 $ — $ 66,204 Nine Months Ended September 30, 2021 and September 30, 2020— During the nine-month periods ended September 30, 2021 and 2020, we recorded adjustments attributable to each of our reporting segments as follows: For the Nine Months Ended September 30, 2021 (in thousands) Subsea Robotics Manufactured Products OPG IMDS ADTech Unallocated Expenses Total Loss on sale of asset $ — $ — $ — $ — $ — $ 1,415 $ 1,415 Other 395 537 149 217 10 — 1,308 Total adjustments for the nine months ended September 30, 2021 $ 395 $ 537 $ 149 $ 217 $ 10 $ 1,415 $ 2,723 For the Nine Months Ended September 30, 2020 (in thousands) Subsea Robotics Manufactured Products OPG IMDS ADTech Unallocated Expenses Total Adjustments for the effects of: Long-lived assets impairments $ — $ 61,074 $ 7,522 $ 167 $ — $ — $ 68,763 Long-lived assets write-offs 7,328 — 7,243 — — — 14,571 Inventory write-downs 7,038 — — — — — 7,038 Goodwill impairment 102,118 52,263 66,285 123,214 — — 343,880 Other 4,834 5,755 7,947 3,850 545 455 23,386 Total adjustments for the nine months ended September 30, 2020 $ 121,318 $ 119,092 $ 88,997 $ 127,231 $ 545 $ 455 $ 457,638 Depreciation and Amortization, including Goodwill Impairment Depreciation expense on property and equipment, reflected in Depreciation and Amortization, including Goodwill Impairment in the table above, was $33 million and $36 million in the three-month periods ended September 30, 2021 and 2020, respectively, and $103 million and $117 million in the nine-month periods ended September 30, 2021 and 2020, respectively. Amortization expense on long-lived intangible assets, reflected in Depreciation and Amortization, including Goodwill Impairment in the table above, was $0.8 million and $3.5 million in the three-month periods ended September 30, 2021 and 2020, respectively, and $2.9 million and $6.9 million in the nine-month periods ended September 30, 2021 and 2020, respectively. Goodwill impairment expense, reflected in Depreciation and Amortization, including Goodwill Impairment in the table above, was $41 million and $344 million in the three- and nine-month periods ended September 30, 2020, respectively. For further information regarding goodwill impairment expense, see Note 4—“Impairments.”

Summary Of Major Accounting P_2

Summary Of Major Accounting Policies (Policy)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation . Oceaneering International, Inc. (“Oceaneering,” “we” or “us”) has prepared these unaudited consolidated financial statements pursuant to instructions for quarterly reports on Form 10-Q, which we are required to file with the United States Securities and Exchange Commission (the “SEC”). These financial statements do not include all information and footnotes normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”). These financial statements reflect all adjustments that we believe are necessary to present fairly our financial position as of September 30, 2021 and our results of operations and cash flows for the periods presented. Except as otherwise disclosed herein, all such adjustments are of a normal and recurring nature. These financial statements should be read in conjunction with the consolidated financial statements and related notes included in our annual report on Form 10-K for the year ended December 31, 2020. The results for interim periods are not necessarily indicative of annual results.
Principles of Consolidation	Principles of Consolidation. The consolidated financial statements include the accounts of Oceaneering and our 50% or more owned and controlled subsidiaries. We also consolidate entities that are determined to be variable interest entities if we determine that we are the primary beneficiary; otherwise, we account for those entities using the equity method of accounting. We use the equity method to account for our investments in unconsolidated affiliated companies of which we own an equity interest of between 20% and 50% and as to which we have significant influence, but not control, over operations. We use the cost method for all other long-term investments. Investments in entities that we do not consolidate are reflected on our balance sheet in other noncurrent assets. We eliminate intercompany transactions and accounts in consolidation.
Use Of Estimates	Use of Estimates. The preparation of financial statements in conformity with U.S. GAAP requires that our management make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expense during the reporting period. Actual results could differ from those estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents. Cash and cash equivalents include demand deposits and highly liquid investments with original maturities of three months or less from the date of investment.
Inventory	Inventory . Inventory is valued at the lower of cost or net realizable value. We determine cost using the weighted-average method. We periodically review the value of items in inventory and record write-downs or write-offs of inventory based on our assessment of market conditions. Write-downs and write-offs are charged to cost of services and products. We did not record any write-downs or write-offs of inventory in the three- and nine-month periods ended September 30, 2021, as compared to $7.0 million of write-downs and write-offs in the three- and nine-month periods ended September 30, 2020.
Foreign Currency Translations	Foreign Currency Translation. The functional currency for most of our foreign subsidiaries is the applicable local currency. Results of operations for foreign subsidiaries with functional currencies other than the U.S. dollar are translated into U.S. dollars using average exchange rates during the period. Assets and liabilities of these foreign subsidiaries are translated into U.S. dollars using the exchange rates in effect as of the balance sheet date, and the resulting translation adjustments are recognized, net of tax, in accumulated other comprehensive income (loss) as a component of shareholders' equity. All foreign currency transaction gains and losses are recognized currently in the Consolidated Statements of Operations. We recorded $(0.3) million and $(4.0) million of foreign currency transaction gains (losses) in the three- and nine-month periods ended September 30, 2021, respectively. We recorded $(2.5) million and $(13) million of foreign currency transaction gains (losses) in the three- and nine-month periods ended September 30, 2020, respectively. Those amounts are included as a component of other income (expense), net in our Consolidated Statement of Operations.
Revenue Recognition	Revenue Recognition. All our revenue is realized through contracts with customers. We recognize our revenue according to the contract type. On a daily basis, we recognize service revenue over time for contracts that provide for specific time, material and equipment charges, which we bill periodically, ranging from weekly to monthly. We use an input method to recognize revenue, because each day of service provided represents value to the customer. The performance obligations in these contracts are satisfied, and revenue is recognized, as the work is performed. When appropriate, we apply the practical expedient to recognize revenue for the amount invoiced when the invoice corresponds directly to the value of our performance to date. We account for significant fixed-price contracts, mainly relating to our Manufactured Products segment, and to a lesser extent in our Offshore Projects Group (“OPG”) and Aerospace and Defense Technologies (“ADTech”) segments, by recognizing revenue over time using an input, cost-to-cost measurement percentage-of-completion method. This commonly used method allows appropriate calculation of progress on our contracts. A performance obligation is satisfied as we create a product on behalf of the customer over the life of the contract. The remainder of our revenue is recognized at the point in time when control transfers to the customer, thus satisfying the performance obligation. We have elected to recognize the cost for freight and shipping as an expense when 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 us from customers, are excluded from revenue. In our service-based business lines, we principally charge on a dayrate basis for services provided. In our product-based business lines, predominantly in our Manufactured Products segment, we recognize revenue and profit using the percentage-of-completion method and exclude uninstalled materials and significant inefficiencies from the measure of progress. We apply judgment in the determination and allocation of transaction price to performance obligations, and the subsequent recognition of revenue, based on the facts and circumstances of each contract. We routinely review estimates related to our contracts and, when required, reflect revisions to profitability in earnings immediately. If an element of variable consideration has the potential for a significant future reversal of revenue, we will constrain that variable consideration to a level intended to remove the potential future reversal. If a current estimate of total contract cost indicates an ultimate loss on a contract, we recognize the projected loss in full when we determine it. During the three- and nine-month periods ended September 30, 2021, we recognized a projected loss of $2.1 million for a contract in our Subsea Robotics segment. We did not have any material adjustments during the three- and nine-month periods ended September 30, 2020. There could be significant adjustments to overall contract costs in the future, due to changes in facts and circumstances. In general, our payment terms consist of those services billed regularly as provided and those products delivered at a point in time, which are invoiced after the performance obligation is satisfied. Our product and service contracts with milestone payments due at agreed progress points during the contract are invoiced when those milestones are reached, which may differ from the timing of revenue recognition. Our payment terms generally do not provide financing of contracts to customers, nor do we receive financing from customers as a result of these terms. See Note 3—“Revenue” for more information on our revenue from contracts with customers.
Leases	Leases. We determine whether a contract is or contains a lease at inception, whether as a lessee or a lessor. We take into consideration the elements of an identified asset, right to control and the receipt of economic benefit in making those determinations. As a lessor, we lease certain types of equipment along with the provision of services and utilize the expedient allowing us to combine the lease and non-lease components into a combined component that is accounted for (1) under “ Leases ” ( “ ASC 842”), when the lease component is predominant, and (2) under the accounting standard “ Revenue from Contracts with Customers ” (“ASC 606”), when the service component is predominant. In general, when we have a service component, it is typically the predominant element and leads to accounting under ASC 606. As a lessor, we lease certain types of equipment, often providing services at the same time. These leases can be priced on a dayrate or lump-sum basis for periods ranging from a few days to multi-year contracts. These leases are negotiated on commercial terms at market rates and many carry standard options to extend or terminate at our customer's discretion. These leases generally do not contain options to purchase, material restrictions or covenants that impact our accounting for leases. As a lessee, we lease land, buildings, vessels and equipment for the operation of our business and to support some of our service line revenue streams. These generally carry lease terms that range from days for operational and support equipment to 15 years for land and buildings. These leases are negotiated on commercial terms at market rates and many carry standard options to extend or terminate at our discretion. When the exercise of those options is reasonably certain, we include them in the lease assessment. Our leases do not contain material restrictions or covenants that impact our accounting for them, nor do we provide residual value guarantees. As a lessee, we utilize the practical expedients to not recognize leases with an initial lease term of 12 months or less on the balance sheet and to combine lease and non-lease components together and account for the combined component as a lease for all asset classes, except real estate.
Impairment or Disposal of Long-Lived Assets, Policy	Property and Equipment, Long-Lived Intangible Assets and Right-of-Use Operating Lease Assets. We provide for depreciation of property and equipment on the straight-line method over estimated useful lives. We charge the costs of repair and maintenance of property and equipment to operations as incurred, and we capitalize the costs of improvements that extend asset lives or functionality. Upon the disposition of property and equipment, the related cost and accumulated depreciation accounts are relieved, and any resulting gain or loss is included as an adjustment to cost of services and products. We capitalize interest on assets where the construction period is anticipated to be more than three months. We did not capitalize interest in the three- and nine-month periods ended September 30, 2021 and 2020. We do not allocate general administrative costs to capital projects. Long-lived intangible assets, primarily acquired in connection with business combinations, include trade names, intellectual property and customer relationships and are being amortized over their respective estimated useful lives. Our management periodically, and upon the occurrence of a triggering event, reviews the realizability of our property and equipment, long-lived intangible assets and right-of-use operating lease assets to determine whether any events or changes in circumstances indicate that the carrying amounts of the assets may not be recoverable. For long-lived assets to be held and used, we base our evaluation on impairment indicators such as the nature of the assets, the future economic benefits of the assets, any historical or future profitability measurements and other external market conditions or factors that may be present. If such impairment indicators are present or other factors exist that indicate that the carrying amount of an asset may not be recoverable, we determine whether an impairment has occurred through the use of an undiscounted cash flows analysis of the asset at the lowest level for which identifiable cash flows exist. If an impairment has occurred, we recognize a loss for the difference between the carrying amount and the fair value of the asset. For information regarding write-downs and write-offs of property and equipment, long-lived intangible assets and right-of-use operating lease assets in the three- and nine-month periods ended September 30, 2020, see Note 4—“Impairments” and Note 10—“Business Segment Information.” We did not identify indicators of impairment for property and equipment, long-lived intangible assets and right-of-use operating lease assets for the three- and nine-month periods ended September 30, 2021. For assets held for sale or disposal, the fair value of the asset is measured using fair market value less estimated costs to sell. Assets are classified as held for sale when we have a plan for disposal of certain assets and those assets meet the held for sale criteria. For additional information regarding right-of-use operating lease assets, see “ Leases” below.
Goodwill and Intangible Assets, Goodwill, Policy	Goodwill. Our goodwill is evaluated for impairment annually and whenever we identify certain triggering events or circumstances that would more likely than not reduce the fair value of a reporting unit below its carrying amount. In our annual evaluation of goodwill, we perform a qualitative or quantitative impairment test. Under the qualitative approach, if we determine that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, we are required to perform the quantitative analysis to determine the fair value for the reporting unit. We then compare the fair value of the reporting unit with its carrying amount and recognize an impairment loss for the

Leases, Codification Topic 842

Leases, Codification Topic 842 (Policies)	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Leases	Leases. We determine whether a contract is or contains a lease at inception, whether as a lessee or a lessor. We take into consideration the elements of an identified asset, right to control and the receipt of economic benefit in making those determinations. As a lessor, we lease certain types of equipment along with the provision of services and utilize the expedient allowing us to combine the lease and non-lease components into a combined component that is accounted for (1) under “ Leases ” ( “ ASC 842”), when the lease component is predominant, and (2) under the accounting standard “ Revenue from Contracts with Customers ” (“ASC 606”), when the service component is predominant. In general, when we have a service component, it is typically the predominant element and leads to accounting under ASC 606. As a lessor, we lease certain types of equipment, often providing services at the same time. These leases can be priced on a dayrate or lump-sum basis for periods ranging from a few days to multi-year contracts. These leases are negotiated on commercial terms at market rates and many carry standard options to extend or terminate at our customer's discretion. These leases generally do not contain options to purchase, material restrictions or covenants that impact our accounting for leases. As a lessee, we lease land, buildings, vessels and equipment for the operation of our business and to support some of our service line revenue streams. These generally carry lease terms that range from days for operational and support equipment to 15 years for land and buildings. These leases are negotiated on commercial terms at market rates and many carry standard options to extend or terminate at our discretion. When the exercise of those options is reasonably certain, we include them in the lease assessment. Our leases do not contain material restrictions or covenants that impact our accounting for them, nor do we provide residual value guarantees. As a lessee, we utilize the practical expedients to not recognize leases with an initial lease term of 12 months or less on the balance sheet and to combine lease and non-lease components together and account for the combined component as a lease for all asset classes, except real estate.

Accounting Policies (Tables)

Accounting Policies (Tables)	3 Months Ended	9 Months Ended
	Jun. 30, 2020	Sep. 30, 2021
Accounting Policies [Abstract]
Schedule of Intangible Assets and Goodwill		The following table reflects goodwill impairments, as recorded in the three-month period ended March 31, 2020, and allocated, based on historical cost, to our new reporting segments: Three Months Ended March 31, 2020 (in thousands) As originally recorded As recast to reflect segment changes Segment/Reporting Unit Goodwill Impairment Subsea Robotics Manufactured Products OPG IMDS Total Subsea Products/ST&R $ 51,302 $ 17,457 $ — $ 33,845 $ — $ 51,302 Subsea Projects/Subsea Projects 129,562 84,661 — 32,440 12,461 129,562 Asset Integrity/Asset Integrity 110,753 — — — 110,753 110,753 Advanced Technologies/Commercial 11,388 — 11,388 — — 11,388 Total goodwill impairment $ 303,005 $ 102,118 $ 11,388 $ 66,285 $ 123,214 $ 303,005
Details of Impairment of Long-Lived Assets Held and Used by Asset	ong-lived asset impairments in the three-month period ended March 31, 2020, were realigned in our new reporting segments as follows: Three Months Ended March 31, 2020 (in thousands) As originally recorded As recast to reflect segment changes Segment/Reporting Unit Long-lived Asset Impairments Manufactured Products OPG IMDS Total Subsea Products Subsea Distribution Solutions U.K. $ 6,543 $ 6,543 $ — $ — $ 6,543 Subsea Distribution Solutions Brazil 9,834 9,834 — — 9,834 Subsea Distribution Solutions Angola 38,482 38,482 — — 38,482 Subsea Projects Shallow Water vessels 3,894 — 3,894 — 3,894 Renewables and Special Projects Group 3,628 — 3,628 — 3,628 Global Data Solutions 167 — — 167 167 Advanced Technologies Oceaneering Entertainment Systems 5,065 5,065 — — 5,065 Oceaneering AGV Systems 1,150 1,150 — — 1,150 Total long-lived asset impairments $ 68,763 $ 61,074 $ 7,522 $ 167 $ 68,763

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Revenue from External Customers by Products and Services	Three Months Ended Nine Months Ended (in thousands) Sep 30, 2021 Sep 30, 2020 Sep 30, 2021 Sep 30, 2020 Business Segment: Energy Services and Products Subsea Robotics $ 143,710 $ 119,617 $ 404,200 $ 378,621 Manufactured Products 75,359 110,416 241,311 377,520 Offshore Projects Group 95,580 73,212 292,765 221,306 Integrity Management & Digital Solutions 62,806 53,933 180,924 172,631 Total Energy Services and Products 377,455 357,178 1,119,200 1,150,078 Aerospace and Defense Technologies 89,359 82,565 283,366 253,549 Total $ 466,814 $ 439,743 $ 1,402,566 $ 1,403,627 Geographic Operating Areas: Foreign: Africa $ 78,890 $ 43,077 $ 213,087 $ 158,143 Norway 51,269 57,138 160,923 154,745 United Kingdom 46,254 68,568 135,401 191,781 Asia and Australia 43,919 30,715 123,616 113,517 Brazil 30,238 19,296 78,411 64,902 Other 22,912 22,071 69,183 69,355 Total Foreign 273,482 240,865 780,621 752,443 United States 193,332 198,878 621,945 651,184 Total $ 466,814 $ 439,743 $ 1,402,566 $ 1,403,627 Timing of Transfer of Goods or Services: Revenue recognized over time $ 437,086 $ 411,809 $ 1,316,733 $ 1,306,889 Revenue recognized at a point in time 29,728 27,934 85,833 96,738 Total $ 466,814 $ 439,743 $ 1,402,566 $ 1,403,627
Contract with Customer, Contract Asset, Contract Liability, and Receivable	The following table provides information about contract assets and contract liabilities from contracts with customers. Nine Months Ended (in thousands) Sep 30, 2021 Sep 30, 2020 Total contract assets, beginning of period $ 221,997 $ 221,288 Revenue accrued 1,355,567 1,271,033 Amounts billed (1,322,892) (1,271,561) Total contract assets, end of period $ 254,672 $ 220,760 Total contract liabilities, beginning of period $ 50,046 $ 117,342 Deferrals of milestone payments 47,246 46,223 Recognition of revenue for goods and services (46,538) (117,999) Total contract liabilities, end of period $ 50,754 $ 45,566

Selected Balance Sheet Inform_2

Selected Balance Sheet Information (Tables)	9 Months Ended
	Sep. 30, 2021
Balance Sheet Related Disclosures [Abstract]
Selected Balance Sheet Accounts	The following is information regarding selected balance sheet accounts: (in thousands) Sep 30, 2021 Dec 31, 2020 Inventory: Remotely operated vehicle parts and components $ 62,978 $ 62,788 Other inventory, primarily raw materials 65,891 78,453 Total $ 128,869 $ 141,241 Other current assets: Prepaid expenses $ 54,078 $ 48,616 Angolan bonds 6,665 10,179 Total $ 60,743 $ 58,795 Accrued liabilities: Payroll and related costs $ 130,555 $ 135,042 Accrued job costs 50,323 47,721 Income taxes payable 46,706 35,929 Current operating lease liability 20,008 18,798 Other 55,064 55,373 Total $ 302,656 $ 292,863

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Schedule of Debt	Long-term debt consisted of the following: (in thousands) Sep 30, 2021 Dec 31, 2020 4.650% Senior Notes due 2024 $ 436,990 $ 500,000 6.000% Senior Notes due 2028 300,000 300,000 Interest rate swap settlements 7,772 10,870 Unamortized debt issuance costs (4,782) (5,619) Long-term debt $ 739,980 $ 805,251

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Summary of Income Tax Examinations	The following table lists the earliest tax years open to examination by tax authorities where we have significant operations: Jurisdiction Periods United States 2014 United Kingdom 2019 Norway 2016 Angola 2013 Brazil 2016 Australia 2016

Business Segment Information (T

Business Segment Information (Tables)	9 Months Ended
	Sep. 30, 2021
Segment Reporting, Measurement Disclosures [Abstract]
Financial Data By Business Segment	The table that follows presents revenue, income (loss) from operations and depreciation and amortization expense by business segment: Three Months Ended Nine Months Ended (in thousands) Sep 30, 2021 Sep 30, 2020 Sep 30, 2021 Sep 30, 2020 Revenue Energy Services and Products Subsea Robotics $ 143,710 $ 119,617 $ 404,200 $ 378,621 Manufactured Products 75,359 110,416 241,311 377,520 Offshore Projects Group 95,580 73,212 292,765 221,306 Integrity Management & Digital Solutions 62,806 53,933 180,924 172,631 Total Energy Services and Products 377,455 357,178 1,119,200 1,150,078 Aerospace and Defense Technologies 89,359 82,565 283,366 253,549 Total $ 466,814 $ 439,743 $ 1,402,566 $ 1,403,627 Income (Loss) from Operations Energy Services and Products Subsea Robotics $ 19,533 $ 2,127 $ 55,862 $ (80,294) Manufactured Products 809 (38,198) 4,352 (100,471) Offshore Projects Group 7,634 (12,282) 24,443 (95,740) Integrity Management & Digital Solutions 5,362 793 12,557 (122,567) Total Energy Services and Products 33,338 (47,560) 97,214 (399,072) Aerospace and Defense Technologies 14,251 13,097 50,430 39,498 Unallocated Expenses (31,820) (26,157) (95,273) (86,985) Total $ 15,769 $ (60,620) $ 52,371 $ (446,559) Depreciation and Amortization, including Goodwill Impairment Energy Services and Products Subsea Robotics $ 21,483 $ 25,144 $ 66,871 $ 189,411 Manufactured Products 3,202 44,028 9,677 63,579 Offshore Projects Group 6,781 15,147 20,768 98,309 Integrity Management & Digital Solutions 1,114 866 3,329 125,966 Total Energy Services and Products 32,580 85,185 100,645 477,265 Aerospace and Defense Technologies 1,427 654 4,107 1,999 Unallocated Expenses 234 1,712 1,185 3,181 Total $ 34,241 $ 87,551 $ 105,937 $ 482,445

Summary Of Major Accounting P_3

Summary Of Major Accounting Policies Long-lived asset impairments (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2020USD ($)units	Sep. 30, 2020USD ($)
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 68,763	$ 68,763
S D S Rosyth
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	6,543
S D S Brazil
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	9,834
Subsea Products Angola
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	38,482
Ecosse
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	3,628
Global Data Solution
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	167
Oceaneering Entertainment System
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	5,065
Oceaneering A G V System
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	1,150
Subsea Projects [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	7,522
Subsea Products [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	61,074
Asset Integrity [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	167
Shallow Water
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 3,894
Measurement Input, Long-term Revenue Growth Rate
Impaired Long-Lived Assets Held and Used [Line Items]
Alternative Investment, Measurement Input | units	0.02
Maximum [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Alternative Investment, Measurement Input | units	0.15
Minimum [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Alternative Investment, Measurement Input | units	0.11
Minimum [Member] | Impaired Long-Lived Assets Held and Used, Asset Name [Domain]
Impaired Long-Lived Assets Held and Used [Line Items]
Alternative Investment, Measurement Input | units	0.12

Summary Of Major Accounting P_4

Summary Of Major Accounting Policies Goodwill Impairment (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Mar. 31, 2020USD ($)units	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)
Goodwill [Line Items]
Goodwill, impairment loss	$ 0	$ 40,875	$ 303,005	$ 0	$ 343,880
Measurement Input, Long-term Revenue Growth Rate
Goodwill [Line Items]
Alternative Investment, Measurement Input | units			0.02
Minimum [Member]
Goodwill [Line Items]
Alternative Investment, Measurement Input | units			0.11
Maximum [Member]
Goodwill [Line Items]
Alternative Investment, Measurement Input | units			0.15
Subsea Products
Goodwill [Line Items]
Goodwill, impairment loss			$ 51,302
Subsea Projects
Goodwill [Line Items]
Goodwill, impairment loss			129,562
Asset Integrity
Goodwill [Line Items]
Goodwill, impairment loss			110,753
Advanced Technologies
Goodwill [Line Items]
Goodwill, impairment loss			11,388
Remotely Operated Vehicles [Member]
Goodwill [Line Items]
Goodwill, impairment loss			102,118		102,118
Subsea Products [Member]
Goodwill [Line Items]
Goodwill, impairment loss		$ 40,875	11,388		52,263
Subsea Projects [Member]
Goodwill [Line Items]
Goodwill, impairment loss			66,285		66,285
Asset Integrity [Member]
Goodwill [Line Items]
Goodwill, impairment loss			$ 123,214		$ 123,214

Summary Of Major Accounting P_5

Summary Of Major Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Goodwill, impairment loss	$ 0	$ 40,875	$ 303,005	$ 0	$ 343,880
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts and Financing Receivable, Allowance for Credit Loss	1,500			1,500
Financing Receivable, Allowance for Credit Loss	800			800
Financing Receivable, Allowance for Credit Loss, Writeoff	100			3,100
Interest Receivable	1,300			$ 1,300		$ 1,500
Historical Credit Loss Analysis period				3 years
Foreign Currency Transaction Gain (Loss), before Tax	$ (300)	(2,500)		$ (4,000)	(13,000)
Inventory Write-down		$ 7,038			$ 7,038
Impairment of Ongoing Project				$ 2,100
Subsea Products
Property, Plant and Equipment [Line Items]
Goodwill, impairment loss			$ 51,302
Minimum [Member]
Property, Plant and Equipment [Line Items]
Threshold for consolidation, percentage	50.00%			50.00%
Equity method investment, threshold for consolidation, percentage	20.00%			20.00%
Maximum [Member]
Property, Plant and Equipment [Line Items]
Equity method investment, threshold for consolidation, percentage	50.00%			50.00%

Revenue - Disaggregation of Rev

Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenues	$ 466,814	$ 439,743	$ 1,402,566	$ 1,403,627
Transferred over Time
Segment Reporting Information [Line Items]
Revenues	437,086	411,809	1,316,733	1,306,889
Transferred at Point in Time
Segment Reporting Information [Line Items]
Revenues	29,728	27,934	85,833	96,738
Africa [Member]
Segment Reporting Information [Line Items]
Revenues	78,890	43,077	213,087	158,143
United Kingdom [Member]
Segment Reporting Information [Line Items]
Revenues	46,254	68,568	135,401	191,781
Norway [Member]
Segment Reporting Information [Line Items]
Revenues	51,269	57,138	160,923	154,745
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues	43,919	30,715	123,616	113,517
BRAZIL
Segment Reporting Information [Line Items]
Revenues	30,238	19,296	78,411	64,902
Other Geographical [Member]
Segment Reporting Information [Line Items]
Revenues	22,912	22,071	69,183	69,355
UNITED STATES
Segment Reporting Information [Line Items]
Revenues	193,332	198,878	621,945	651,184
Non-US [Member]
Segment Reporting Information [Line Items]
Revenues	273,482	240,865	780,621	752,443
Remotely Operated Vehicles [Member]
Segment Reporting Information [Line Items]
Revenues	143,710	119,617	404,200	378,621
Subsea Products [Member]
Segment Reporting Information [Line Items]
Revenues	75,359	110,416	241,311	377,520
Subsea Projects [Member]
Segment Reporting Information [Line Items]
Revenues	95,580	73,212	292,765	221,306
Asset Integrity [Member]
Segment Reporting Information [Line Items]
Revenues	62,806	53,933	180,924	172,631
Advanced Technologies [Member]
Segment Reporting Information [Line Items]
Revenues	89,359	82,565	283,366	253,549
Energy Services and Products
Segment Reporting Information [Line Items]
Revenues	$ 377,455	$ 357,178	$ 1,119,200	$ 1,150,078

Revenue - Revenue by Geographic

Revenue - Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue by Geographic Area [Line Items]
Revenues	$ 466,814	$ 439,743	$ 1,402,566	$ 1,403,627
Africa [Member]
Revenue by Geographic Area [Line Items]
Revenues	78,890	43,077	213,087	158,143
United Kingdom [Member]
Revenue by Geographic Area [Line Items]
Revenues	46,254	68,568	135,401	191,781
Norway [Member]
Revenue by Geographic Area [Line Items]
Revenues	51,269	57,138	160,923	154,745
Asia Pacific [Member]
Revenue by Geographic Area [Line Items]
Revenues	43,919	30,715	123,616	113,517
Brazil [Member]
Revenue by Geographic Area [Line Items]
Revenues	30,238	19,296	78,411	64,902
Other Geographical [Member]
Revenue by Geographic Area [Line Items]
Revenues	22,912	22,071	69,183	69,355
Non-US [Member]
Revenue by Geographic Area [Line Items]
Revenues	273,482	240,865	780,621	752,443
UNITED STATES
Revenue by Geographic Area [Line Items]
Revenues	$ 193,332	$ 198,878	$ 621,945	$ 651,184

Revenue - Revenue by Timing of

Revenue - Revenue by Timing of Transfer of Goods or Services (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Deferred Revenue Arrangement [Line Items]
Revenues	$ 466,814	$ 439,743	$ 1,402,566	$ 1,403,627
Transferred over Time
Deferred Revenue Arrangement [Line Items]
Revenues	437,086	411,809	1,316,733	1,306,889
Transferred at Point in Time
Deferred Revenue Arrangement [Line Items]
Revenues	$ 29,728	$ 27,934	$ 85,833	$ 96,738

Revenue - Contract balances (De

Revenue - Contract balances (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Increase (decrease) in unbilled receivables	$ (1,322,892)	$ (1,271,561)
Revenue recognized	(46,538)	(117,999)
Segment Reporting Information [Line Items]
Contract with Customer, Asset, before Allowance for Credit Loss, Current	254,672	220,760	$ 221,997	$ 221,288
Revenue from Contract with Customer, Excluding Assessed Tax	1,355,567	1,271,033
Contract liabilities	50,754	45,566	$ 50,046	$ 117,342
CustomerPaymentDeferrals	47,246	46,223
Revenue recognized	(46,538)	(117,999)
Increase (decrease) in unbilled receivables	$ (1,322,892)	$ (1,271,561)

Revenue - Performance obligatio

Revenue - Performance obligation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 221,000		$ 221,000
RevenueRecognitionforRemainingPerformanceObligationsinnext24months	102,000		102,000
Capitalized Contract Cost, Amortization	(1,200)	$ 1,500	(3,400)	$ 5,300
RevenueRecognitionforRemainingPerformanceObligationsinnext12months	$ 119,000		$ 119,000

Revenue - Costs to obtain or fu

Revenue - Costs to obtain or fulfill a contract (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Capitalized Contract Cost, Net	$ 8,100	$ 8,300

Selected Balance Sheet Inform_3

Selected Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Inventory:
Other inventory, primarily raw materials	$ 62,978	$ 62,788
Other Inventory, Net of Reserves	65,891	78,453
Total	128,869	141,241
Other current assets:
Prepaid expenses	54,078	48,616
Angolan bonds	6,665	10,179
Total	60,743	58,795
Accrued Liabilities:
Payroll and related costs	130,555	135,042
Deferred Credits and Other Liabilities, Current	50,323	47,721
Income taxes payable	46,706	35,929
Current operating lease liability	20,008	18,798
Other	55,064	55,373
Total	$ 302,656	$ 292,863

Debt - Schedule of Long-Term De

Debt - Schedule of Long-Term Debt (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Feb. 28, 2018	Nov. 30, 2014
Debt Instrument [Line Items]
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	$ 7,772,000			$ 7,772,000		$ 10,870,000
Unamortized debt issuance costs	(4,782,000)			(4,782,000)		(5,619,000)
Long-term Debt	739,980,000			739,980,000		805,251,000
Long-term Debt	739,980,000			739,980,000		805,251,000
Derivative, variable interest rate			2.823%
Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Adjustment			$ 13,000,000
Amortizationdeferredfinancecost	1,200,000	$ 600,000		3,100,000	$ 1,300,000
Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Senior notes	436,990,000			436,990,000		500,000,000		$ 500,000,000
Senior Notes due 2024 [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Derivative, variable interest rate			2.426%
Senior Notes due 2028 [Member]
Debt Instrument [Line Items]
Senior notes	$ 300,000,000			$ 300,000,000		$ 300,000,000	$ 300,000,000

Debt - Additional Information (

Debt - Additional Information (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2017	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Jun. 30, 2020	Feb. 28, 2018	Nov. 30, 2014	Oct. 31, 2014
Line of Credit Facility [Line Items]
Maximum capitalization ratio	55.00%			55.00%
Payments of financing costs			$ 3,000,000
Proceeds from sale of debt securities				$ 4,486,000	$ 0
Payments for (Proceeds from) Other Investing Activities				1,157,000	0
Payment for Debt Extinguishment or Debt Prepayment Cost				(63,010,000)
Other financing activities				(1,727,000)	(1,725,000)
Debt Instrument, Repurchased Face Amount	$ 63,000,000			63,000,000
Debt Instrument, Increase, Accrued Interest	400,000			700,000
Gain (Loss) on Repurchase of Debt Instrument	300,000			400,000
Amortizationdeferredfinancecost	1,200,000	$ 600,000		3,100,000	1,300,000
Write off of Deferred Debt Issuance Cost	600,000			1,200,000
Increase (Decrease) in Other Noncurrent Liabilities				(3,254,000)	(12,071,000)
Distributions of capital from unconsolidated affiliates				3,108,000	5,374,000
Debt Instrument, Repurchase Amount	33,000,000			33,000,000
Interest Rate Swap
Line of Credit Facility [Line Items]
Proceeds from sale of debt securities				$ 0	$ 12,840,000
Minimum [Member]
Line of Credit Facility [Line Items]
Commitment fee percentage				0.125%
Maximum [Member]
Line of Credit Facility [Line Items]
Commitment fee percentage				0.30%
Senior Notes due 2024 [Member]
Line of Credit Facility [Line Items]
Senior notes	436,990,000			$ 436,990,000		$ 500,000,000			$ 500,000,000
Interest rate, stated percentage									4.65%
Interest rate swap principal	200,000,000			200,000,000
Payments of debt issuance costs			6,900,000
Derivative Liability, Notional Amount							$ 100,000,000
Senior Notes due 2028 [Member]
Line of Credit Facility [Line Items]
Senior notes	$ 300,000,000			$ 300,000,000		$ 300,000,000		$ 300,000,000
Interest rate, stated percentage								6.00%
Payments of debt issuance costs			$ 4,200,000
Line of Credit [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity										$ 500,000,000
Available additional borrowing capacity										300,000,000
Face amount										$ 300,000,000
Percent of commitments affected by amendment								90.00%
Line of Credit [Member] | October 25, 2021 [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity								$ 500,000,000
Line of Credit [Member] | January 25, 2023 [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity								$ 450,000,000
Credit Agreement [Member] | Applicable Margin [Member] | Minimum [Member] | Adjusted Base Rate Advances [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.125%			0.125%
Credit Agreement [Member] | Applicable Margin [Member] | Minimum [Member] | Eurodollar Advances [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.125%			1.125%
Credit Agreement [Member] | Applicable Margin [Member] | Maximum [Member] | Adjusted Base Rate Advances [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.75%			0.75%
Credit Agreement [Member] | Applicable Margin [Member] | Maximum [Member] | Eurodollar Advances [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.75%			1.75%
Credit Agreement [Member] | Adjusted Base Rate [Member] | Minimum [Member] | Adjusted Base Rate Advances [Member] | Federal Funds Rate [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%			0.50%
Credit Agreement [Member] | Adjusted Base Rate [Member] | Minimum [Member] | Adjusted Base Rate Advances [Member] | Eurodollar Rate [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%			1.00%

Leases - Lessee Disclosure, Bal

Leases - Lessee Disclosure, Balance Sheet Disclosure (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets:
Operating lease assets	$ 145,771	$ 141,206
Current
Operating	20,008	18,798
Noncurrent
Operating	$ 157,510	$ 156,074

Leases - Lessee Disclosure, Mat

Leases - Lessee Disclosure, Maturity of Lease Liabilities (Details)	9 Months Ended
	Sep. 30, 2021
Maximum [Member]
Operating Lease and Lease Term [Line Items]
OperatingLeasesOperatingLeaseTerm	15 years

Commitments And Contingencies -

Commitments And Contingencies - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Jun. 30, 2020
Loss Contingencies [Line Items]
Notes payable, fair value disclosure	$ 760,000,000		$ 760,000,000
Derivative, variable interest rate						2.823%
Other income (expense), net	814,000	$ 2,836,000	4,222,000	$ 13,624,000
Proceeds from sale of debt securities			4,486,000	0
Foreign Currency Transaction Gain (Loss), before Tax	(300,000)	(2,500,000)	(4,000,000)	(13,000,000)
Debt Securities, Available-for-sale, Realized Gain			500,000
Debt Securities, Available-for-sale, Unrealized Gain			400,000
Angolan bonds	6,665,000		6,665,000		$ 10,179,000
Revenue, Remaining Performance Obligation, Amount	221,000,000		221,000,000
Trade Accounts Receivable
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	37,000,000		37,000,000
Subsea Products [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	73,000,000		73,000,000
Bonds
Loss Contingencies [Line Items]
Proceeds from sale of debt securities			4,500,000
Angola, Kwanza [Member]
Loss Contingencies [Line Items]
Cash and cash equivalents	3,500,000		3,500,000		4,700,000
Foreign Currency Transaction Gain (Loss), before Tax	900,000	100,000	(1,000,000)	(2,200,000)
Brazil, Brazil Real
Loss Contingencies [Line Items]
Foreign Currency Transaction Gain (Loss), before Tax	100,000	$ (700,000)	(100,000)	$ (8,400,000)
ANGOLA
Loss Contingencies [Line Items]
Angolan bonds	6,700,000		6,700,000		10,000,000
CHINA
Loss Contingencies [Line Items]
Revenue, Remaining Performance Obligation, Amount	38,000,000		38,000,000
CHINA | Accounts Receivable
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	38,000,000		38,000,000		$ 40,000,000
CHINA | Trade Accounts Receivable
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	11,000,000		11,000,000
Senior Notes due 2024 [Member]
Loss Contingencies [Line Items]
Interest rate swap principal	$ 200,000,000		$ 200,000,000
Senior Notes due 2024 [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Derivative, variable interest rate						2.426%

Earnings (Loss) Per Share, St_2

Earnings (Loss) Per Share, Stock-Based Compensation and Share Repurchase Plan (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020	Dec. 31, 2015	Dec. 31, 2014
Shareholders' Equity, Earnings Per Share And Stock-Based Compensation [Line Items]
Award vesting period	3 years
Number outstanding (in shares)	2,476,614	1,955,346
Number of shares authorized to be repurchased (in shares)				10,000,000
Total number of shares repurchased to date (in shares)			2,000,000
Stock Repurchase Program, Authorized Amount			$ 100
Restricted Stock Units (RSUs) [Member]
Shareholders' Equity, Earnings Per Share And Stock-Based Compensation [Line Items]
Compensation cost not yet recognized	$ 14

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Probability threshold	50.00%
Income Tax Examination [Line Items]
Income Taxes Receivable	$ 33
Proceeds from Income Tax Refunds	10
NoncashIncomeTaxBenefit	8.4
Liability for Uncertainty in Income Taxes, Noncurrent	$ 14,000,000	$ 15,000,000

Income Taxes - Summary Of Earli

Income Taxes - Summary Of Earliest Tax Years Open To Examination (Details)	9 Months Ended
	Sep. 30, 2021
United States [Member]
Income Tax Examination [Line Items]
Earliest tax years open to examination by tax authorities	2014
United Kingdom [Member]
Income Tax Examination [Line Items]
Earliest tax years open to examination by tax authorities	2019
Norway [Member]
Income Tax Examination [Line Items]
Earliest tax years open to examination by tax authorities	2016
ANGOLA
Income Tax Examination [Line Items]
Earliest tax years open to examination by tax authorities	2013
BRAZIL
Income Tax Examination [Line Items]
Earliest tax years open to examination by tax authorities	2016
AUSTRALIA
Income Tax Examination [Line Items]
Earliest tax years open to examination by tax authorities	2016

Business Segment Information -

Business Segment Information - Financial Data By Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenue	$ 466,814	$ 439,743		$ 1,402,566	$ 1,403,627
Income (Loss) from Operations	15,769	(60,620)		52,371	(446,559)
Depreciation and amortization, including goodwill impairment	34,241	87,551		105,937	482,445
Other adjustments to Income from continuing operations		11,048		1,308	23,386
Total adjustments to Income from continuing operations		66,204		2,723	457,638
Impairment of Long-Lived Assets Held-for-use			$ 68,763		68,763
Impaired Assets to be Disposed of by Method Other than Sale, Amount of Impairment Loss		7,243			14,571
Inventory Write-down		7,038			7,038
Goodwill, impairment loss	0	40,875	303,005	0	343,880
Amortization of Intangible Assets	800	3,500		2,900	6,900
Depreciation	33,000	36,000		103,000	117,000
Gain (Loss) on Disposition of Other Assets				1,415
Depreciation	33,000	36,000		103,000	117,000
Remotely Operated Vehicles [Member]
Segment Reporting Information [Line Items]
Revenue	143,710	119,617		404,200	378,621
Income (Loss) from Operations	19,533	2,127		55,862	(80,294)
Other adjustments to Income from continuing operations		2,535		395	4,834
Impaired Assets to be Disposed of by Method Other than Sale, Amount of Impairment Loss					7,328
Inventory Write-down		7,038			7,038
Goodwill, impairment loss			102,118		102,118
Subsea Projects [Member]
Segment Reporting Information [Line Items]
Revenue	95,580	73,212		292,765	221,306
Income (Loss) from Operations	7,634	(12,282)		24,443	(95,740)
Depreciation and amortization, including goodwill impairment	6,781	15,147		20,768	98,309
Other adjustments to Income from continuing operations		5,326		149	7,947
Total adjustments to Income from continuing operations		12,569		149	88,997
Impairment of Long-Lived Assets Held-for-use					7,522
Impaired Assets to be Disposed of by Method Other than Sale, Amount of Impairment Loss		7,243			7,243
Goodwill, impairment loss			66,285		66,285
Asset Integrity [Member]
Segment Reporting Information [Line Items]
Revenue	62,806	53,933		180,924	172,631
Income (Loss) from Operations	5,362	793		12,557	(122,567)
Depreciation and amortization, including goodwill impairment	1,114	866		3,329	125,966
Other adjustments to Income from continuing operations		83		217	3,850
Total adjustments to Income from continuing operations		83		217	127,231
Impairment of Long-Lived Assets Held-for-use					167
Goodwill, impairment loss			123,214		123,214
Subsea Products [Member]
Segment Reporting Information [Line Items]
Revenue	75,359	110,416		241,311	377,520
Income (Loss) from Operations	809	(38,198)		4,352	(100,471)
Depreciation and amortization, including goodwill impairment	3,202	44,028		9,677	63,579
Other adjustments to Income from continuing operations		2,559		537	5,755
Total adjustments to Income from continuing operations		43,434		537	119,092
Impairment of Long-Lived Assets Held-for-use					61,074
Goodwill, impairment loss		40,875	$ 11,388		52,263
Advanced Technologies [Member]
Segment Reporting Information [Line Items]
Revenue	89,359	82,565		283,366	253,549
Income (Loss) from Operations	14,251	13,097		50,430	39,498
Depreciation and amortization, including goodwill impairment	1,427	654		4,107	1,999
Other adjustments to Income from continuing operations		545		10	545
Total adjustments to Income from continuing operations		545		10	545
Unallocated Expenses [Member]
Segment Reporting Information [Line Items]
Income (Loss) from Operations	(31,820)	(26,157)		(95,273)	(86,985)
Depreciation, Depletion and Amortization	234	1,712		1,185	3,181
Energy Services and Products Member
Segment Reporting Information [Line Items]
Revenue	377,455
Energy Services and Products
Segment Reporting Information [Line Items]
Revenue	377,455	357,178		1,119,200	1,150,078
Income (Loss) from Operations	33,338	(47,560)		97,214	(399,072)
Depreciation and amortization, including goodwill impairment	32,580	85,185		100,645	477,265
Subsea Robotics Member
Segment Reporting Information [Line Items]
Depreciation and amortization, including goodwill impairment	$ 21,483	25,144		66,871	189,411
Total adjustments to Income from continuing operations		9,573		395	121,318
Unallocated Expense Member
Segment Reporting Information [Line Items]
Other adjustments to Income from continuing operations					455
Total adjustments to Income from continuing operations		$ 0		1,415	$ 455
Gain (Loss) on Disposition of Other Assets				$ 1,415