SEACOR Marine (SMHI) 10-Q 2 Nov 22 2022 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2022	Oct. 28, 2022
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Trading Symbol	SMHI
Entity Registrant Name	SEACOR Marine Holdings Inc.
Entity Central Index Key	0001690334
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Common Stock, Shares Outstanding		26,702,161
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	1-37966
Entity Tax Identification Number	47-2564547
Entity Address, Address Line One	12121 Wickchester Lane
Entity Address, Address Line Two	Suite 500
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77079
City Area Code	346
Local Phone Number	980-1700
Entity Incorporation, State or Country Code	DE
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common stock
Security Exchange Name	NYSE
Document Quarterly Report	true
Document Transition Report	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 47,514	$ 37,619
Restricted cash	3,296	3,601
Receivables:
Trade, net of allowance for credit loss accounts of $1,639 and $1,312 in 2022 and 2021, respectively	58,572	55,544
Other	6,647	6,118
Note receivable	20,000	0
Tax receivable	79	1,238
Inventories	2,059	928
Prepaid expenses and other	4,700	3,730
Assets held for sale	6,000	2,235
Total current assets	148,867	111,013
Property and Equipment:
Historical cost	992,423	1,008,080
Accumulated depreciation	(321,898)	(302,328)
Property and equipment	670,525	705,752
Construction in progress	8,422	15,531
Net property and equipment	678,947	721,283
Right-of-use asset - operating leases	4,419	6,608
Right-of-use asset - finance leases	6,972	100
Investments, at equity, and advances to 50% or less owned companies	1,901	71,727
Other assets	1,887	1,771
Total assets	842,993	912,502
Current Liabilities:
Current portion of operating lease liabilities	1,792	1,986
Current portion of financing lease liabilities	374	33
Current portion of long-term debt:
Recourse	57,567	31,602
Accounts payable and accrued expenses	36,248	28,419
Due to SEACOR Holdings	264	274
Accrued wages and benefits	3,112	3,711
Accrued interest	2,988	2,273
Deferred revenue and unearned revenue	827	1,606
Accrued capital, repair, and maintenance expenditures	6,779	2,438
Accrued insurance deductibles and premiums	2,205	2,720
Accrued professional fees	2,580	1,214
Derivatives	0	1,831
Other current liabilities	3,541	6,558
Total current liabilities	118,277	84,665
Long-term operating lease liabilities	3,759	4,885
Long-term financing lease liabilities	6,916	76
Long-term Debt:
Recourse	277,100	327,300
Non-recourse	5,456	5,462
Deferred income taxes	39,823	40,682
Deferred gains and other liabilities	2,692	2,891
Total liabilities	454,023	465,961
SEACOR Marine Holdings Inc. stockholders’ equity:
Common stock, $.01 par value, 60,000,000 shares authorized; 26,950,799 and 26,120,124 shares issued in 2022 and 2021, respectively	272	262
Additional paid-in capital	465,449	461,931
Accumulated deficit	(79,769)	(22,907)
Shares held in treasury of 248,638 and 127,887, respectively, at cost	(1,852)	(1,120)
Accumulated other comprehensive income, net of tax	4,549	8,055
Total stockholders equity	388,649	446,221
Noncontrolling interests in subsidiaries	321	320
Total equity	388,970	446,541
Total liabilities and equity	$ 842,993	$ 912,502

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Statement Of Financial Position [Abstract]
Trade receivables, allowance for credit loss	$ 1,639	$ 1,312
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	60,000,000	60,000,000
Common stock, shares issued (in shares)	26,950,799	26,120,124
Shares held in treasury (in shares)	248,638	127,887

Unaudited Condensed Consolidate

Unaudited Condensed Consolidated Statements of Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Operating Revenues	$ 59,791	$ 43,663	$ 159,399	$ 122,974
Costs and Expenses:
Operating	44,006	33,448	127,647	92,370
Administrative and general	9,978	9,134	30,112	26,897
Lease expense	1,168	1,109	3,236	3,421
Depreciation and amortization	13,754	14,306	42,333	43,197
Costs and expenses	68,906	57,997	203,328	165,885
(Losses) Gains on Asset Dispositions and Impairments, Net	(1,783)	56	381	20,436
Operating Loss	(10,898)	(14,278)	(43,548)	(22,475)
Other Income (Expense):
Interest income	(123)	124	96	1,245
Interest expense	(7,634)	(6,403)	(21,250)	(21,731)
SEACOR Holdings guarantee fees	0	0	0	(7)
Gain on debt extinguishment	0	0	0	61,994
Derivative gains, net	1	2	0	387
Foreign currency gains (losses), net	2,314	245	4,305	(878)
Gain from return of investments in 50% or less owned companies and other, net	659	9,442	618	9,441
Nonoperating income expense	(4,783)	3,410	(16,231)	50,451
(Loss) Income from Continuing Operations Before Income Tax Expense (Benefit) and Equity in Earnings of 50% or Less Owned Companies	(15,681)	(10,868)	(59,779)	27,976
Income Tax Expense (Benefit)	8,418	(725)	4,363	12,502
(Loss) Income from Continuing Operations Before Equity in Earnings of 50% or Less Owned Companies	(24,099)	(10,143)	(64,142)	15,474
Equity in Earnings (Losses) Gains of 50% or Less Owned Companies	(254)	4,314	5,835	10,584
(Loss) Income from Continuing Operations	(24,353)	(5,829)	(58,307)	26,058
Income on Discontinued Operations, Net of Tax (see Note 13)	0	0	0	22,925
Net (Loss) Income	(24,353)	(5,829)	(58,307)	48,983
Net (Loss) Income attributable to Noncontrolling Interests in Subsidiaries	(2)	0	1	1
Net (Loss) Income attributable to SEACOR Marine Holdings Inc.	$ (24,351)	$ (5,829)	$ (58,308)	$ 48,982
Net (Loss) Income Per Common Share from Continuing Operations:
Basic	$ (0.91)	$ (0.23)	$ (2.19)	$ 1.03
Diluted	(0.91)	(0.23)	(2.19)	1.02
Net Earnings Per Share from Discontinued Operations:
Basic	0	0	0	0.90
Diluted	0	0	0	0.90
Net (Loss) Earnings Per Share:
Basic	(0.91)	(0.23)	(2.19)	1.93
Diluted	$ (0.91)	$ (0.23)	$ (2.19)	$ 1.92
Weighted Average Common Stock and Warrants Outstanding:
Basic	26,727,864	25,515,569	26,591,911	25,419,303
Diluted	26,727,864	25,515,569	26,591,911	25,430,762

Unaudited Condensed Consolida_2

Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net (Loss) Income	$ (24,353)	$ (5,829)	$ (58,307)	$ 48,983
Other Comprehensive Income:
Foreign currency translation (losses) gains	(2,154)	(504)	(6,717)	3,818
Derivative gains (losses) on cash flow hedges	365	(54)	1,521	(22)
Other comprehensive income (loss)	(1,411)	(63)	(3,506)	4,254
Comprehensive (Loss) Income	(25,764)	(5,892)	(61,813)	53,237
Comprehensive (Loss) Income Attributable to Noncontrolling Interests in Subsidiaries	(2)	0	1	1
Comprehensive (Loss) Income Attributable to SEACOR Marine Holdings Inc.	(25,762)	(5,892)	(61,814)	53,236
Interest Expense
Other Comprehensive Income:
Reclassification of derivative losses on cash flow hedges	112	415	749	1,245
Equity Method Investments
Other Comprehensive Income:
Reclassification of derivative losses on cash flow hedges	$ 266	$ 80	$ 941	$ (787)

Unaudited Condensed Consolida_3

Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement Of Income And Comprehensive Income [Abstract]
Reclassification of derivative losses on cash flow hedges to equity in earnings	50%	50%	50%	50%

Unaudited Condensed Consolida_4

Unaudited Condensed Consolidated Statements of Changes In Equity - USD ($) $ in Thousands	Total	Director [Member]	Common Stock [Member]	Common Stock [Member] Director [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member] Director [Member]	Treasury Stock [Member]	Treasury Stock [Member] Director [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]	Non-Controlling Interests In Subsidiaries [Member]
Balance at Dec. 31, 2020	$ 401,836		$ 235		$ 451,179		$ (848)		$ (51,839)	$ 2,790	$ 319
Balance (in shares) at Dec. 31, 2020			23,430,766				73,284
Restricted stock grants	8		$ 8
Restricted stock grants (in shares)			815,550
Amortization of share awards	3,759				3,759
Restricted stock vesting	(272)						$ (272)
Restricted stock vesting (in shares)			(54,454)				54,454
Director share awards		$ 437		$ 2		$ 435
Director share awards (in shares)				189,030
Forfeiture of employee share awards (in shares)			(5,250)
Sale Of Windcat Workboats	(4,202)								(4,202)
Net loss (income)	48,983								48,982		1
Other comprehensive income (loss)	4,254									4,254
Balance at Sep. 30, 2021	454,803		$ 245		455,373		$ (1,120)		(7,059)	7,044	320
Balance (in shares) at Sep. 30, 2021			24,375,642				127,738
Balance at Jun. 30, 2021	459,401		$ 245		454,079		$ (1,120)		(1,230)	7,107	320
Balance (in shares) at Jun. 30, 2021			24,380,892				127,738
Amortization of share awards	1,294				1,294
Forfeiture of employee share awards (in shares)			(5,250)
Net loss (income)	(5,829)								(5,829)
Other comprehensive income (loss)	(63)									(63)
Balance at Sep. 30, 2021	454,803		$ 245		455,373		$ (1,120)		(7,059)	7,044	320
Balance (in shares) at Sep. 30, 2021			24,375,642				127,738
Balance at Dec. 31, 2021	$ 446,541		$ 262		461,931		$ (1,120)		(22,907)	8,055	320
Balance (in shares) at Dec. 31, 2021	26,120,124		25,992,237				127,887
Restricted stock grants	$ 9		$ 9
Restricted stock grants (in shares)			738,896
Amortization of share awards	3,367				3,367
Exercise of options	$ 151				151
Exercise of options (in shares)	34,492		34,492
Restricted stock vesting	$ (672)	(60)					$ (672)	$ (60)
Restricted stock vesting (in shares)	(120,751)		(114,251)	(6,500)			114,251	6,500
Director share awards		$ 1		$ 1
Director share awards (in shares)				60,787
Forfeiture of employee share awards (in shares)			(3,500)
Net loss (income)	$ (58,307)								(58,308)		1
Other comprehensive income (loss)	(2,060)								1,446	(3,506)
Balance at Sep. 30, 2022	$ 388,970		$ 272		465,449		$ (1,852)		(79,769)	4,549	321
Balance (in shares) at Sep. 30, 2022	26,950,799		26,702,161				248,638
Balance at Jun. 30, 2022	$ 413,507		$ 272		464,222		$ (1,852)		(55,418)	5,960	323
Balance (in shares) at Jun. 30, 2022			26,705,661				248,638
Amortization of share awards	1,227				1,227
Forfeiture of employee share awards (in shares)			(3,500)
Net loss (income)	(24,353)								(24,351)		(2)
Other comprehensive income (loss)	(1,411)									(1,411)
Balance at Sep. 30, 2022	$ 388,970		$ 272		$ 465,449		$ (1,852)		$ (79,769)	$ 4,549	$ 321
Balance (in shares) at Sep. 30, 2022	26,950,799		26,702,161				248,638

Unaudited Condensed Consolida_5

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021
Cash Flows from Continuing Operating Activities:
Net (Loss) Income		$ 58,307	$ (48,983)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization		42,333	43,197
Deferred financing costs amortization		1,005	769
Stock-based compensation expense		2,635	3,922
Debt discount amortization		5,244	5,252
Allowance for credit losses		477	278
Gain from equipment sales, retirements or impairments		(381)	(20,436)
Gain on the sale of Windcat Workboats		0	(22,756)
Gain from return of investments in 50% or less owned companies		0	(9,442)
Gain on debt extinguishment		0	(62,749)
Derivative gains		0	(387)
Interest on finance leases		171	3
Cash settlement payments on derivative transactions, net		(782)	(1,747)
Currency (gains) losses		4,305	(878)
Deferred income taxes		(860)	7,641
Equity earnings		(5,835)	(10,584)
Dividends received from equity investees		2,983	4,515
Changes in Operating Assets and Liabilities:
Accounts receivables		(2,955)	23,594
Other assets		(737)	1,457
Accounts payable and accrued liabilities		6,732	(7,444)
Net cash (used in) provided by operating activities		(12,582)	4,944
Cash Flows from Continuing Investing Activities:
Purchases of property and equipment		(277)	(6,560)
Proceeds from disposition of property and equipment		6,681	30,137
Proceeds from sale of Windcat Workboats, net of transaction costs and cash sold	[1]	0	38,715
Investments in and advances to 50% or less owned companies		0	(736)
Excess distributions from equity investees		0	9,442
Principal payments on notes due from equity investees		528	3,975
Proceeds from sale of investment in equity investees		66,000	0
Issuance of notes due from others		(28,831)	0
Principal payments on notes due from others		8,831	0
Net cash provided by investing activities		52,932	74,973
Cash Flows from Continuing Financing Activities:
Payments on long-term debt		(30,682)	(72,143)
Payments on debt extinguishment cost		0	(755)
Payments on finance leases		(237)	(21)
Proceeds from exercise of stock options		151	0
Issuance of stock		10	10
Net cash used in financing activities		(30,758)	(72,909)
Effects of Exchange Rate Changes on Cash and Cash Equivalents		(2)	(21)
Net Change in Cash, Restricted Cash and Cash Equivalents		9,590	6,987
Cash Flows from Discontinued Operations:
Operating Activities		0	(171)
Investing Activities		0	0
Financing Activities		0	0
Net Change in Cash, Restricted Cash and Cash Equivalents on Discontinued Operations		0	(171)
Net Change in Cash, Restricted Cash and Cash Equivalents		9,590	6,816
Cash, Restricted Cash and Cash Equivalents, Beginning of Period		41,220	39,538
Cash, Restricted Cash and Cash Equivalents, End of Period		50,810	46,354
Supplemental disclosures:
Cash paid for interest, excluding capitalized interest		14,286	15,231
Income taxes refunded, net		886	32,759
Noncash Investing and Financing Activities:
Increase in long-term debt related to asset purchases		0	6,500
Decrease in debt related to debt settlement		0	62,749
Decrease in capital expenditures in accounts payable and accrued liabilities		0	10,379
Exchange of property and equipment		8,918	0
Recognition of a new right-of-use asset - operating leases		163	955
Recognition of a new right-of-use asset - financing leases		$ 7,248	$ 0
[1] Refer to Note 2. Equipment Acquisitions and Dispositions for a reconciliation of the cash received from the sale of Windcat Workboats.

Basis of Presentation and Accou

Basis of Presentation and Accounting Policies	9 Months Ended
	Sep. 30, 2022
Basis Of Presentation And Accounting Policies [Abstract]
Basis of Presentation and Accounting Policies	1. The condensed consolidated financial statements include the accounts of SEACOR Marine Holdings Inc. and its consolidated subsidiaries (the “Company”). In the opinion of management, all adjustments (consisting of normal recurring adjustments) have been made to fairly present the unaudited condensed consolidated financial statements for the periods indicated. Results of operations for the interim periods presented are not necessarily indicative of operating results for the full year or any future periods. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) have been condensed or omitted. These condensed consolidated financial statements should be read in conjunction with the Company’s financial statements and related notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021 (the “2021 Annual Report”). Unless the context otherwise indicates, any reference in this Quarterly Report on Form 10-Q to the “Company” refers to SEACOR Marine Holdings Inc. and its consolidated subsidiaries, and any reference in this Quarterly Report on Form 10-Q to “SEACOR Marine” refers to SEACOR Marine Holdings Inc. without its consolidated subsidiaries. Recently Adopted Accounting Standards. On October 29, 2020, the FASB issued ASU 2020-10, Codification Improvements: Amendments that improve the consistency of the Codification by including all disclosure guidance in the appropriate Disclosure section. The guidance was effective for annual periods beginning after December 15, 2020, and interim periods within the annual periods beginning after December 15, 2022. The adoption of the standard did not have a material effect on the disclosures included herein. On August 5, 2020, the FASB issued ASU 2020-06, Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which simplifies the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts on an entity’s own equity. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2021. The Company adopted the new standard on January 1, 2022. The adoption of the standard by the Company did not have a material impact on its consolidated financial position or on its results of operations, cash flows and disclosures. On December 18, 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The adoption of the standard by the Company did not have a material impact on its consolidated financial position or on its results of operations and cash flows. Recently Issued Accounting Standards On March 12, 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides temporary optional guidance to ease the potential burden in accounting for reference rate reform. The new guidance provides optional expedients and exceptions for applying generally accepted accounting principles to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. The ASU is intended to help stakeholders during the global market-wide reference rate transition period and it will be in effect for a limited time through December 31, 2022. As of September 30, 2022, the reference rates for the Company’s SEACOR 88/888 Term Loan Facility and Tranche B under the SEACOR Marine Foreign Holdings Credit Facility have transitioned from the London interbank offered rate (“LIBOR”) to the secured overnight financing rate (“SOFR”) (see “ Note 5 . Long-Term Debt”) . [ The se reference rate transitions by the Company did not have a material impact on its consolidated financial position or on its results of operations and cash flows .] The reference rates for the Company’s other existing debt and interest rate swaps have not changed as a result of any amendment. The Company will continue to monitor changes to reference rates in the remaining applicable agreements and a pply the standard as needed. Critical Accounting Policies. Basis of Consolidation. The consolidated financial statements include the accounts of SEACOR Marine and its controlled subsidiaries. Control is generally deemed to exist if the Company has greater than 50% of the voting rights of a subsidiary. All significant intercompany accounts and transactions are eliminated in the combination and consolidation. Noncontrolling interests in consolidated subsidiaries are included in the consolidated balance sheets as a separate component of equity. The Company reports consolidated net income (loss) inclusive of both the Company’s and the noncontrolling interests’ share, as well as the amounts of consolidated net income (loss) attributable to each of the Company and the noncontrolling interests. If a subsidiary is deconsolidated upon a change in control, any retained noncontrolling equity investment in the former controlled subsidiary is measured at fair value and a gain or loss is recognized in net income (loss) based on such fair value. If a subsidiary is consolidated upon the business acquisition of controlling interests by the Company, any previous noncontrolled equity investment in the subsidiary is measured at fair value and a gain or loss is recognized in net income (loss) based on such fair value. The Company employs the equity method of accounting for investments in 50% or less owned companies that it does not control but has the ability to exercise significant influence over the operating and financial policies of the business venture. Significant influence is generally deemed to exist if the Company has between 20% and 50% of the voting rights of a business venture but may exist when the Company’s ownership percentage is less than 20%. In certain circumstances, the Company may have an economic interest in excess of 50% but may not control and consolidate the business venture. Conversely, the Company may have an economic interest less than 50% but may control and consolidate the business venture. The Company reports its investments in and advances to these business ventures in the accompanying consolidated balance sheets as investments, at equity, and advances to 50% or less owned companies. The Company reports its share of earnings from investments in 50% or less owned companies in the accompanying consolidated statements of income (loss) as equity in earnings of 50% or less owned companies, net of tax. Certain reclassifications were made to previously reported amounts in the consolidated financial statements and notes thereto to make them consistent with the current period presentation. Use of Estimates. The preparation of financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Such estimates include those related to deferred revenues, allowance for credit loss accounts, useful lives of property and equipment, impairments, income tax provisions and certain accrued liabilities. Actual results could differ from estimates and those differences may be material. Revenue Recognition . Revenue is recognized when (or as) the Company transfers promised goods or services to its customers in amounts that reflect the consideration to which the Company expects to be entitled to in exchange for those goods or services, which occurs when (or as) the Company satisfies its contractual obligations and transfers over control of the promised goods or services to its customers. The Company recognizes revenue, net of sales taxes, based on its estimates of the consideration the Company expects to receive. Costs to obtain or fulfill a contract are expensed as incurred. The Company earns revenue primarily from the time charter and bareboat charter of vessels to customers. Since the Company charges customers based upon daily rates of hire, vessel revenues are recognized on a daily basis throughout the contract period. Under a time charter, the Company provides a vessel to a customer and is responsible for all operating expenses, typically excluding fuel. Under a bareboat charter, the Company provides a vessel to a customer and the customer assumes responsibility for all operating expenses and assumes all risks of operation. In the U.S. Gulf of Mexico, time charter durations and rates are typically established in the context of master service agreements that govern the terms and conditions of the charter. Contract or charter durations may range from several days to several years. Charters vary in length from short-term to multi-year periods, many with cancellation clauses and without early termination penalties. As a result of options and frequent renewals, the stated duration of charters may have little correlation with the length of time the vessel is contracted to provide services to a particular customer. The Company also contracts with various customers to carry out management services for vessels as agents for and on behalf of ship owners. These services include crew management, technical management, commercial management, insurance arrangements, sale and purchase of vessels, provisions and bunkering. As the manager of the vessels, the Company undertakes to use its best efforts to provide the agreed management services as agents for and on behalf of the owners in accordance with sound ship management practice and to protect and promote the interest of the owners in all matters relating to the provision of services thereunder. The Company also contracts with various customers to carry out management services regarding engineering for vessel construction and vessel conversions. The vast majority of the ship management agreements span one to three years and are typically billed on a monthly basis. The Company transfers control of the service to the customer and satisfies its performance obligation over the term of the contract, and therefore recognizes revenue over the term of the contract while related costs are expensed as incurred. Revenue that does not meet these criteria is deferred until the criteria is met and is considered a contract liability and is recognized as such. Contract liabilities, which are included in deferred revenue and unearned revenue in the accompanying consolidated balance sheets, for the nine months ended September 30, 2022 and 2021 2022 2021 Balance at beginning of period $ 321 $ 3,307 Revenues deferred during the period — 490 Revenues recognized and reclassifications during the period (321 ) (2,627 ) Balance at end of period $ — $ 1,170 As of September 30, 2022, the Company had no deferred revenues. As of September 30, 2022 and December 31, 2021, the Company had unearned revenue $0.8 million and $1.3 million, respectively, primarily related to mobilizations of vessels. The Company recorded $2.1 million of unearned revenue related to new contract agreements and recognized previously recorded unearned revenue of $2.6 million during the nine months ended September 30, 2022. Cash and Cash Equivalents. The Company considers all highly liquid investments, with an original maturity of three months or less from the date purchased, to be cash equivalents. Restricted Cash. Restricted cash primarily relates to banking facility requirements. Trade and Other Receivables. Customers are primarily major integrated national and international oil companies and large independent oil and natural gas exploration and production companies. Customers are granted credit on a short-term basis and the related credit risks are minimal. Other receivables consist primarily of operating expenses the Company incurs in relation to vessels it manages for other entities, as well as insurance and income tax receivables. The Company routinely reviews its receivables and makes provisions for the credit losses utilizing the Current Expected Credit Losses model ( “ CECL ” ). The CECL model utilizes a lifetime expected credit loss measurement objective for the recognition of credit losses for loans and other receivables at the time the financial asset is originated or acquired. However, those provisions are estimates and actual results may materially differ from those estimates. Trade receivables are deemed uncollectible and are removed from accounts receivable and the allowance for credit losses when collection efforts have been exhausted. Property and Equipment. Equipment, stated at cost, is depreciated using the straight-line method over the estimated useful life of the asset to an estimated salvage value. With respect to each class of asset, the estimated useful life is based upon a newly built asset being placed into service and represents the time period beyond which it is typically not justifiable for the Company to continue to operate the asset in the same or similar manner. From time to time, the Company may acquire older vessels that have already exceeded the Company’s useful life policy, in which case the Company depreciates such assets based on its best estimate of remaining useful life, typically the next survey or certification date. As of September 30, 2022, the estimated useful life (in years) of the Company’s new offshore support vessels was 20 years. Equipment maintenance and repair costs and the costs of routine overhauls, drydockings and inspections performed on vessels and equipment are charged to operating expense as incurred. Expenditures that extend the useful life or improve the marketing and commercial characteristics of equipment as well as major renewals and improvements to other properties are capitalized. Certain interest costs incurred during the construction of equipment are capitalized as part of the assets’ carrying values and are amortized over such assets’ estimated useful lives. There was no capitalized interest recognized during the nine months ended September 30, 2022. During the nine months ended September 30, 2021 capitalized interest totaled $0.3 million. Impairment of Long-Lived Assets. The Company performs an impairment analysis of long-lived assets used in operations, including intangible assets, when indicators of impairment are present. These indicators may include a significant decrease in the market price of a long-lived asset or asset group, a significant adverse change in the extent or manner in which a long-lived asset or asset group is being used or in its physical condition, or a current period operating or cash flow loss combined with a history of operating or cash flow losses or a forecast that demonstrates continuing losses associated with the use of a long-lived asset or asset group. If the carrying values of the assets are not recoverable, as determined by their estimated future undiscounted cash flows, the estimated fair value of the assets or asset groups are compared to their current carrying values and impairment charges are recorded if the carrying value exceeds fair value. For the nine months ended September 30, 2022, the Company recorded impairment charges totaling $3.4 million. The Company recorded impairment charges of $0.9 million for one fast support vessel (“FSV”) classified as held for sale during the first quarter of 2022 and sold during the second quarter of 2022. In addition, in the third quarter of 2022 the Company recorded impairment charges of $1.2 million for one leased-in anchor handling towing supply vessel (“AHTS”) as it is not expected to return to active service during its remaining lease term. Additionally, the Company recorded impairment charges of $1.3 million for other equipment and classified such equipment as assets held for sale as of September 30, 2022 as the Company expects to sell the equipment within one year. The impairment charges for the assets held for sale are included in (losses) gains on asset dispositions and impairments in the accompanying consolidated statements of income (loss). There were no impairments of other owned or leased-in vessels. For the nine months ended September 30, 2021, the Company did not record an impairment on any owned or leased-in vessels. Estimated fair values for the Company owned vessels were established by independent appraisers based on researched market information, replacement cost information and other data. For vessel classes and individual vessels with indicators of impairment as of September 30, 2022, the Company estimated that their future undiscounted cash flows exceeded their current carrying values. However, the Company’s estimates of future undiscounted cash flows are highly subjective as utilization and rates per day worked are uncertain, especially in light of the continued volatility in commodity prices , as well as the timing and cost of reactivating cold-stacked vessels. If market conditions continue to decline, changes in the Company’s expectations on future cash flows may result in recognizing additional impairment charges related to its long-lived assets in future periods. For any vessel or vessel class that ha s indicators of impairment and is deemed not recoverable through future operations, the Company determine s the fair value of the vessel or vessel class. If the fair value determination is less than the carrying value of the vessel or vessel class, an impairment is recognized to reduce the carrying value to fair value. Fair value determination is primarily accomplished by obtaining independent valuations of vessel or vessel classes from qualified third-party appraisers. Impairment of 50% Investments in 50% or less owned companies are reviewed periodically to assess whether there is an other-than-temporary decline in the carrying value of the investment. In its evaluation, the Company considers, among other items, recent and expected financial performance and returns, impairments recorded by the investee and the capital structure of the investee. When the Company determines the estimated fair value of an investment is below carrying value and the decline is other-than-temporary, the investment is written down to its estimated fair value. Actual results may vary from the Company’s estimates due to the uncertainty regarding projected financial performance, the severity and expected duration of declines in value and the available liquidity in the capital markets to support the continuing operations of the investee, among other factors. Although the Company believes its assumptions and estimates are reasonable, the investee’s actual performance compared with the estimates could produce different results and lead to additional impairment charges in future periods. During the nine months ended September 30, 2022 and 2021, the Company did not recognize any impairment charges related to its 50% or less owned companies. Income Taxes. During the nine months ended September 30, 2022, the Company’s effective income tax rate of (7.30)% was primarily due to foreign taxes not creditable against U.S. income taxes, foreign losses for which there is no benefit in the U.S. and the sale of investments in 50% or less owned companies. Accumulated Other Comprehensive Income (Loss). The components of accumulated other comprehensive income were as follows (in thousands): SEACOR Marine Holdings Inc. Stockholders’ Equity Foreign Currency Translation Adjustments Derivative Gains (Losses) on Cash Flow Hedges, net Total Other Comprehensive Income December 31, 2021 $ 10,783 $ (2,728 ) $ 8,055 Other comprehensive (loss) income (6,717 ) 3,211 (3,506 ) Balance as of September 30, 2022 $ 4,066 $ 483 $ 4,549 Earnings ( Basic earnings/loss per share of Common Stock of the Company is computed based on the weighted average number of shares of Common Stock and warrants to purchase Common Stock at an exercise price of $0.01 per share (“Warrants”) issued and outstanding during the relevant periods. The Warrants are included in the basic earnings/loss per share of Common Stock because the shares issuable upon exercise of the Warrants are issuable for de minimis cash consideration and therefore not anti-dilutive. Diluted earnings/loss per share of Common Stock is computed based on the weighted average number of shares of Common Stock and Warrants issued and outstanding plus the effect of other potentially dilutive securities through the application of the treasury stock method and the if-converted method that assumes all shares of Common Stock have been issued and outstanding during the relevant periods pursuant to the conversion of the Old Convertible Notes (as defined in “Note 5. Long-Term Debt”) unless anti-dilutive. As of September 30, 2022, the Company’s outstanding 4.25% Senior Convertible Notes due 2023 (“Old Convertible Notes”) were convertible into 2,907,500 shares of Common Stock. For the three and nine months ended September 30, 2022, diluted loss per share of Common Stock excluded 2,907,500 shares of Common Stock issuable upon conversion of the Old Convertible Notes and exercise of the related Warrants as the effect of their inclusion in the computation would be anti-dilutive. For the three and nine months ended September 30, 2021, diluted earnings per share of Common Stock excluded 2,907,500 shares of Common Stock issuable upon conversion of the Old Convertible Notes and exercise of the related Warrants as the effect of their inclusion in the computation would be anti-dilutive. In addition, for the three and nine months ended September 30, 2022 diluted loss per share of Common Stock excluded 1,645,207 shares of restricted stock and 1,026,865 shares of Common Stock issuable upon exercise of outstanding stock options as the effect of their inclusion in the computation would be anti-dilutive. For the nine months ended September 30, 2021, diluted earnings per share of Common Stock included 11,459 shares of restricted stock as their inclusion in the computation would be dilutive. For the three and nine months ended September 30, 2021 diluted (loss) earnings per share of Common Stock excluded 1,131,599 and 1,120,140 shares of restricted stock, respectively, and 1,061,357 shares of stock issuable upon exercise of outstanding stock options as their inclusion in the computation would be anti-dilutive.

Note Receivable

Note Receivable	9 Months Ended
	Sep. 30, 2022
Receivables [Abstract]
Note Receivable	2 . NOTE RECEIVABLE In connection with the closing of the Framework Agreement Transactions (as defined in “Note 4. Investments, at Equity and Advances to 50% or Less Owned Companies”), on September 29, 2022, SEACOR Marine Capital Inc., a wholly-owned subsidiary of SEACOR Marine (“SEACOR Marine Capital”) purchased all of the outstanding loans under the Second Amended and Restated Term Loan Credit Facility Agreement, made as of July 8, 2022, by and among Mantenimiento Express Marítimo, S.A.P.I. de C.V. (“MexMar”)

Equipment Acquisitions and Disp

Equipment Acquisitions and Dispositions	9 Months Ended
	Sep. 30, 2022
Property Plant And Equipment [Abstract]
Equipment Acquisitions and Dispositions	3 . EQUIPMENT ACQUISITIONS AND DISPOSITIONS During the nine months ended September 30, 2022, capital expenditures were $0.3 million and equipment deliveries were $14.4 million platform supply vessel (“ This equipment was acquired through (i) the sale of one AHTS in exchange for the remaining equity interests in SEACOR Marlin LLC that the Company did not already own, thereby acquiring 100% ownership of its only asset, the PSV SEACOR Marlin, and (ii) the transfer of the hybrid battery system as repayment in full of a certain vessel loan agreement with a former joint venture (see “Note 4. Investments, at Equity and Advances to 50% or Less Owned Companies”). Also, during the nine months ended September 30, 2022, the Company sold one FSV, one liftboat, which was previously removed from service, office space and other equipment for net cash proceeds of $6.7 million, after transaction costs, and a gain of $2.2 million, which included impairment charges of $0.9 million for a FSV classified as held for sale during the first quarter of 2022 and sold during the second quarter of 2022. During nine months ended September 30, 2021, the Company sold one PSV, three FSVs and reduced $22.5 million of debt with hull and machinery insurance proceeds for the liftboat SEACOR Power of $ 25.0 million, for a total of $ 30.1 million and gains of $ million. As of January 12, 2021, the Company recognized a gain on the sale of Windcat Workboats Holdings Ltd. (“Windcat Workboats”) of approximately $22.8 million, calculated as follows (in thousands): January 12, 2021 Total Proceeds Received $ 43,797 Transactions Fees and other Costs 1,562 Cash Sold 3,520 Total Net Proceeds 38,715 Less: Net Equity in Windcat Workboats, net of cash sold 15,790 Less: January Income on Discontinued Operations 169 Gain on Sale of Windcat Workboats $ 22,756 See “Note 13. Discontinued Operations” for additional information on the sale of Windcat Workboats.

Investments, at Equity, and Adv

Investments, at Equity, and Advances to 50% or Less Owned Companies	9 Months Ended
	Sep. 30, 2022
Schedule Of Investments [Abstract]
Investments, at Equity, and Advances to 50% or Less Owned Companies	4 . COMPANIES Investments, at equity, and advances to 50% or less owned companies as of September 30, 2022 and December 31, 2021 were as follows (in thousands): Ownership 2022 2021 MexMar (1) 49.0 % $ — $ 59,940 SEACOR Marlin (2) 49.0 % — 6,958 Offshore Vessel Holdings (1) 49.0 % — 1,847 Seabulk Angola 49.0 % 1,688 1,081 SEACOR Arabia 45.0 % 137 1,821 Other 20.0% - 50.0% 76 80 $ 1,901 $ 71,727 (1) On September 29, 2022, the Company sold its ownership in this joint venture to the majority shareholder. See details below. (2) On September 29, 2022, the Company sold an AHTS in exchange for the remaining equity interests in SEACOR Marlin LLC that it did not already own and consolidated the net assets thereof. See details below. On September 29, 2022, SEACOR Marine and certain of its subsidiaries, on the one hand, and Operadora de Transportes Marítimos, S.A. de C.V. (“OTM”), CME Drillship Holdings DAC (“CME Ireland”), and Offshore Vessels Holding, S.A.P.I. de C.V. (“OVH”), on the other hand, entered into a Framework Agreement (the “Framework Agreement”). OTM and CME Ireland are affiliates of Proyectos Globales de Energía y Servicios CME, S.A. de C.V. (“CME”). Alfredo Miguel Bejos is the President and Chief Executive Officer of CME and also serves as a member of the board of directors of SEACOR Marine. Prior to the closing of the Framework Agreement Transactions (defined below), the Company owned 49% of each of MexMar and OVH through SEACOR Marine International LLC, a wholly-owned subsidiary of SEACOR Marine (“SEACOR Marine International”), and the remaining 51% ownership interests were held by OTM. The Company also owned a minority interest in SEACOR Marlin LLC (“SEACOR Marlin LLC”), the owner of the SEACOR Marlin PSV, and the remaining ownership interests of SEACOR Marlin LLC were held by MexMar. The Framework Agreement provided for, among other things, (i) the sale by SEACOR Marine LLC of all of the outstanding equity interests of SEACOR Marine International to OTM for a purchase price of $66.0 million in cash, (ii) the sale of the AHTS SEACOR Davis to CME Ireland in exchange for the remaining equity interests in SEACOR Marlin LLC, such that SEACOR Marlin LLC became a wholly-owned subsidiary of the Company, (iii) the transfer of a hybrid battery system from OVH to SEACOR Marine Capital as repayment in full of a certain vessel loan agreement provided by the Company to its former joint venture, and (iv) entry into a bareboat charter agreement between SEACOR Marlin LLC and MexMar (collectively, the “Framework Agreement Transactions”). Each of the Framework Agreement Transactions was consummated on September 29, 2022. As a result of the Framework Agreement Transactions, the Company no longer owns any equity interest in either MexMar or in OVH, and the Company owns all of the equity interests in SEACOR Marlin LLC, which owns the PSV SEACOR Marlin. The Company recognized a gain on the sale of MexMar, OVH and other assets of approximately $0.8 million, calculated as follows: September 29, 2022 Total Cash Received $ 66,000 51% ownership in SEACOR Marlin Joint Venture 7,000 Hybrid Battery Equipment 1,394 Less: Transaction Fees and other Costs 1,159 Total Net Proceeds 73,235 Less: Net Equity in MexMar and OVH Joint Ventures 65,546 Less: Net Book Value of SEACOR Davis 5,507 Less: OVH Note Receivable 1,394 Gain on Sale of MexMar, OVH and Other Assets $ 788

Long Term Debt

Long Term Debt	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
Long Term Debt	5 . The Company’s long-term debt obligations as of September 30, 2022 and December 31, 2021 were as follows (in thousands): September 30, 2022 December 31, 2021 Recourse long-term debt (1) Old Convertible Notes $ 125,000 $ 125,000 SEACOR Marine Foreign Holdings Credit Facility (3) 71,313 86,470 Sea-Cat Crewzer III Term Loan Facility 16,703 19,178 SEACOR Offshore Delta (f/k/a SEACOSCO) Acquisition Debt 16,205 18,705 SEACOR Delta (f/k/a SEACOSCO) Shipyard Financing 79,759 86,316 SEACOR Alpine Shipyard Financing 28,484 29,734 SEACOR 88/888 Term Loan (4) 5,500 5,500 Tarahumara Shipyard Financing 6,139 6,500 SEACOR Offshore OSV 16,823 18,052 Total recourse long-term debt 365,926 395,455 Non-recourse long-term debt (2) SEACOR 88/888 Term Loan (4) 5,500 5,500 Total non-recourse long-term debt 5,500 5,500 Total principal due for long-term debt 371,426 400,955 Current portion due within one year (57,567 ) (31,602 ) Unamortized debt discount (28,154 ) (33,398 ) Deferred financing costs (3,149 ) (3,193 ) Long-term debt, less current portion $ 282,556 $ 332,762 (1) Recourse debt represents debt issued by SEACOR Marine and/or its subsidiaries and guaranteed by SEACOR Marine or one of its operating subsidiaries as provided in the relevant debt agreements. (2) Non-recourse debt represents debt issued by one of the Company’s consolidated subsidiaries with no recourse to SEACOR Marine or its other non-debtor operating subsidiaries with respect to the applicable instrument, other than certain limited support obligations as provided in the respective debt agreements, which in aggregate are not considered to be material to the Company’s business and financial condition. (3) As of September 30, 2022, Tranche B of this debt has transitioned from LIBOR to SOFR. See details below. ( 4 ) As of September 30, 2022, this debt has transitioned from LIBOR to SOFR. See details below. As of September 30, 2022, the Company was in compliance with all debt covenants and lender requirements. Old Convertible Notes. As of September 30, 2022 SEACOR Marine had $125.0 million in aggregate principal amount of its convertible senior notes due 2023 (the “Old Convertible Notes”) outstanding. On October 5, 2022, SEACOR Marine and certain funds affiliated with The Carlyle Group Inc. (the “Carlyle Investors”) entered into two agreements pursuant to which SEACOR Marine issued the Carlyle Investors (i) $90.0 million in aggregate principal amount of the Company’s 8.0% / 9.5% Senior PIK Toggle Notes due 2026 (the “Guaranteed Notes”) and (ii) $35.0 million aggregate principal amount of SEACOR Marine’s 4.25% Convertible Senior Notes due 2026 (the “New Convertible Notes”) in exchange for all of SEACOR Marine’s Old Convertible Notes (the “Exchange Transaction”). Guaranteed Notes. The Guaranteed Notes were issued pursuant to the Exchange Agreement (Guaranteed Notes) among SEACOR Marine, as issuer, Falcon Global Robert LLC, a wholly-owned subsidiary of SEACOR Marine (“FG Robert”), as the guarantor, and the Carlyle Investors (the “Guaranteed Notes Exchange Agreement”). Pursuant to the Guaranteed Notes Exchange Agreement, SEACOR Marine has the right to pay interest on the Guaranteed Notes (i) in cash at a rate of 8.0% per annum (“Cash Interest”) or (ii) partly in cash and partly in-kind by increasing the principal amount of the Guaranteed Notes or issuing additional Guaranteed Notes at a rate of 9.5% per annum (“Hybrid Interest”) with the cash portion of the Hybrid Interest bearing interest at a rate of 4.25% per annum and in the in-kind portion of the Hybrid Interest bearing interest at a rate of 5.25% per annum. The Guaranteed Notes mature on July 1, 2026. The Guaranteed Notes are guaranteed on a senior unsecured basis by FG Robert, the owner of the LB Robert liftboat. SEACOR Marine may redeem some or all of the Guaranteed Notes at any time in minimum denominations of $10.0 million, upon not less than 30 nor more than 60 calendar days’ notice, at a price equal to (a) 102% of the principal amount of the Guaranteed Notes redeemed, if redeemed prior to October 1, 2023, (b) 101% of the principal amount of the Guaranteed Notes redeemed, if redeemed on or after October 1, 2023, but prior to October 1, 2024 and (c) 100% of the principal amount of the Guaranteed Notes redeemed, if redeemed on or after October 1, 2024, in each case plus accrued and unpaid interest, if any, to, but not including, the redemption date, provided, SEACOR Marine may not redeem the Guaranteed Notes if the principal amount of Guaranteed Notes and New Convertible Notes outstanding will be equal to or less than $50.0 million in the aggregate, unless SEACOR Marine redeems all of the Guaranteed Notes in whole. The Guaranteed Notes Exchange Agreement contains certain customary covenants that among others, limit the ability of (i) SEACOR Marine and FG Robert to incur indebtedness, (ii) FG Robert to create or incur liens, (iii) SEACOR Marine to create liens on the ownership interest of FG Robert, (iv) FG Robert to sell assets, and (v) SEACOR Marine to sell the ownership interest of FG Robert, as well as customary representations and warranties made by SEACOR Marine, FG Robert and the Carlyle Investors and customary events of default. New Convertible Notes. The New Convertible Notes were issued pursuant to the Exchange Agreement (Convertible Notes) among SEACOR Marine, as issuer, and the Carlyle Investors (the “Convertible Notes Exchange Agreement”). The New Convertible Notes bear interest at a rate of 4.25% per annum payable semi-annually in arrears and mature on July 1, 2026. The New Convertible Notes are convertible into shares of Common Stock at the option of the holders at a conversion rate of 85.1064 shares per $1,000 in principal amount of New Convertible Notes (equivalent to a “Conversion Price” of $11.75) or into warrants to purchase an equal number of shares of Common Stock at an exercise price of $0.01 per share in order to facilitate SEACOR Marine’s compliance with the provisions of the Jones Act. In addition, SEACOR Marine has the right to cause the mandatory conversion of the New Convertibles Notes into Common Stock if the daily VWAP of the Common Stock equals or exceeds (A) in the case of New Convertible Notes held by affiliates of Carlyle, 150% of the Conversion Price and (B) in the case of New Convertible Notes held by any Person other than Carlyle, 115% of the Conversion Price, in each case for each of the 20 consecutive trading days. If SEACOR Marine undergoes a Company Fundamental Change (as defined in the Convertible Notes Exchange Agreement), the holders of the New Convertible Notes may require SEACOR Marine to purchase for cash all or part of the New Convertible Notes at a price equal to 100% of the principal amount the New Convertible Notes to be purchased, plus accrued and unpaid interest to the date of purchase. The New Convertible Notes may be redeemed, in whole but not in part and only if certain conditions are met, as more fully described in the Convertible Notes Exchange Agreement, at a price equal to 100% of the principal amount of the New Convertible Notes to be redeemed, plus accrued and unpaid interest to the date of redemption. Under the Convertibles Notes Exchange Agreement, the Carlyle Investors have the ability to nominate one director to the board of directors of SEACOR Marine. The Convertible Notes Exchange Agreement contains customary representations and warranties made by SEACOR Marine and the Carlyle Investors and contains customary events of default and covenants. SEACOR Marine Foreign Holdings Credit Facility . On September 29, 2022, SEACOR Marine , SEACOR Marine Foreign Holdings Inc., a wholly-owned subsidiary of SEACOR Marine (“SMFH”) , and certain vessel-owning subsidiaries of SEACOR Marine , entered into Amendment No. 5 (“ SMFH Amendment No. 5”) to that certain senior secured loan facility with a syndicate of lenders administered by DNB Bank ASA, New York Branch, dated as of September 26, 2018 and as amended from time to time (the “ SMFH Credit Facility”), and in connection therewith SEACOR Marine entered into the Second Amended and Restated Guaranty, dated as of September 29, 2022, by SEACOR Marine in favor of DNB Bank ASA, New York Branch, as security trustee (the “Second A&R SMFH Credit Facility Guaranty”). SMFH Amendment No. 5 and the Second A&R SMFH Credit Facility Guaranty provided for, among other things, (i) a $5.3 million prepayment of the SMFH Credit Facility thereby reducing the amount outstanding thereunder to approximately $74.7 million, (ii) the establishment of Tranche A and Tranche B loans under the SMFH Credit Facility (each as defined in the SMFH Credit Facility) and (iii) the change in the reference rate for Tranche B from LIBOR to SOFR. Tranche A is comprised of approximately $19.8 million of the principal amount of the loan and will maintain the same Margin (as defined in the SMFH Credit Facility) over LIBOR of 4.75% per annum through December 31, 2022, thereafter reverting to 3.75% per annum and the same maturity date of September 30, 2023. Tranche B is comprised of approximately $54.9 million of the principal amount of the loan, permanently maintains the Margin over SOFR (previously LIBOR) at 4.75% per annum and extends the maturity date from September 30, 2023 to March 31, 2026. On June 15, 2022, SEACOR Marine, SMFH, and certain vessel-owning subsidiaries of SEACOR Marine, entered into Amendment No. 4 (“SMFH Amendment No. 4”) to the SMFH Credit Facility, and in connection therewith SEACOR Marine entered into the Amended and Restated Guaranty, dated as of June 15, 2022, by SEACOR Marine in favor of DNB Bank ASA, New York Branch, as security trustee (the “A&R SMFH Credit Facility Guaranty”). SMFH Amendment No. 4 and the A&R SMFH Credit Facility Guaranty provide for, among other things, the modification of certain financial maintenance and restrictive covenants contained in the A&R SMFH Credit Facility Guaranty, including the amendment of the definition of Cash and Cash Equivalents (as defined in the A&R SMFH Credit Facility Guaranty) to include 35% of the accounts receivable as reported in SEACOR Marine’s financial statements for the second, third and fourth quarter of fiscal year 2022 and to amend the interest coverage ratio through December 31, 2022. The A&R SMFH Credit Facility Guaranty requires the Company to maintain a minimum balance of Cash and Cash Equivalents equal to the greater of (i) $35.0 million and (ii) 7.5% of Total Debt (as defined in the A&R SMFH Credit Facility Guaranty). As of September 30, 2022, the Company's Cash and Cash Equivalents balance used to test compliance with this covenant was $71.3 million or 24.6% of Total Debt. SEACOR 88/888 Term Loan Facility. On August 2, 2022, SEACOR Marine, SEACOR Offshore Eight LLC, a wholly-owned subsidiary of SEACOR Marine, and certain vessel owning wholly-owned subsidiaries of SEACOR Marine, entered into the 2022 Amendment to Loan Agreement and Guaranty (the “2022 88/888 Amendment”) to that certain senior secured loan agreement, dated as of July 5, 2018, with DNB Bank ASA, New York Branch and DNB Capital LLC (as amended, the “SEACOR 88/888 Term Loan”). The SEACOR 88/888 Term Loan is secured by two vessels and SEACOR Marine has provided a limited guaranty of such loan under which claims recoverable from SEACOR Marine shall not exceed the lesser of (x) $5.5 million and (y) 50% of the obligations outstanding at the time a claim is made thereunder. The 2022 88/888 Amendment provides for, among other things, (i) the extension of the maturity date of the SEACOR 88/888 Term Loan from June 29, 2023 to July 1, 2024, (ii) the change in the reference rate from LIBOR to SOFR and (iii) the amendment of the applicable interest rate margin over SOFR (previously LIBOR) from 3.75% to 4.75% Letters of Credit . As of September 30, 2022, the Company had outstanding letters of credit of $1.1 million securing lease obligations, labor and performance guaranties.

Leases

Leases	9 Months Ended
	Sep. 30, 2022
Leases [Abstract]
Leases	6 . LEASES As of September 30, 2022, the Company leased-in two AHTS, one FSV, and certain facilities and other equipment. The leases typically contain purchase and renewal options or rights of first refusal with respect to the sale or lease of the equipment. As of September 30, 2022, the remaining lease terms of the vessels had a duration ranging from 6 to 54 months. The lease terms of certain facilities and other equipment had a duration ranging from 2 to 291 months. As of September 30, 2022, future minimum payments for leases for the remainder of 2022 and the years ended December 31, noted below, were as follows (in thousands): Operating Leases Finance Leases Remainder of 2022 $ 643 $ 114 2023 1,646 726 2024 464 946 2025 515 959 2026 459 953 Years subsequent to 2026 3,614 4,659 7,341 8,357 Interest component (1,790 ) (1,067 ) 5,551 7,290 Current portion of long-term lease liabilities 1,792 374 Long-term lease liabilities $ 3,759 $ 6,916 For the nine months ended September 30, 2022 and 2021 the components of lease expense were as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Operating lease cost $ 967 $ 875 $ 2,664 $ 2,730 Finance lease cost: Amortization of finance lease assets (1) 162 9 384 19 Interest on finance lease liabilities (2) 73 1 174 2 Short-term lease costs 201 234 572 691 $ 1,403 $ 1,119 $ 3,794 $ 3,442 (1) Included in amortization costs in the consolidated statements of income (loss) (2) Included in interest expense in the consolidated statements of income (loss) For the nine months ended September 30, 2022 supplemental cash flow information related to leases was as follows (in thousands): 2022 Operating cash outflows from operating leases $ 1,656 Financing cash outflows from finance leases 237 Right-of-use assets obtained for operating lease liabilities 163 Right-of-use assets obtained for finance lease liabilities 7,248 For the nine months ended September 30, 2022 other information related to leases was as follows: 2022 Weighted average remaining lease term, in years - operating leases 11.1 Weighted average remaining lease term, in years - finance leases 4.5 Weighted average discount rate - operating leases 5.5 % Weighted average discount rate - finance leases 4.0 %

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes	7 . The following table reconciles the difference between the statutory federal income tax rate for the Company and the effective income tax rate for the nine months ended September 30, 2022: Statutory rate 21.00 % Foreign withholding tax and foreign losses for which there is no benefit in the U.S. (14.97 )% Sale of investments in equity investees (12.96 )% Other (0.37 )% Effective income tax rate (7.30 )%

Derivative Instruments and Hedg

Derivative Instruments and Hedging Strategies	9 Months Ended
	Sep. 30, 2022
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Strategies	8 . Derivative instruments are classified as either assets, which are included in other receivables in the accompanying consolidated balance sheets, or liabilities based on their individual fair values. The fair values of the Company’s derivative instruments were as follows (in thousands): September 30, 2022 December 31, 2021 Derivative Asset Derivative Liability Derivative Asset Derivative Liability Derivatives designated as hedging instruments: Interest rate swap agreements (cash flow hedges) $ 472 $ — $ — $ 1,831 472 — — 1,831 Derivatives not designated as hedging instruments: Conversion option liability on Old Convertible Notes — — — — $ — $ — $ — $ — Economic Hedges. The Company enters and settles forward currency exchange, option and future contracts with respect to various foreign currencies. These contracts enable the Company to buy currencies in the future at fixed exchange rates, which could offset possible consequences of changes in currency exchange rates with respect to the Company’s business conducted outside of the U.S. The Company generally does not enter into contracts with forward settlement dates beyond twelve to eighteen months. As of September 30, 2022, the Company had no open forward currency exchange contracts. Cash Flow Hedges. The Company has interest rate swap agreements designated as cash flow hedges. By entering into these interest rate swap agreements, the Company has converted the variable LIBOR component of certain of its outstanding borrowings to a fixed interest rate. The Company recognized gains on derivative instruments designated as cash flow hedges of $2.3 million and $1.6 million for the nine months ended September 30, 2022 and 2021, respectively, as a component of other comprehensive income (loss). The interest rate swap agreements entered into by MexMar, as previously disclosed, were terminated in connection with the Framework Agreement Transactions (see “Note 4. Investments, at Equity and Advances to 50% or Less Owned Companies”). As of September 30, 2022, the Company no longer owns any direct or indirect equity interest in MexMar and, in the future, the Company will not reflect any cash flow hedges of MexMar. As of September 30, 2022, the interest rate swaps held by the Company were as follows • SMFH has an interest rate swap agreement maturing in 2023 that calls for SMFH to pay a fixed rate of interest of 3.32% per annum on the amortized notional value of $6.1 million and receive a variable interest rate based on LIBOR on the amortized notional value; • SMFH has an interest rate swap agreement maturing in 2023 that calls for SMFH to pay a fixed rate of interest of 3.195% per annum on the amortized notional value of $33.3 million and receive a variable interest rate based on LIBOR on the amortized notional value; and • SEACOR 88 LLC and SEACOR 888 LLC, both indirect wholly-owned subsidiaries of SEACOR Marine (collectively, “SEACOR 88/888”), have an interest rate swap agreement maturing in 2023 that calls for SEACOR 88/888 to pay a fixed rate of interest of 3.175% per annum on the amortized notional value of $5.5 million and receive a variable interest rate based on LIBOR on the amortized notional value Other Derivative Instruments. The Company recognized (losses) gains on derivative instruments not designated as hedging instruments for the three and nine months ended September 30, 2022 and 2021 as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Conversion option liability on Old Convertible Notes $ 1 $ 3 $ — $ (3 ) Forward currency exchange, option, and future contracts — — — 390 $ 1 $ 3 $ — $ 387 The conversion option liability relates to the bifurcated embedded conversion option in the Old Convertible Notes issued to investment funds managed and controlled by The Carlyle Group (see “Note 9. Fair Value Measurements”).

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	9 . The fair value of an asset or liability is the price that would be received to sell an asset or transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company utilizes a fair value hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value and defines three levels of inputs that may be used to measure fair value. Level Level Level Level The Company’s financial assets and liabilities as of September 30, 2022 and December 31, 2021 that are measured at fair value on a recurring basis were as follows (in thousands): September 30, 2022 Level 1 Level 2 Level 3 ASSETS Derivative instruments $ — $ 472 $ — December 31, 2021 LIABILITIES Derivative instruments $ — $ 1,831 $ — Level 3 . The fair value of the conversion option liability embedded in the Old Convertible Notes is estimated with significant inputs that are both observable and unobservable in the market and therefore is considered a Level 3 fair value measurement. The Company used a binomial lattice model that assumes the holders will maximize their value by finding the optimal decision between redeeming at the redemption price or converting into shares of Common Stock. This model estimates the fair value of the conversion option as the differential in the fair value of the notes including the conversion option compared with the fair value of the notes excluding the conversion option. The significant observable inputs used in the fair value measurement include the price of Common Stock and the risk-free interest rate. The significant unobservable inputs are the estimated Company credit spread and Common Stock volatility, which were based on comparable companies in the transportation and energy industries. The estimated fair values of the Company’s other financial assets and liabilities as of September 30, 2022 and December 31, 2021 were as follows (in thousands): Estimated Fair Value September 30, 2022 Carrying Amount Level 1 Level 2 Level 3 ASSETS Cash, cash equivalents and restricted cash $ 50,810 $ 50,810 $ — $ — LIABILITIES Long-term debt, including current portion 340,123 — 336,346 — December 31, 2021 ASSETS Cash, cash equivalents and restricted cash $ 41,220 $ 41,220 $ — $ — LIABILITIES Long-term debt, including current portion 364,364 — 372,992 — The carrying value of cash, cash equivalents and restricted cash approximates fair value. The fair value of the Company’s long-term debt was estimated based upon quoted market prices or by using discounted cash flow analysis based on estimated current rates for similar types of arrangements. Considerable judgment was required in developing certain of the estimates of fair value including the consideration of the COVID-19 pandemic as well as the economic effects of the conflict between Russia and Ukraine and the global inflationary environment, that have caused significant volatility in U.S. and international markets, and, accordingly, the estimates presented herein are not necessarily indicative of the amounts that the Company could realize in a current market exchange. Property and equipment . During the nine months ended September 30, 2022, the Company recognized impairment charges of $3.4 million. The Company recorded impairment charges of $0.9 million for one FSV classified as held for sale during the first quarter of 2022 and sold during the second quarter of 2022. In addition, in the third quarter of 2022 the Company recorded impairment charges of $1.2 million for one AHTS as it is not expected to return to active service during its remaining lease term. Additionally, the Company recorded impairment charges of $1.3 million for other equipment and classified such equipment as assets held for sale as of September 30, 2022 as the Company expects to sell the equipment within one year. The impairment charges for the assets held for sale are included in (losses) gains on asset dispositions and impairments in the accompanying consolidated statements of income (loss). During the year ended December 31, 2021, the Company recognized no impairment charges, and none of the Company’s property and equipment had a fair value based on ordinary liquidation value or indicative sales price.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2022
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	10 . COMMITMENTS AND CONTINGENCIES As of September 30, 2022, the Company had unfunded capital commitments of $1.1 million for miscellaneous vessel equipment, $0.3 million of which is payable during the remainder of 2022 and $0.8 million is payable during 2023. The Company has indefinitely deferred an additional $9.4 million of orders with respect to one FSV that the Company had previously reported as unfunded capital commitments. In December 2015, the Brazilian Federal Revenue Office issued a tax-deficiency notice to Seabulk Offshore do Brasil Ltda, an indirect wholly-owned subsidiary of SEACOR Marine (“Seabulk Offshore do Brasil”), with respect to certain profit participation contributions (also known as “PIS”) and social security financing contributions (also known as “COFINS”) requirements alleged to be due from Seabulk Offshore do Brasil (“Deficiency Notice”) in respect of the period of January 2011 until December 2012. In January 2016, the Company administratively appealed the Deficiency Notice on the basis that, among other arguments, (i) such contributions were not applicable in the circumstances of a 70%/30% cost allocation structure, and (ii) the tax inspector had incorrectly determined that values received from outside of Brazil could not be classified as expense refunds. The initial appeal was dismissed by the Brazilian Federal Revenue Office and the Company appealed such dismissal and is currently awaiting an administrative trial. A local Brazilian law has been enacted that supports the Company’s position that such contribution requirements are not applicable, but it is uncertain whether such law will be taken into consideration with respect to administrative proceedings commenced prior to the enactment of the law. Accordingly, the success of Seabulk Offshore do Brasil in the administrative proceedings cannot be assured and the matter may need to be addressed through judicial court proceedings. The potential levy arising from the Deficiency Notice is R$ 20.1 million based on a historical potential levy of R$ 12.87 million (USD $ 3.7 million and USD $ 2.4 million, respectively, based on the exchange rate as of September 30, 2022 ). On April 13, 2021, the SEACOR Power, a liftboat owned by a subsidiary of the Company with nineteen individuals on board, capsized off the coast of Port Fourchon, Louisiana. The incident resulted in the death of several crew members, including the captain of the vessel and five other employees of the Company. The incident also resulted in the constructive total loss of the SEACOR Power. The Company is responsible for the salvage operations related to the vessel and is coordinating these efforts with the U.S. Coast Guard. The salvage operations are currently ongoing and the Company expects salvage costs to be covered by insurance proceeds. The capsizing of the SEACOR Power garnered significant attention from the media as well as local, state and federal politicians. The National Transportation Safety Board (“NTSB”) and the U.S. Coast Guard are currently investigating the incident to determine the cause of the incident and the Company is fully cooperating with the investigations in all respects. The NTSB held a board meeting on October 18, 2022 to adopt the accident report as well as the determination of the probable cause and any related safety recommendations, and published a synopsis of its forthcoming report. The NTSB anticipates making their final report available to the public approximately four to six weeks following the board meeting. The U.S. Coast Guard is also expected to release a report on its investigations although the timing of such release is uncertain. Numerous civil lawsuits have been filed against the Company and other third parties by the family members of deceased crew members and the surviving crew members employed by the Company or by third parties. On June 2, 2021, the Company filed a Limitation of Liability Act complaint in federal court in the Eastern District of Louisiana (“Limitation Action”), which has the effect of enjoining all existing civil lawsuits and requiring the plaintiffs to file their claims relating to the capsizing of the SEACOR Power in the Limitation Action. Nearly all injury and death claims in the Limitation Action for which the Company has financial exposure have been resolved, and the remaining claims are those for which the Company is owed contractual defense and indemnity or which will be covered by insurance. There is significant uncertainty regarding the impact the incident will have on the Company’s reputation and the resulting possible impact on the Company’s business. In the normal course of its business, the Company becomes involved in various other litigation matters including, among others, claims by third parties for alleged property damages and personal injuries. Management has used estimates in determining the Company’s potential exposure to these matters and has recorded reserves in its financial statements related thereto where appropriate. It is possible that a change in the Company’s estimates of that exposure could occur, but the Company does not expect such changes in estimated costs would have a material effect on the Company’s consolidated financial position, results of operations or cash flows. Certain of the Company’s subsidiaries are participating employers in two industry-wide, multi-employer, defined benefit pension funds in the United Kingdom: the U.K Merchant Navy Officers Pension Fund (“MNOPF”) and the U.K. Merchant Navy Ratings Pension Fund (“MNRPF”). The Company’s participation in the MNOPF began with the acquisition of the Stirling group of companies (the “Stirling Group”) in 2001 and relates to certain officers employed between 1978 and 2002 by the Stirling Group and/or its predecessors. The Company’s participation in the MNRPF also began with the acquisition of the Stirling Group in 2001 and relates to ratings employed by the Stirling Group and/or its predecessors through today. Both of these plans are in deficit positions and, depending upon the results of future actuarial valuations, it is possible that the plans could experience funding deficits that will require the Company to recognize payroll related operating expenses in the periods invoices are received. As of September 30, 2022, all previously received invoices related to MNOPF and MNRPF have been settled in full. On October 19, 2021, the Company was informed by the MNRPF that two issues had been identified during a review of the MNRPF by the applicable trustee that would potentially give rise to material additional liabilities for the MNRPF. The MNRPF has indicated that the investigations into these issues remain ongoing, and that further updates w ill be provided as significant developments arise. Should such additional liabilities require the MNRPF to collect additional funds from participating employers, it is possible that the Company will be invoiced for a portion of such funds and recognize payroll related operating expenses in the periods invoices are received.

Stock Based Compensation

Stock Based Compensation	9 Months Ended
	Sep. 30, 2022
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock Based Compensation	1 1 . STOCK BASED COMPENSATION Transactions in connection with the Company’s Equity Incentive Plans during the nine months ended September 30, 2022 were as follows: Restricted Stock Activity: Outstanding as of December 31, 2021 1,163,090 Granted 999,619 Vested (514,002 ) Forfeited (3,500 ) Outstanding as of September 30, 2022 (1) 1,645,207 Stock Option Activity: Outstanding as of December 31, 2021 1,061,357 Exercised (34,492 ) Outstanding as of September 30, 2022 1,026,865 (1) Excludes 253,158 grants For the nine months ended September 30, 2022, the Company acquired for treasury 120,751 shares of Common Stock from its directors and/or employees to cover their tax withholding obligations upon the lapsing of restrictions on share awards for an aggregate purchase price of $0.7 million. These shares were purchased in accordance with the terms of the Company’s 2017 Equity Incentive Plan and the Company’s 2020 Equity Incentive Plan.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2022
Segment Reporting [Abstract]
Segment Information	1 2 . SEGMENT INFORMATION The Company’s segment presentation and basis of measurement of segment profit or loss are as previously described in the 2021 Annual Report. The following tables summarize the operating results, capital expenditures and assets of the Company’s reportable segments for the periods indicated (in thousands): United States (primarily Gulf of Mexico) Africa and Europe Middle East and Asia Latin America Total For the Three Months Ended September 30, 2022 Operating Revenues: Time charter $ 17,075 $ 17,551 $ 11,712 $ 10,162 $ 56,500 Bareboat charter — — — 332 332 Other marine services 2,161 60 319 419 2,959 19,236 17,611 12,031 10,913 59,791 Direct Costs and Expenses: Operating: Personnel 7,243 4,694 5,384 2,831 20,152 Repairs and maintenance 2,002 2,110 1,776 1,489 7,377 Drydocking 1,549 383 3,113 1 5,046 Insurance and loss reserves 1,382 359 762 347 2,850 Fuel, lubes and supplies 1,143 2,284 1,426 563 5,416 Other 314 1,580 878 393 3,165 13,633 11,410 13,339 5,624 44,006 Direct Vessel Profit (Loss) $ 5,603 $ 6,201 $ (1,308 ) $ 5,289 15,785 Other Costs and Expenses: Lease expense $ 278 $ 455 $ 35 $ 400 1,168 Administrative and general 9,978 Depreciation and amortization 4,332 3,461 3,974 1,987 13,754 24,900 Losses on Asset Dispositions and Impairments, Net (1,783 ) Operating Loss $ (10,898 ) United States (primarily Gulf of Mexico) Africa and Europe Middle East and Asia Latin America Total For the Nine Months Ended September 30, 2022 Operating Revenues: Time charter $ 34,698 $ 44,761 $ 39,278 $ 30,008 $ 148,745 Bareboat charter — — — 998 998 Other marine services 6,612 516 828 1,700 9,656 41,310 45,277 40,106 32,706 159,399 Direct Costs and Expenses: Operating: Personnel 17,939 11,756 17,106 10,132 56,933 Repairs and maintenance 4,383 6,327 6,153 5,685 22,548 Drydocking 8,506 1,661 6,325 1 16,493 Insurance and loss reserves 2,809 812 2,017 943 6,581 Fuel, lubes and supplies 2,599 5,247 3,754 1,895 13,495 Other 819 5,279 3,718 1,781 11,597 37,055 31,082 39,073 20,437 127,647 Direct Vessel Profit $ 4,255 $ 14,195 $ 1,033 $ 12,269 31,752 Other Costs and Expenses: Lease expense $ 860 $ 1,313 $ 104 $ 959 3,236 Administrative and general 30,112 Depreciation and amortization 13,532 10,025 12,548 6,228 42,333 75,681 Gains on Asset Dispositions and Impairments, Net 381 Operating Loss $ (43,548 ) As of September 30, 2022 Property and Equipment: Historical Cost $ 259,472 $ 247,967 $ 305,880 $ 179,104 $ 992,423 Accumulated Depreciation (122,340 ) (80,069 ) (91,906 ) (27,583 ) (321,898 ) $ 137,132 $ 167,898 $ 213,974 $ 151,521 $ 670,525 Total Assets (1) $ 177,463 $ 187,495 $ 231,165 $ 167,021 $ 763,144 (1) Total assets by region does not include corporate assets of $79.8 million as of September 30, 2022 . United States (primarily Gulf of Mexico) Africa and Europe (2) Middle East and Asia Latin America Total For the Three Months Ended September 30, 2021 Operating Revenues: Time charter $ 5,289 $ 10,446 $ 13,417 $ 12,630 $ 41,782 Other marine services 1,215 (429 ) 85 1,010 1,881 6,504 10,017 13,502 13,640 43,663 Direct Costs and Expenses: Operating: Personnel 2,428 3,147 5,849 3,627 15,051 Repairs and maintenance 1,266 1,540 1,610 2,120 6,536 Drydocking 239 337 156 39 771 Insurance and loss reserves 462 323 707 697 2,189 Fuel, lubes and supplies 259 1,631 777 1,017 3,684 Other 147 1,424 2,823 823 5,217 4,801 8,402 11,922 8,323 33,448 Direct Vessel Profit from Continuing Operations $ 1,703 $ 1,615 $ 1,580 $ 5,317 10,215 Other Costs and Expenses: Lease expense $ 621 $ 284 $ 377 $ (173 ) 1,109 Administrative and general 9,134 Depreciation and amortization 3,936 3,296 4,456 2,618 14,306 24,549 Gains on Asset Dispositions and Impairments, Net 56 Operating Loss from Continuing Operations $ (14,278 ) United States (primarily Gulf of Mexico) Africa and Europe, Continuing Operations (2) Middle East and Asia Latin America Total For the Nine Months Ended September 30, 2021 Operating Revenues: Time charter $ 10,197 $ 32,385 $ 39,744 $ 35,220 $ 117,546 Bareboat charter 1,163 — — — 1,163 Other 2,488 (922 ) 476 2,223 4,265 13,848 31,463 40,220 37,443 122,974 Direct Costs and Expenses: Operating: Personnel 5,700 10,620 16,435 10,067 42,822 Repairs and maintenance 2,309 4,926 5,319 4,781 17,335 Drydocking 1,891 1,015 2,407 467 5,780 Insurance and loss reserves 1,912 1,108 1,870 1,918 6,808 Fuel, lubes and supplies 703 3,090 2,417 2,569 8,779 Other 448 4,075 4,010 2,313 10,846 12,963 24,834 32,458 22,115 92,370 Direct Vessel Profit from Continuing Operations $ 885 $ 6,629 $ 7,762 $ 15,328 30,604 Other Costs and Expenses: Lease expense $ 1,988 $ 910 $ 434 $ 89 3,421 Administrative and general 26,897 Depreciation and amortization 11,387 9,908 13,829 8,073 43,197 73,515 Gains on Asset Dispositions and Impairments, Net 20,436 Operating Loss from Continuing Operations $ (22,475 ) As of September 30, 2021 Property and Equipment: Historical Cost $ 248,125 $ 212,491 $ 358,356 $ 170,938 $ 989,910 Accumulated Depreciation (122,437 ) (66,424 ) (85,054 ) (29,263 ) (303,178 ) $ 125,688 $ 146,067 $ 273,302 $ 141,675 $ 686,732 Total Assets (1) $ 149,286 $ 162,815 $ 274,324 $ 211,909 $ 798,334 (1) Total assets by region does not include corporate assets of $103.7 (2) In prior periods Africa and Europe were reported as separate segments. Due to the sale of Windcat Workboats, the Company’s European operations are no longer analyzed by the chief operating decision maker on a standalone basis but rather as part of the Africa and Europe segment. As a result, for purposes of segment reporting European operations are now consolidated with Africa and reported as a consolidated segment and prior period information has been conformed to the new consolidated reporting segment. The Company’s investments in 50% or less owned companies, which are accounted for under the equity method, also contribute to its consolidated results of operations. As of September 30, 2022, and 2021, the Company’s investments, at equity and advances to 50% or less owned companies in its other 50% or less owned companies were $1.9 million and $77.4 million, respectively. The significant decrease is the result of the sale of the Company’s interests in MexMar and OVH in the Framework Transactions. Equity in earnings gains of 50% or less owned companies for the nine months ended September 30, 2022 and 2021 were $5.8 million and $10.6 million, respectively.

Discontinued Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 2022
Discontinued Operations And Disposal Groups [Abstract]
Discontinued Operations	13. DISCONTINUED OPERATIONS On January 12, 2021, the Company completed the sale of Windcat Workboats, which was previously classified as assets held for sale. The Company has no continuing involvement in this business, which is considered a strategic shift in the Company’s operations. During the first twelve days of 2021, the Company recognized $0.2 million in net income from operations of Windcat Workboats that was utilized to calculate the gain on the sale of Windcat Workboats. Summarized selected operating results of the Company’s assets held for sale and discontinued operations were as follows (in thousands): Nine Months Ended September 30, 2021 Windcat Workboats Operating Revenues: Time charter $ 903 Other revenue 70 973 Costs and Expenses: Operating 578 Direct Vessel Profit 395 General and Administrative Expenses 238 Lease Expense 24 262 Operating Income 133 Other Income (Expense) Interest income 2 Interest expense (39 ) Foreign currency translation loss 89 52 Operating Income Before Equity Earnings of 50% or Less Owned Companies, Net of Tax $ 185 Income Tax Expense — Operating Income Before Equity Earnings of 50% or Less Owned Companies $ 185 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax (16 ) Net Income from Discontinued Operations $ 169

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2022
Subsequent Events [Abstract]
Subsequent Events	14. The Company has evaluated subsequent events through the filing of this Quarterly Report on Form 10-Q and determined that there have been no material events that have occurred that are not properly recognized and/or disclosed in the consolidated financial statements except for the consummation of the Exchange Transactions described in Note 5. Long-Term Debt.

Basis of Presentation and Acc_2

Basis of Presentation and Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2022
Accounting Policies [Abstract]
Recently Adopted Accounting Standards	Recently Adopted Accounting Standards. On October 29, 2020, the FASB issued ASU 2020-10, Codification Improvements: Amendments that improve the consistency of the Codification by including all disclosure guidance in the appropriate Disclosure section. The guidance was effective for annual periods beginning after December 15, 2020, and interim periods within the annual periods beginning after December 15, 2022. The adoption of the standard did not have a material effect on the disclosures included herein. On August 5, 2020, the FASB issued ASU 2020-06, Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which simplifies the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts on an entity’s own equity. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2021. The Company adopted the new standard on January 1, 2022. The adoption of the standard by the Company did not have a material impact on its consolidated financial position or on its results of operations, cash flows and disclosures. On December 18, 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The adoption of the standard by the Company did not have a material impact on its consolidated financial position or on its results of operations and cash flows.
Recently Issued Accounting Standards	Recently Issued Accounting Standards On March 12, 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides temporary optional guidance to ease the potential burden in accounting for reference rate reform. The new guidance provides optional expedients and exceptions for applying generally accepted accounting principles to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. The ASU is intended to help stakeholders during the global market-wide reference rate transition period and it will be in effect for a limited time through December 31, 2022. As of September 30, 2022, the reference rates for the Company’s SEACOR 88/888 Term Loan Facility and Tranche B under the SEACOR Marine Foreign Holdings Credit Facility have transitioned from the London interbank offered rate (“LIBOR”) to the secured overnight financing rate (“SOFR”) (see “ Note 5 . Long-Term Debt”) . [ The se reference rate transitions by the Company did not have a material impact on its consolidated financial position or on its results of operations and cash flows .] The reference rates for the Company’s other existing debt and interest rate swaps have not changed as a result of any amendment. The Company will continue to monitor changes to reference rates in the remaining applicable agreements and a pply the standard as needed.
Basis of Consolidation	Basis of Consolidation. The consolidated financial statements include the accounts of SEACOR Marine and its controlled subsidiaries. Control is generally deemed to exist if the Company has greater than 50% of the voting rights of a subsidiary. All significant intercompany accounts and transactions are eliminated in the combination and consolidation. Noncontrolling interests in consolidated subsidiaries are included in the consolidated balance sheets as a separate component of equity. The Company reports consolidated net income (loss) inclusive of both the Company’s and the noncontrolling interests’ share, as well as the amounts of consolidated net income (loss) attributable to each of the Company and the noncontrolling interests. If a subsidiary is deconsolidated upon a change in control, any retained noncontrolling equity investment in the former controlled subsidiary is measured at fair value and a gain or loss is recognized in net income (loss) based on such fair value. If a subsidiary is consolidated upon the business acquisition of controlling interests by the Company, any previous noncontrolled equity investment in the subsidiary is measured at fair value and a gain or loss is recognized in net income (loss) based on such fair value. The Company employs the equity method of accounting for investments in 50% or less owned companies that it does not control but has the ability to exercise significant influence over the operating and financial policies of the business venture. Significant influence is generally deemed to exist if the Company has between 20% and 50% of the voting rights of a business venture but may exist when the Company’s ownership percentage is less than 20%. In certain circumstances, the Company may have an economic interest in excess of 50% but may not control and consolidate the business venture. Conversely, the Company may have an economic interest less than 50% but may control and consolidate the business venture. The Company reports its investments in and advances to these business ventures in the accompanying consolidated balance sheets as investments, at equity, and advances to 50% or less owned companies. The Company reports its share of earnings from investments in 50% or less owned companies in the accompanying consolidated statements of income (loss) as equity in earnings of 50% or less owned companies, net of tax. Certain reclassifications were made to previously reported amounts in the consolidated financial statements and notes thereto to make them consistent with the current period presentation.
Use of Estimates	Use of Estimates. The preparation of financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Such estimates include those related to deferred revenues, allowance for credit loss accounts, useful lives of property and equipment, impairments, income tax provisions and certain accrued liabilities. Actual results could differ from estimates and those differences may be material.
Revenue Recognition	Revenue Recognition . Revenue is recognized when (or as) the Company transfers promised goods or services to its customers in amounts that reflect the consideration to which the Company expects to be entitled to in exchange for those goods or services, which occurs when (or as) the Company satisfies its contractual obligations and transfers over control of the promised goods or services to its customers. The Company recognizes revenue, net of sales taxes, based on its estimates of the consideration the Company expects to receive. Costs to obtain or fulfill a contract are expensed as incurred. The Company earns revenue primarily from the time charter and bareboat charter of vessels to customers. Since the Company charges customers based upon daily rates of hire, vessel revenues are recognized on a daily basis throughout the contract period. Under a time charter, the Company provides a vessel to a customer and is responsible for all operating expenses, typically excluding fuel. Under a bareboat charter, the Company provides a vessel to a customer and the customer assumes responsibility for all operating expenses and assumes all risks of operation. In the U.S. Gulf of Mexico, time charter durations and rates are typically established in the context of master service agreements that govern the terms and conditions of the charter. Contract or charter durations may range from several days to several years. Charters vary in length from short-term to multi-year periods, many with cancellation clauses and without early termination penalties. As a result of options and frequent renewals, the stated duration of charters may have little correlation with the length of time the vessel is contracted to provide services to a particular customer. The Company also contracts with various customers to carry out management services for vessels as agents for and on behalf of ship owners. These services include crew management, technical management, commercial management, insurance arrangements, sale and purchase of vessels, provisions and bunkering. As the manager of the vessels, the Company undertakes to use its best efforts to provide the agreed management services as agents for and on behalf of the owners in accordance with sound ship management practice and to protect and promote the interest of the owners in all matters relating to the provision of services thereunder. The Company also contracts with various customers to carry out management services regarding engineering for vessel construction and vessel conversions. The vast majority of the ship management agreements span one to three years and are typically billed on a monthly basis. The Company transfers control of the service to the customer and satisfies its performance obligation over the term of the contract, and therefore recognizes revenue over the term of the contract while related costs are expensed as incurred. Revenue that does not meet these criteria is deferred until the criteria is met and is considered a contract liability and is recognized as such. Contract liabilities, which are included in deferred revenue and unearned revenue in the accompanying consolidated balance sheets, for the nine months ended September 30, 2022 and 2021 2022 2021 Balance at beginning of period $ 321 $ 3,307 Revenues deferred during the period — 490 Revenues recognized and reclassifications during the period (321 ) (2,627 ) Balance at end of period $ — $ 1,170 As of September 30, 2022, the Company had no deferred revenues. As of September 30, 2022 and December 31, 2021, the Company had unearned revenue $0.8 million and $1.3 million, respectively, primarily related to mobilizations of vessels. The Company recorded $2.1 million of unearned revenue related to new contract agreements and recognized previously recorded unearned revenue of $2.6 million during the nine months ended September 30, 2022.
Cash and Cash Equivalents	Cash and Cash Equivalents. The Company considers all highly liquid investments, with an original maturity of three months or less from the date purchased, to be cash equivalents.
Restricted Cash	Restricted Cash. Restricted cash primarily relates to banking facility requirements.
Trade and Other Receivables	Trade and Other Receivables. Customers are primarily major integrated national and international oil companies and large independent oil and natural gas exploration and production companies. Customers are granted credit on a short-term basis and the related credit risks are minimal. Other receivables consist primarily of operating expenses the Company incurs in relation to vessels it manages for other entities, as well as insurance and income tax receivables. The Company routinely reviews its receivables and makes provisions for the credit losses utilizing the Current Expected Credit Losses model ( “ CECL ” ). The CECL model utilizes a lifetime expected credit loss measurement objective for the recognition of credit losses for loans and other receivables at the time the financial asset is originated or acquired. However, those provisions are estimates and actual results may materially differ from those estimates. Trade receivables are deemed uncollectible and are removed from accounts receivable and the allowance for credit losses when collection efforts have been exhausted.
Property and Equipment	Property and Equipment. Equipment, stated at cost, is depreciated using the straight-line method over the estimated useful life of the asset to an estimated salvage value. With respect to each class of asset, the estimated useful life is based upon a newly built asset being placed into service and represents the time period beyond which it is typically not justifiable for the Company to continue to operate the asset in the same or similar manner. From time to time, the Company may acquire older vessels that have already exceeded the Company’s useful life policy, in which case the Company depreciates such assets based on its best estimate of remaining useful life, typically the next survey or certification date. As of September 30, 2022, the estimated useful life (in years) of the Company’s new offshore support vessels was 20 years. Equipment maintenance and repair costs and the costs of routine overhauls, drydockings and inspections performed on vessels and equipment are charged to operating expense as incurred. Expenditures that extend the useful life or improve the marketing and commercial characteristics of equipment as well as major renewals and improvements to other properties are capitalized. Certain interest costs incurred during the construction of equipment are capitalized as part of the assets’ carrying values and are amortized over such assets’ estimated useful lives. There was no capitalized interest recognized during the nine months ended September 30, 2022. During the nine months ended September 30, 2021 capitalized interest totaled $0.3 million.
Impairment of Long-Lived Assets and Impairment of 50% or Less Owned Companies	Impairment of Long-Lived Assets. The Company performs an impairment analysis of long-lived assets used in operations, including intangible assets, when indicators of impairment are present. These indicators may include a significant decrease in the market price of a long-lived asset or asset group, a significant adverse change in the extent or manner in which a long-lived asset or asset group is being used or in its physical condition, or a current period operating or cash flow loss combined with a history of operating or cash flow losses or a forecast that demonstrates continuing losses associated with the use of a long-lived asset or asset group. If the carrying values of the assets are not recoverable, as determined by their estimated future undiscounted cash flows, the estimated fair value of the assets or asset groups are compared to their current carrying values and impairment charges are recorded if the carrying value exceeds fair value. For the nine months ended September 30, 2022, the Company recorded impairment charges totaling $3.4 million. The Company recorded impairment charges of $0.9 million for one fast support vessel (“FSV”) classified as held for sale during the first quarter of 2022 and sold during the second quarter of 2022. In addition, in the third quarter of 2022 the Company recorded impairment charges of $1.2 million for one leased-in anchor handling towing supply vessel (“AHTS”) as it is not expected to return to active service during its remaining lease term. Additionally, the Company recorded impairment charges of $1.3 million for other equipment and classified such equipment as assets held for sale as of September 30, 2022 as the Company expects to sell the equipment within one year. The impairment charges for the assets held for sale are included in (losses) gains on asset dispositions and impairments in the accompanying consolidated statements of income (loss). There were no impairments of other owned or leased-in vessels. For the nine months ended September 30, 2021, the Company did not record an impairment on any owned or leased-in vessels. Estimated fair values for the Company owned vessels were established by independent appraisers based on researched market information, replacement cost information and other data. For vessel classes and individual vessels with indicators of impairment as of September 30, 2022, the Company estimated that their future undiscounted cash flows exceeded their current carrying values. However, the Company’s estimates of future undiscounted cash flows are highly subjective as utilization and rates per day worked are uncertain, especially in light of the continued volatility in commodity prices , as well as the timing and cost of reactivating cold-stacked vessels. If market conditions continue to decline, changes in the Company’s expectations on future cash flows may result in recognizing additional impairment charges related to its long-lived assets in future periods. For any vessel or vessel class that ha s indicators of impairment and is deemed not recoverable through future operations, the Company determine s the fair value of the vessel or vessel class. If the fair value determination is less than the carrying value of the vessel or vessel class, an impairment is recognized to reduce the carrying value to fair value. Fair value determination is primarily accomplished by obtaining independent valuations of vessel or vessel classes from qualified third-party appraisers. Impairment of 50% Investments in 50% or less owned companies are reviewed periodically to assess whether there is an other-than-temporary decline in the carrying value of the investment. In its evaluation, the Company considers, among other items, recent and expected financial performance and returns, impairments recorded by the investee and the capital structure of the investee. When the Company determines the estimated fair value of an investment is below carrying value and the decline is other-than-temporary, the investment is written down to its estimated fair value. Actual results may vary from the Company’s estimates due to the uncertainty regarding projected financial performance, the severity and expected duration of declines in value and the available liquidity in the capital markets to support the continuing operations of the investee, among other factors. Although the Company believes its assumptions and estimates are reasonable, the investee’s actual performance compared with the estimates could produce different results and lead to additional impairment charges in future periods. During the nine months ended September 30, 2022 and 2021, the Company did not recognize any impairment charges related to its 50% or less owned companies.
Income Taxes	Income Taxes. During the nine months ended September 30, 2022, the Company’s effective income tax rate of (7.30)% was primarily due to foreign taxes not creditable against U.S. income taxes, foreign losses for which there is no benefit in the U.S. and the sale of investments in 50% or less owned companies.
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss). The components of accumulated other comprehensive income were as follows (in thousands): SEACOR Marine Holdings Inc. Stockholders’ Equity Foreign Currency Translation Adjustments Derivative Gains (Losses) on Cash Flow Hedges, net Total Other Comprehensive Income December 31, 2021 $ 10,783 $ (2,728 ) $ 8,055 Other comprehensive (loss) income (6,717 ) 3,211 (3,506 ) Balance as of September 30, 2022 $ 4,066 $ 483 $ 4,549
Earnings (Loss) Per Share	Earnings ( Basic earnings/loss per share of Common Stock of the Company is computed based on the weighted average number of shares of Common Stock and warrants to purchase Common Stock at an exercise price of $0.01 per share (“Warrants”) issued and outstanding during the relevant periods. The Warrants are included in the basic earnings/loss per share of Common Stock because the shares issuable upon exercise of the Warrants are issuable for de minimis cash consideration and therefore not anti-dilutive. Diluted earnings/loss per share of Common Stock is computed based on the weighted average number of shares of Common Stock and Warrants issued and outstanding plus the effect of other potentially dilutive securities through the application of the treasury stock method and the if-converted method that assumes all shares of Common Stock have been issued and outstanding during the relevant periods pursuant to the conversion of the Old Convertible Notes (as defined in “Note 5. Long-Term Debt”) unless anti-dilutive. As of September 30, 2022, the Company’s outstanding 4.25% Senior Convertible Notes due 2023 (“Old Convertible Notes”) were convertible into 2,907,500 shares of Common Stock. For the three and nine months ended September 30, 2022, diluted loss per share of Common Stock excluded 2,907,500 shares of Common Stock issuable upon conversion of the Old Convertible Notes and exercise of the related Warrants as the effect of their inclusion in the computation would be anti-dilutive. For the three and nine months ended September 30, 2021, diluted earnings per share of Common Stock excluded 2,907,500 shares of Common Stock issuable upon conversion of the Old Convertible Notes and exercise of the related Warrants as the effect of their inclusion in the computation would be anti-dilutive. In addition, for the three and nine months ended September 30, 2022 diluted loss per share of Common Stock excluded 1,645,207 shares of restricted stock and 1,026,865 shares of Common Stock issuable upon exercise of outstanding stock options as the effect of their inclusion in the computation would be anti-dilutive. For the nine months ended September 30, 2021, diluted earnings per share of Common Stock included 11,459 shares of restricted stock as their inclusion in the computation would be dilutive. For the three and nine months ended September 30, 2021 diluted (loss) earnings per share of Common Stock excluded 1,131,599 and 1,120,140 shares of restricted stock, respectively, and 1,061,357 shares of stock issuable upon exercise of outstanding stock options as their inclusion in the computation would be anti-dilutive.

Basis of Presentation and Acc_3

Basis of Presentation and Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2022
Basis Of Presentation And Accounting Policies [Abstract]
Schedule of Deferred Revenues	Revenue that does not meet these criteria is deferred until the criteria is met and is considered a contract liability and is recognized as such. Contract liabilities, which are included in deferred revenue and unearned revenue in the accompanying consolidated balance sheets, for the nine months ended September 30, 2022 and 2021 2022 2021 Balance at beginning of period $ 321 $ 3,307 Revenues deferred during the period — 490 Revenues recognized and reclassifications during the period (321 ) (2,627 ) Balance at end of period $ — $ 1,170
Schedule of Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss). The components of accumulated other comprehensive income were as follows (in thousands): SEACOR Marine Holdings Inc. Stockholders’ Equity Foreign Currency Translation Adjustments Derivative Gains (Losses) on Cash Flow Hedges, net Total Other Comprehensive Income December 31, 2021 $ 10,783 $ (2,728 ) $ 8,055 Other comprehensive (loss) income (6,717 ) 3,211 (3,506 ) Balance as of September 30, 2022 $ 4,066 $ 483 $ 4,549

Equipment Acquisitions and Di_2

Equipment Acquisitions and Dispositions (Tables)	9 Months Ended
	Sep. 30, 2022
Property Plant And Equipment [Abstract]
Schedule of Gain on Sale of Windcat Workboats	As of January 12, 2021, the Company recognized a gain on the sale of Windcat Workboats Holdings Ltd. (“Windcat Workboats”) of approximately $22.8 million, calculated as follows (in thousands): January 12, 2021 Total Proceeds Received $ 43,797 Transactions Fees and other Costs 1,562 Cash Sold 3,520 Total Net Proceeds 38,715 Less: Net Equity in Windcat Workboats, net of cash sold 15,790 Less: January Income on Discontinued Operations 169 Gain on Sale of Windcat Workboats $ 22,756

Investments, at Equity, and A_2

Investments, at Equity, and Advances to 50% or Less Owned Companies (Tables)	9 Months Ended
	Sep. 30, 2022
Schedule Of Investments [Abstract]
Equity Method Investments	Investments, at equity, and advances to 50% or less owned companies as of September 30, 2022 and December 31, 2021 were as follows (in thousands): Ownership 2022 2021 MexMar (1) 49.0 % $ — $ 59,940 SEACOR Marlin (2) 49.0 % — 6,958 Offshore Vessel Holdings (1) 49.0 % — 1,847 Seabulk Angola 49.0 % 1,688 1,081 SEACOR Arabia 45.0 % 137 1,821 Other 20.0% - 50.0% 76 80 $ 1,901 $ 71,727 (1) On September 29, 2022, the Company sold its ownership in this joint venture to the majority shareholder. See details below. (2) On September 29, 2022, the Company sold an AHTS in exchange for the remaining equity interests in SEACOR Marlin LLC that it did not already own and consolidated the net assets thereof. See details below.
Schedule of Gain on Sale of Equity Investments	September 29, 2022 Total Cash Received $ 66,000 51% ownership in SEACOR Marlin Joint Venture 7,000 Hybrid Battery Equipment 1,394 Less: Transaction Fees and other Costs 1,159 Total Net Proceeds 73,235 Less: Net Equity in MexMar and OVH Joint Ventures 65,546 Less: Net Book Value of SEACOR Davis 5,507 Less: OVH Note Receivable 1,394 Gain on Sale of MexMar, OVH and Other Assets $ 788

Long-term Debt (Tables)

Long-term Debt (Tables)	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
Schedule of Long-term Debt Obligations	The Company’s long-term debt obligations as of September 30, 2022 and December 31, 2021 were as follows (in thousands): September 30, 2022 December 31, 2021 Recourse long-term debt (1) Old Convertible Notes $ 125,000 $ 125,000 SEACOR Marine Foreign Holdings Credit Facility (3) 71,313 86,470 Sea-Cat Crewzer III Term Loan Facility 16,703 19,178 SEACOR Offshore Delta (f/k/a SEACOSCO) Acquisition Debt 16,205 18,705 SEACOR Delta (f/k/a SEACOSCO) Shipyard Financing 79,759 86,316 SEACOR Alpine Shipyard Financing 28,484 29,734 SEACOR 88/888 Term Loan (4) 5,500 5,500 Tarahumara Shipyard Financing 6,139 6,500 SEACOR Offshore OSV 16,823 18,052 Total recourse long-term debt 365,926 395,455 Non-recourse long-term debt (2) SEACOR 88/888 Term Loan (4) 5,500 5,500 Total non-recourse long-term debt 5,500 5,500 Total principal due for long-term debt 371,426 400,955 Current portion due within one year (57,567 ) (31,602 ) Unamortized debt discount (28,154 ) (33,398 ) Deferred financing costs (3,149 ) (3,193 ) Long-term debt, less current portion $ 282,556 $ 332,762 (1) Recourse debt represents debt issued by SEACOR Marine and/or its subsidiaries and guaranteed by SEACOR Marine or one of its operating subsidiaries as provided in the relevant debt agreements. (2) Non-recourse debt represents debt issued by one of the Company’s consolidated subsidiaries with no recourse to SEACOR Marine or its other non-debtor operating subsidiaries with respect to the applicable instrument, other than certain limited support obligations as provided in the respective debt agreements, which in aggregate are not considered to be material to the Company’s business and financial condition. (3) As of September 30, 2022, Tranche B of this debt has transitioned from LIBOR to SOFR. See details below. ( 4 ) As of September 30, 2022, this debt has transitioned from LIBOR to SOFR. See details below.

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2022
Leases [Abstract]
Summary of Future Minimum Payments for Leases	As of September 30, 2022, future minimum payments for leases for the remainder of 2022 and the years ended December 31, noted below, were as follows (in thousands): Operating Leases Finance Leases Remainder of 2022 $ 643 $ 114 2023 1,646 726 2024 464 946 2025 515 959 2026 459 953 Years subsequent to 2026 3,614 4,659 7,341 8,357 Interest component (1,790 ) (1,067 ) 5,551 7,290 Current portion of long-term lease liabilities 1,792 374 Long-term lease liabilities $ 3,759 $ 6,916
Summary of Components of Leases Expense	For the nine months ended September 30, 2022 and 2021 the components of lease expense were as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Operating lease cost $ 967 $ 875 $ 2,664 $ 2,730 Finance lease cost: Amortization of finance lease assets (1) 162 9 384 19 Interest on finance lease liabilities (2) 73 1 174 2 Short-term lease costs 201 234 572 691 $ 1,403 $ 1,119 $ 3,794 $ 3,442 (1) Included in amortization costs in the consolidated statements of income (loss) (2) Included in interest expense in the consolidated statements of income (loss)
Summary of Supplemental Cash Flow Information Related to Leases	For the nine months ended September 30, 2022 supplemental cash flow information related to leases was as follows (in thousands): 2022 Operating cash outflows from operating leases $ 1,656 Financing cash outflows from finance leases 237 Right-of-use assets obtained for operating lease liabilities 163 Right-of-use assets obtained for finance lease liabilities 7,248
Summary of Other Information Related to Leases	For the nine months ended September 30, 2022 other information related to leases was as follows: 2022 Weighted average remaining lease term, in years - operating leases 11.1 Weighted average remaining lease term, in years - finance leases 4.5 Weighted average discount rate - operating leases 5.5 % Weighted average discount rate - finance leases 4.0 %

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation	The following table reconciles the difference between the statutory federal income tax rate for the Company and the effective income tax rate for the nine months ended September 30, 2022: Statutory rate 21.00 % Foreign withholding tax and foreign losses for which there is no benefit in the U.S. (14.97 )% Sale of investments in equity investees (12.96 )% Other (0.37 )% Effective income tax rate (7.30 )%

Derivative Instruments and He_2

Derivative Instruments and Hedging Strategies (Tables)	9 Months Ended
	Sep. 30, 2022
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Schedule of Fair Value of Derivative Assets and Liabilities	The fair values of the Company’s derivative instruments were as follows (in thousands): September 30, 2022 December 31, 2021 Derivative Asset Derivative Liability Derivative Asset Derivative Liability Derivatives designated as hedging instruments: Interest rate swap agreements (cash flow hedges) $ 472 $ — $ — $ 1,831 472 — — 1,831 Derivatives not designated as hedging instruments: Conversion option liability on Old Convertible Notes — — — — $ — $ — $ — $ —
Schedule of Gains (Losses) on Derivative Instruments not Designated as Hedging Instruments	The Company recognized (losses) gains on derivative instruments not designated as hedging instruments for the three and nine months ended September 30, 2022 and 2021 as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Conversion option liability on Old Convertible Notes $ 1 $ 3 $ — $ (3 ) Forward currency exchange, option, and future contracts — — — 390 $ 1 $ 3 $ — $ 387

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2022
Fair Value Disclosures [Abstract]
Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis	The Company’s financial assets and liabilities as of September 30, 2022 and December 31, 2021 that are measured at fair value on a recurring basis were as follows (in thousands): September 30, 2022 Level 1 Level 2 Level 3 ASSETS Derivative instruments $ — $ 472 $ — December 31, 2021 LIABILITIES Derivative instruments $ — $ 1,831 $ —
Schedule of Estimated Fair Values of Financial Assets and Liabilities	The estimated fair values of the Company’s other financial assets and liabilities as of September 30, 2022 and December 31, 2021 were as follows (in thousands): Estimated Fair Value September 30, 2022 Carrying Amount Level 1 Level 2 Level 3 ASSETS Cash, cash equivalents and restricted cash $ 50,810 $ 50,810 $ — $ — LIABILITIES Long-term debt, including current portion 340,123 — 336,346 — December 31, 2021 ASSETS Cash, cash equivalents and restricted cash $ 41,220 $ 41,220 $ — $ — LIABILITIES Long-term debt, including current portion 364,364 — 372,992 —

Stock Based Compensation (Table

Stock Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2022
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule of Equity Incentive Plan Transactions	Transactions in connection with the Company’s Equity Incentive Plans during the nine months ended September 30, 2022 were as follows: Restricted Stock Activity: Outstanding as of December 31, 2021 1,163,090 Granted 999,619 Vested (514,002 ) Forfeited (3,500 ) Outstanding as of September 30, 2022 (1) 1,645,207 Stock Option Activity: Outstanding as of December 31, 2021 1,061,357 Exercised (34,492 ) Outstanding as of September 30, 2022 1,026,865 (1) Excludes 253,158 grants

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2022
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The following tables summarize the operating results, capital expenditures and assets of the Company’s reportable segments for the periods indicated (in thousands): United States (primarily Gulf of Mexico) Africa and Europe Middle East and Asia Latin America Total For the Three Months Ended September 30, 2022 Operating Revenues: Time charter $ 17,075 $ 17,551 $ 11,712 $ 10,162 $ 56,500 Bareboat charter — — — 332 332 Other marine services 2,161 60 319 419 2,959 19,236 17,611 12,031 10,913 59,791 Direct Costs and Expenses: Operating: Personnel 7,243 4,694 5,384 2,831 20,152 Repairs and maintenance 2,002 2,110 1,776 1,489 7,377 Drydocking 1,549 383 3,113 1 5,046 Insurance and loss reserves 1,382 359 762 347 2,850 Fuel, lubes and supplies 1,143 2,284 1,426 563 5,416 Other 314 1,580 878 393 3,165 13,633 11,410 13,339 5,624 44,006 Direct Vessel Profit (Loss) $ 5,603 $ 6,201 $ (1,308 ) $ 5,289 15,785 Other Costs and Expenses: Lease expense $ 278 $ 455 $ 35 $ 400 1,168 Administrative and general 9,978 Depreciation and amortization 4,332 3,461 3,974 1,987 13,754 24,900 Losses on Asset Dispositions and Impairments, Net (1,783 ) Operating Loss $ (10,898 ) United States (primarily Gulf of Mexico) Africa and Europe Middle East and Asia Latin America Total For the Nine Months Ended September 30, 2022 Operating Revenues: Time charter $ 34,698 $ 44,761 $ 39,278 $ 30,008 $ 148,745 Bareboat charter — — — 998 998 Other marine services 6,612 516 828 1,700 9,656 41,310 45,277 40,106 32,706 159,399 Direct Costs and Expenses: Operating: Personnel 17,939 11,756 17,106 10,132 56,933 Repairs and maintenance 4,383 6,327 6,153 5,685 22,548 Drydocking 8,506 1,661 6,325 1 16,493 Insurance and loss reserves 2,809 812 2,017 943 6,581 Fuel, lubes and supplies 2,599 5,247 3,754 1,895 13,495 Other 819 5,279 3,718 1,781 11,597 37,055 31,082 39,073 20,437 127,647 Direct Vessel Profit $ 4,255 $ 14,195 $ 1,033 $ 12,269 31,752 Other Costs and Expenses: Lease expense $ 860 $ 1,313 $ 104 $ 959 3,236 Administrative and general 30,112 Depreciation and amortization 13,532 10,025 12,548 6,228 42,333 75,681 Gains on Asset Dispositions and Impairments, Net 381 Operating Loss $ (43,548 ) As of September 30, 2022 Property and Equipment: Historical Cost $ 259,472 $ 247,967 $ 305,880 $ 179,104 $ 992,423 Accumulated Depreciation (122,340 ) (80,069 ) (91,906 ) (27,583 ) (321,898 ) $ 137,132 $ 167,898 $ 213,974 $ 151,521 $ 670,525 Total Assets (1) $ 177,463 $ 187,495 $ 231,165 $ 167,021 $ 763,144 (1) Total assets by region does not include corporate assets of $79.8 million as of September 30, 2022 . United States (primarily Gulf of Mexico) Africa and Europe (2) Middle East and Asia Latin America Total For the Three Months Ended September 30, 2021 Operating Revenues: Time charter $ 5,289 $ 10,446 $ 13,417 $ 12,630 $ 41,782 Other marine services 1,215 (429 ) 85 1,010 1,881 6,504 10,017 13,502 13,640 43,663 Direct Costs and Expenses: Operating: Personnel 2,428 3,147 5,849 3,627 15,051 Repairs and maintenance 1,266 1,540 1,610 2,120 6,536 Drydocking 239 337 156 39 771 Insurance and loss reserves 462 323 707 697 2,189 Fuel, lubes and supplies 259 1,631 777 1,017 3,684 Other 147 1,424 2,823 823 5,217 4,801 8,402 11,922 8,323 33,448 Direct Vessel Profit from Continuing Operations $ 1,703 $ 1,615 $ 1,580 $ 5,317 10,215 Other Costs and Expenses: Lease expense $ 621 $ 284 $ 377 $ (173 ) 1,109 Administrative and general 9,134 Depreciation and amortization 3,936 3,296 4,456 2,618 14,306 24,549 Gains on Asset Dispositions and Impairments, Net 56 Operating Loss from Continuing Operations $ (14,278 ) United States (primarily Gulf of Mexico) Africa and Europe, Continuing Operations (2) Middle East and Asia Latin America Total For the Nine Months Ended September 30, 2021 Operating Revenues: Time charter $ 10,197 $ 32,385 $ 39,744 $ 35,220 $ 117,546 Bareboat charter 1,163 — — — 1,163 Other 2,488 (922 ) 476 2,223 4,265 13,848 31,463 40,220 37,443 122,974 Direct Costs and Expenses: Operating: Personnel 5,700 10,620 16,435 10,067 42,822 Repairs and maintenance 2,309 4,926 5,319 4,781 17,335 Drydocking 1,891 1,015 2,407 467 5,780 Insurance and loss reserves 1,912 1,108 1,870 1,918 6,808 Fuel, lubes and supplies 703 3,090 2,417 2,569 8,779 Other 448 4,075 4,010 2,313 10,846 12,963 24,834 32,458 22,115 92,370 Direct Vessel Profit from Continuing Operations $ 885 $ 6,629 $ 7,762 $ 15,328 30,604 Other Costs and Expenses: Lease expense $ 1,988 $ 910 $ 434 $ 89 3,421 Administrative and general 26,897 Depreciation and amortization 11,387 9,908 13,829 8,073 43,197 73,515 Gains on Asset Dispositions and Impairments, Net 20,436 Operating Loss from Continuing Operations $ (22,475 ) As of September 30, 2021 Property and Equipment: Historical Cost $ 248,125 $ 212,491 $ 358,356 $ 170,938 $ 989,910 Accumulated Depreciation (122,437 ) (66,424 ) (85,054 ) (29,263 ) (303,178 ) $ 125,688 $ 146,067 $ 273,302 $ 141,675 $ 686,732 Total Assets (1) $ 149,286 $ 162,815 $ 274,324 $ 211,909 $ 798,334 (1) Total assets by region does not include corporate assets of $103.7 (2) In prior periods Africa and Europe were reported as separate segments. Due to the sale of Windcat Workboats, the Company’s European operations are no longer analyzed by the chief operating decision maker on a standalone basis but rather as part of the Africa and Europe segment. As a result, for purposes of segment reporting European operations are now consolidated with Africa and reported as a consolidated segment and prior period information has been conformed to the new consolidated reporting segment.

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2022
Discontinued Operations And Disposal Groups [Abstract]
Schedule of Assets Held for Sale	Summarized selected operating results of the Company’s assets held for sale and discontinued operations were as follows (in thousands) Nine Months Ended September 30, 2021 Windcat Workboats Operating Revenues: Time charter $ 903 Other revenue 70 973 Costs and Expenses: Operating 578 Direct Vessel Profit 395 General and Administrative Expenses 238 Lease Expense 24 262 Operating Income 133 Other Income (Expense) Interest income 2 Interest expense (39 ) Foreign currency translation loss 89 52 Operating Income Before Equity Earnings of 50% or Less Owned Companies, Net of Tax $ 185 Income Tax Expense — Operating Income Before Equity Earnings of 50% or Less Owned Companies $ 185 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax (16 ) Net Income from Discontinued Operations $ 169

Basis of Presentation and Acc_4

Basis of Presentation and Accounting Policies - Additional Information (Details) - USD ($)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Basis Of Presentation And Accounting Policies [Line Items]
Deferred revenue	$ 0			$ 0
Unearned revenue related to new contract agreements				2,100,000
Unearned revenue previously recorded recognized				2,600,000		$ 2,600,000
Capitalized interest costs, including allowance for funds used during construction, total				0	$ 300,000
Impairment of long-lived assets owned or leased in vessels				3,400,000	0
Equity method investment, other than temporary impairment				$ 0	$ 0
Effective income tax rate reconciliation, percent, total				(7.30%)
Class of warrant or right, exercise price of warrants or rights	$ 0.01			$ 0.01
Incremental common shares attributable to conversion of debt securities, total	2,907,500			2,907,500
4.25 % Senior Convertible Notes
Basis Of Presentation And Accounting Policies [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	2,907,500		2,907,500	2,907,500	2,907,500
Debt instrument percentage	4.25%			4.25%
Debt instrument maturity year				2023
Restricted Stock
Basis Of Presentation And Accounting Policies [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	1,645,207		1,131,599	1,645,207	1,120,140
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements					11,459
Employee Stock Option
Basis Of Presentation And Accounting Policies [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	1,026,865		1,061,357	1,026,865	1,061,357
Fast Support Vessel
Basis Of Presentation And Accounting Policies [Line Items]
Impairment of long-lived assets held for sale		$ 900,000
Anchor Handling Towing Supply Vessel
Basis Of Presentation And Accounting Policies [Line Items]
Impairment of long-lived assets owned or leased in vessels	$ 1,200,000
Tower and Gangway
Basis Of Presentation And Accounting Policies [Line Items]
Impairment of long-lived assets held for sale				$ 1,300,000
Vessels
Basis Of Presentation And Accounting Policies [Line Items]
Unearned revenue				$ 800,000		$ 1,300,000
Offshore Support Vessels
Basis Of Presentation And Accounting Policies [Line Items]
Estimated useful life (Year)				20 years
Minimum | Equity Investments in 50% or Less Owned Companies
Basis Of Presentation And Accounting Policies [Line Items]
Equity method investment, ownership percentage	20%			20%
Minimum | SEACOR Marine Foreign Holdings | Equity Investments in 50% or Less Owned Companies
Basis Of Presentation And Accounting Policies [Line Items]
Equity method investment, ownership percentage	50%			50%
Maximum | Equity Investments in 50% or Less Owned Companies
Basis Of Presentation And Accounting Policies [Line Items]
Equity method investment, ownership percentage	50%		50%	50%	50%
Accounting Standards Update 2020-10
Basis Of Presentation And Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]	true			true
Change in accounting principle, accounting standards update, immaterial effect [true false]	true			true
Accounting Standards Update 2020-06
Basis Of Presentation And Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]	true			true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2022			Jan. 01, 2022
Change in accounting principle, accounting standards update, immaterial effect [true false]	true			true
Accounting Standards Update 2019-12
Basis Of Presentation And Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]	true			true
Change in accounting principle, accounting standards update, immaterial effect [true false]	true			true

Basis of Presentation and Acc_5

Basis of Presentation and Accounting Policies - Schedule of Deferred Revenues (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Basis Of Presentation And Accounting Policies [Abstract]
Balance at beginning of period	$ 321	$ 3,307
Revenues deferred during the period		490
Revenues recognized and reclassifications during the period	$ (321)	(2,627)
Balance at end of period		$ 1,170

Basis of Presentation and Acc_6

Basis of Presentation and Accounting Policies - Schedule of Accumulated Other Comprehensive Income (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($)
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	$ 446,541
Balance	388,970
Foreign Currency Translation Adjustments Attributable to Parent
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	10,783
Other comprehensive (loss) income	(6,717)
Balance	4,066
Derivative Gains (Losses) on Cash Flow Hedges, net Attributable to Parent
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(2,728)
Other comprehensive (loss) income	3,211
Balance	483
AOCI Attributable to Parent
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	8,055
Other comprehensive (loss) income	(3,506)
Balance	$ 4,549

Note Receivable - Additional In

Note Receivable - Additional Information (Details) - USD ($)			9 Months Ended
	Sep. 29, 2022	Dec. 16, 2016	Sep. 30, 2022	Sep. 30, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Prepayment of outstanding loan			$ 0	$ 755,000
MexMar Original Facility Agreement | Term Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal of loan	$ 28,831,148.32
MexMar Second Amended and Restated Term Loan Credit Facility Agreement | Term Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity date		Jan. 23, 2025
Interest rate		4.70%
MexMar Third A&R Facility Agreement | Term Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal of loan	20,000,000
Prepayment of outstanding loan	$ 8,800,000
Maturity date	Sep. 30, 2023
Interest rate	5%
Frequency of principal repayment	four quarterly installments
Principal repayment of loan	$ 5,000,000
Minimum | MexMar Second Amended and Restated Term Loan Credit Facility Agreement | Term Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum cash requirement		$ 10,000,000
Minimum | MexMar Third A&R Facility Agreement | Term Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum cash requirement	$ 2,500,000

Equipment Acquisitions and Di_3

Equipment Acquisitions and Dispositions - Additional Information (Details) $ in Thousands		3 Months Ended	9 Months Ended
	Jan. 12, 2021 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2022 USD ($) Vessel	Sep. 30, 2021 USD ($) Vessel
Property Plant And Equipment [Line Items]
Proceeds from disposition of property and equipment			$ 6,681	$ 30,137
Property plant equipment consideration transferred				30,100
Falcon Global U S A Term Loan Facility
Property Plant And Equipment [Line Items]
Reduced of debt under credit facility				$ 22,500
Maximum | Equity Investments in 50% or Less Owned Companies
Property Plant And Equipment [Line Items]
Equity method investment, ownership percentage			50%	50%
Minimum | Equity Investments in 50% or Less Owned Companies
Property Plant And Equipment [Line Items]
Equity method investment, ownership percentage			20%
Fast Support Vessel
Property Plant And Equipment [Line Items]
Impairment charges		$ 900
Platform Supply Vessels
Property Plant And Equipment [Line Items]
Payments to acquire property, plant, and equipment, including fair value hedges			$ 300
Equipment deliveries			$ 14,400
Number of equipment sold | Vessel				1
Platform Supply Vessels | SEACOR Marlin LLC
Property Plant And Equipment [Line Items]
Business acquisition ownership, percentage			100%
Anchor Handling Towing Supply Vessel
Property Plant And Equipment [Line Items]
Number of equipment sold | Vessel			1
Fast Support Vessels
Property Plant And Equipment [Line Items]
Number of equipment sold | Vessel			1	3
Liftboat
Property Plant And Equipment [Line Items]
Number of equipment sold | Vessel			1
Platform Supply Vessels And Fast Support Vessels
Property Plant And Equipment [Line Items]
Proceeds from disposition of property and equipment			$ 6,700	$ 25,000
Gain (loss) on disposition of property, plant and equipment			$ 2,200	$ 20,900
Windcat Workboats
Property Plant And Equipment [Line Items]
Proceeds from disposition of property and equipment	$ 38,715
Gain (loss) on disposition of property, plant and equipment	$ 22,756

Equipment Acquisitions and Di_4

Equipment Acquisitions and Dispositions - Schedule of Gain on Sale of Windcat Workboats (Details) - USD ($) $ in Thousands			9 Months Ended
	Sep. 29, 2022	Jan. 12, 2021	Sep. 30, 2022	Sep. 30, 2021
Property Plant And Equipment [Line Items]
Transactions Fees and other Costs	$ 1,159
Total Net Proceeds			$ 6,681	$ 30,137
Windcat Workboats
Property Plant And Equipment [Line Items]
Total Proceeds Received		$ 43,797
Transactions Fees and other Costs		1,562
Cash Sold		3,520
Total Net Proceeds		38,715
Less: Net Equity in Windcat Workboats, net of cash sold		15,790
Less: January Income on Discontinued Operations		169
Gain on Sale of Windcat Workboats		$ 22,756

Investments, at Equity, and A_3

Investments, at Equity, and Advances to 50% or Less Owned Companies - Schedule of Equity Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Schedule Of Investments [Line Items]
Investments at equity	$ 1,901	$ 71,727
MexMar
Schedule Of Investments [Line Items]
Ownership percentage	49%
Investments at equity		59,940
SEACOR Marlin LLC
Schedule Of Investments [Line Items]
Ownership percentage	49%
Investments at equity		6,958
Seabulk Angola
Schedule Of Investments [Line Items]
Ownership percentage	49%
Investments at equity	$ 1,688	1,081
Offshore Vessel Holdings
Schedule Of Investments [Line Items]
Ownership percentage	49%
Investments at equity		1,847
SEACOR Arabia
Schedule Of Investments [Line Items]
Ownership percentage	45%
Investments at equity	$ 137	1,821
Other Offshore Marine Services Joint Ventures
Schedule Of Investments [Line Items]
Investments at equity	$ 76	$ 80	$ 77,400
Other Offshore Marine Services Joint Ventures | Minimum
Schedule Of Investments [Line Items]
Ownership percentage	20%
Other Offshore Marine Services Joint Ventures | Maximum
Schedule Of Investments [Line Items]
Ownership percentage	50%		50%

Investments, at Equity, and A_4

Investments, at Equity, and Advances to 50% or Less Owned Companies - Additional Information (Details) - USD ($) $ in Thousands		9 Months Ended
	Sep. 29, 2022	Sep. 30, 2022	Sep. 30, 2021
Schedule Of Investments [Line Items]
Proceeds from sale of investment in equity investees	$ 66,000	$ 66,000	$ 0
Gain on sale recognized, amount	$ 788
OTM | Prior to the Closing of the Framework Agreement Transactions
Schedule Of Investments [Line Items]
Ownership percentage	51%
MexMar
Schedule Of Investments [Line Items]
Equity method investment, ownership percentage		49%
MexMar | Prior to the Closing of the Framework Agreement Transactions
Schedule Of Investments [Line Items]
Equity method investment, ownership percentage	49%
OVH
Schedule Of Investments [Line Items]
Equity method investment, ownership percentage		49%
OVH | Prior to the Closing of the Framework Agreement Transactions
Schedule Of Investments [Line Items]
Equity method investment, ownership percentage	49%

Investments, at Equity, and A_5

Investments, at Equity, and Advances to 50% or Less Owned Companies - Schedule of Gain on Sale of Equity Investments (Details) - USD ($) $ in Thousands		9 Months Ended
	Sep. 29, 2022	Sep. 30, 2022	Sep. 30, 2021
Schedule Of Investments [Abstract]
Proceeds from sale of investment in equity investees	$ 66,000	$ 66,000	$ 0
51% ownership in SEACOR Marlin Joint Venture	7,000
Hybrid Battery Equipment	1,394
Transactions Fees and other Costs	1,159
Total Net Proceeds	73,235
Less: Net Equity in MexMar and OVH Joint Ventures	65,546
Less: Net Book Value of SEACOR Davis	5,507
Less: OVH Note Receivable	1,394
Gain on Sale of MexMar, OVH and Other Assets	$ 788

Long Term Debt - Schedule of Lo

Long Term Debt - Schedule of Long-term Debt Obligations (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 371,426	$ 400,955
Current portion due within one year	(57,567)	(31,602)
Unamortized debt discount	(28,154)	(33,398)
Deferred financing costs	(3,149)	(3,193)
Long-term debt, less current portion	282,556	332,762
Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	365,926	395,455
Non-Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	5,500	5,500
Old Convertible Notes | Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	125,000	125,000
SEACOR Marine Foreign Holdings Credit Facility | Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	71,313	86,470
Sea-Cat Crewzer III Term Loan Facility | Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	16,703	19,178
SEACOR Offshore Delta (f/k/a SEACOSCO) Acquisition Debt | Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	16,205	18,705
SEACOR Delta (f/k/a SEACOSCO) Shipyard Financing | Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	79,759	86,316
SEACOR Alpine Shipyard Financing | Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	28,484	29,734
SEACOR 88/888 Term Loan | Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	5,500	5,500
SEACOR 88/888 Term Loan | Non-Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	5,500	5,500
SEACOR Offshore OSV | Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	16,823	18,052
Tarahumara Shipyard Financing | Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 6,139	$ 6,500

Long Term Debt - Additional Inf

Long Term Debt - Additional Information (Details) - USD ($)				3 Months Ended			9 Months Ended
	Oct. 05, 2022	Sep. 29, 2022	Aug. 02, 2022	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Class of warrant or right, exercise price of warrants or rights					$ 0.01		$ 0.01
Cash and Cash Equivalents, Percentage							24.60%
Cash and Cash Equivalents					$ 71,300,000		$ 71,300,000
Long-term Debt Obligation
Debt Instrument [Line Items]
Letters of credit outstanding, amount					1,100,000		1,100,000
Subsequent Event | Carlyle Warrants
Debt Instrument [Line Items]
Class of warrant or right, exercise price of warrants or rights	$ 0.01
Convertible Senior Notes due 2023 (Old Convertible Notes)
Debt Instrument [Line Items]
Convertible debt, total					$ 125,000,000		$ 125,000,000
Senior PIK Toggle Notes due 2026 | Subsequent Event
Debt Instrument [Line Items]
Convertible debt, total	$ 90,000,000
Convertible Senior Notes due 2026 | Subsequent Event
Debt Instrument [Line Items]
Convertible debt, total	$ 35,000,000
Debt instrument percentage	4.25%
Guaranteed Notes | Subsequent Event
Debt Instrument [Line Items]
Debt instrument, redemption, description	SEACOR Marine may redeem some or all of the Guaranteed Notes at any time in minimum denominations of $10.0 million, upon not less than 30 nor more than 60 calendar days’ notice, at a price equal to (a) 102% of the principal amount of the Guaranteed Notes redeemed, if redeemed prior to October 1, 2023, (b) 101% of the principal amount of the Guaranteed Notes redeemed, if redeemed on or after October 1, 2023, but prior to October 1, 2024 and (c) 100% of the principal amount of the Guaranteed Notes redeemed, if redeemed on or after October 1, 2024, in each case plus accrued and unpaid interest, if any, to, but not including, the redemption date, provided, SEACOR Marine may not redeem the Guaranteed Notes if the principal amount of Guaranteed Notes and New Convertible Notes outstanding will be equal to or less than $50.0 million in the aggregate, unless SEACOR Marine redeems all of the Guaranteed Notes in whole.
Convertible notes outstanding	$ 50,000,000
Guaranteed Notes | Subsequent Event | Redeemed Prior to October 1, 2023
Debt Instrument [Line Items]
Redemption, percentage of principal amount	102%
Guaranteed Notes | Subsequent Event | Redeemed On or After October 1, 2024
Debt Instrument [Line Items]
Redemption, percentage of principal amount	100%
Guaranteed Notes | Subsequent Event | Redeemed On or After October 1, 2023 but Prior to October 1, 2024
Debt Instrument [Line Items]
Redemption, percentage of principal amount	101%
Guaranteed Notes | Subsequent Event | Cash Interest
Debt Instrument [Line Items]
Debt instrument percentage	8%
Guaranteed Notes | Subsequent Event | Hybrid Interest
Debt Instrument [Line Items]
Debt instrument percentage	9.50%
Guaranteed Notes | Subsequent Event | Hybrid Interest Payment in Kind
Debt Instrument [Line Items]
Debt instrument percentage	5.25%
Guaranteed Notes | Subsequent Event | Hybrid Interest Payment in Cash
Debt Instrument [Line Items]
Debt instrument percentage	4.25%
Old Convertible Notes | Subsequent Event
Debt Instrument [Line Items]
Redemption, percentage of principal amount	4.25%
Maturity date	Jul. 01, 2026
Debt instrument, convertible, conversion rate	85.1064
Debt instrument, face amount	$ 1,000
Debt instrument, convertible, conversion price	$ 11.75
Debt instrument, conversion description	SEACOR Marine has the right to cause the mandatory conversion of the New Convertibles Notes into Common Stock if the daily VWAP of the Common Stock equals or exceeds (A) in the case of New Convertible Notes held by affiliates of Carlyle, 150% of the Conversion Price and (B) in the case of New Convertible Notes held by any Person other than Carlyle, 115% of the Conversion Price, in each case for each of the 20 consecutive trading days.
Debt instrument, percentage of new convertible notes to be purchased	100%
Debt instrument, percentage of new convertible notes to be redeemed	100%
Old Convertible Notes | Subsequent Event | Carlyle
Debt Instrument [Line Items]
Debt instrument, conversion price percentage	150%
Old Convertible Notes | Subsequent Event | Other Than Carlyle
Debt Instrument [Line Items]
Debt instrument, conversion price percentage	115%
SEACOR Marine Foreign Holdings Credit Facility
Debt Instrument [Line Items]
Prepayment of credit facility		$ 5,300,000
Line of credit facility, outstanding amount		$ 74,700,000
Cash and Cash Equivalents, Percentage					35%	35%
SEACOR Marine Foreign Holdings Credit Facility | Forecast
Debt Instrument [Line Items]
Cash and Cash Equivalents, Percentage				35%
SEACOR Marine Foreign Holdings Credit Facility | Tranche A
Debt Instrument [Line Items]
Maturity date		Sep. 30, 2023
Loan principal amount		$ 19,800,000
SEACOR Marine Foreign Holdings Credit Facility | Tranche B
Debt Instrument [Line Items]
Loan principal amount		$ 54,900,000
SEACOR Marine Foreign Holdings Credit Facility | SOFR | Tranche B
Debt Instrument [Line Items]
Maturity date		Sep. 30, 2023
Margin percentage		4.75%
Debt Instrument, extended maturity date		Mar. 31, 2026
SEACOR 88/888 Term Loan
Debt Instrument [Line Items]
Long-term debt			$ 5,500,000
Percentage of debt obligations outstanding			50%
Minimum | Senior PIK Toggle Notes due 2026 | Subsequent Event
Debt Instrument [Line Items]
Debt instrument percentage	8%
Minimum | Guaranteed Notes | Subsequent Event
Debt Instrument [Line Items]
Notes redeemable denomination amount	$ 10,000,000
Minimum | SEACOR Marine Foreign Holdings Credit Facility
Debt Instrument [Line Items]
Cash and Cash Equivalents, Percentage							7.50%
Cash and Cash Equivalents					$ 35,000,000		$ 35,000,000
Minimum | SEACOR Marine Foreign Holdings Credit Facility | Tranche A
Debt Instrument [Line Items]
Margin percentage		3.75%
Minimum | SEACOR 88/888 Term Loan | SOFR
Debt Instrument [Line Items]
Interest rate margin			3.75%
Maximum | Senior PIK Toggle Notes due 2026 | Subsequent Event
Debt Instrument [Line Items]
Debt instrument percentage	9.50%
Maximum | SEACOR Marine Foreign Holdings Credit Facility | Tranche A
Debt Instrument [Line Items]
Margin percentage								4.75%
Maximum | SEACOR 88/888 Term Loan | SOFR
Debt Instrument [Line Items]
Interest rate margin			4.75%

Leases - Additional Information

Leases - Additional Information (Details)	9 Months Ended
	Sep. 30, 2022 Vessel
Anchor Handling Towing Supply Vessels
Lessee Lease Description [Line Items]
Number of operating leases on equipment	2
Fast Support Vessel
Lessee Lease Description [Line Items]
Number of financing leases on equipment	1
Vessels | Minimum
Lessee Lease Description [Line Items]
Operating and finance lease, lease terms (in duration)	6 months
Vessels | Maximum
Lessee Lease Description [Line Items]
Operating and finance lease, lease terms (in duration)	54 months
Other Equipment | Minimum
Lessee Lease Description [Line Items]
Operating lease, lease terms (in duration)	2 months
Other Equipment | Maximum
Lessee Lease Description [Line Items]
Operating lease, lease terms (in duration)	291 months

Leases - Summary of Future Mini

Leases - Summary of Future Minimum Payments For Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Operating Leases
Remainder of 2022	$ 643
2023	1,646
2024	464
2025	515
2026	459
Years subsequent to 2026	3,614
Operating lease payments due	7,341
Interest component	(1,790)
Total operating leases	5,551
Current portion of operating lease liabilities	1,792	$ 1,986
Long-term lease liabilities	3,759	4,885
Finance Leases
Remainder of 2022	114
2023	726
2024	946
2025	959
2026	953
Years subsequent to 2026	4,659
Total finance leases	8,357
Interest component	(1,067)
Finance Leases	7,290
Current portion of financing lease liabilities	374	33
Long-term lease liabilities	$ 6,916	$ 76

Leases - Summary of Components

Leases - Summary of Components of Leases Expense (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Leases [Abstract]
Operating lease cost		$ 967	$ 875	$ 2,664	$ 2,730
Finance lease cost:
Amortization of finance lease assets	[1]	162	9	384	19
Interest on lease liabilities	[2]	73	1	174	2
Short-term lease costs		201	234	572	691
Total Lease expense		$ 1,403	$ 1,119	$ 3,794	$ 3,442
[1]Included in amortization costs in the consolidated statements of income (loss)[2]Included in interest expense in the consolidated statements of income (loss)

Leases - Summary of Supplementa

Leases - Summary of Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Leases [Abstract]
Operating cash outflows from operating leases	$ 1,656
Financing cash outflows from finance leases	237	$ 21
Right-of-use assets obtained for operating lease liabilities	163
Right-of-use assets obtained for finance lease liabilities	$ 7,248

Leases - Summary of Other Infor

Leases - Summary of Other Information Related to Leases (Details)	Sep. 30, 2022
Leases [Abstract]
Weighted average remaining lease term, in years - operating leases	11 years 1 month 6 days
Weighted average remaining lease term, in years - finance leases	4 years 6 months
Weighted average discount rate - operating leases	5.50%
Weighted average discount rate - finance leases	4%

Income Taxes - Schedule of Effe

Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)	9 Months Ended
	Sep. 30, 2022
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory rate	21%
Foreign withholding tax and foreign losses for which there is no benefit in the U.S.	(14.97%)
Sale of investments in equity investees	(12.96%)
Other	(0.37%)
Effective income tax rate	(7.30%)

Derivative Instruments and He_3

Derivative Instruments and Hedging Strategies - Schedule of Fair Value of Derivative Assets and Liabilities (Details) - Designated as Hedging Instrument - Cash Flow Hedging - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Derivative Assets	$ 472
Derivative Liability		$ 1,831
Interest Rate Swap
Derivative [Line Items]
Derivative Assets	$ 472
Derivative Liability		$ 1,831

Derivative Instruments and He_4

Derivative Instruments and Hedging Strategies - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Derivative [Line Items]
Derivative gains (losses) on cash flow hedges	$ 365	$ (54)	$ 1,521	$ (22)
Equity Investments in 50% or Less Owned Companies | Maximum
Derivative [Line Items]
Equity method investment, ownership percentage	50%	50%	50%	50%
Equity Investments in 50% or Less Owned Companies | Minimum
Derivative [Line Items]
Equity method investment, ownership percentage	20%		20%
Equity Investments in 50% or Less Owned Companies | Minimum | SEACOR Marine Foreign Holdings
Derivative [Line Items]
Equity method investment, ownership percentage	50%		50%
Cash Flow Hedging
Derivative [Line Items]
Derivative gains (losses) on cash flow hedges			$ 2,300	$ 1,600
Cash Flow Hedging | 3.32% Interest Rate Swap Agreement | Designated as Hedging Instrument | SEACOR Marine Foreign Holdings
Derivative [Line Items]
Derivative, fixed interest rate	3.32%		3.32%
Derivative, notional amount	$ 6,100		$ 6,100
Cash Flow Hedging | 3.195% Interest Rate Swap Agreement | Designated as Hedging Instrument | SEACOR Marine Foreign Holdings
Derivative [Line Items]
Derivative, fixed interest rate	3.195%		3.195%
Derivative, notional amount	$ 33,300		$ 33,300
Cash Flow Hedging | Interest Rate Swap | Designated as Hedging Instrument | SEACOR 88/888
Derivative [Line Items]
Derivative, fixed interest rate	3.175%		3.175%
Derivative, notional amount	$ 5,500		$ 5,500

Derivative Instruments and He_5

Derivative Instruments and Hedging Strategies - Schedule of Gains (Losses) on Derivative Instruments not Designated as Hedging Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2021
Derivative [Line Items]
Gains (losses) on derivative instruments	$ 1	$ 3	$ 387
Embedded Derivative Financial Instruments
Derivative [Line Items]
Gains (losses) on derivative instruments	$ 1	$ 3	(3)
Foreign Exchange Option
Derivative [Line Items]
Gains (losses) on derivative instruments			$ 390

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Details) - Fair Value, Inputs, Level 2 - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Assets	$ 472
Derivative Liability		$ 1,831

Fair Value Measurements - Sch_2

Fair Value Measurements - Schedule of Estimated Fair Values of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Reported Value Measurement
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash, cash equivalents and restricted cash	$ 50,810	$ 41,220
Long-term debt, including current portion	340,123	364,364
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash, cash equivalents and restricted cash	50,810	41,220
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, including current portion	$ 336,346	$ 372,992

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) PropertyandEquipment
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Impairment charges			$ 3,400,000		$ 0
Impairment of long-lived assets owned or leased in vessels			3,400,000	$ 0
Number of property and equipment with fair value | PropertyandEquipment					0
Fast Support Vessel
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Impairment of long-lived assets held for sale		$ 900,000
Anchor Handling Towing Supply Vessel
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Impairment of long-lived assets owned or leased in vessels	$ 1,200,000
Tower and Gangway
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Impairment of long-lived assets held for sale			$ 1,300,000

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) R$ in Thousands, $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2022 BRL (R$)
Commitments And Contingencies [Line Items]
Unrecorded unconditional purchase obligation, total	$ 1.1
Unrecorded unconditional purchase obligation, due in remainder of fiscal year	0.3
Unrecorded unconditional purchase obligation, due in next fiscal year	0.8
Unrecorded unconditional purchase obligation indefinitely deferred	$ 9.4
Deficiency Notice
Commitments And Contingencies [Line Items]
Cost allocation percentage	70%
Deficiency Notice | Seabulk Overseas
Commitments And Contingencies [Line Items]
Cost allocation percentage	30%
Minimum | Deficiency Notice
Commitments And Contingencies [Line Items]
Potential range of levies	$ 3.7	R$ 20100
Maximum | Deficiency Notice
Commitments And Contingencies [Line Items]
Potential range of levies	$ 2.4	R$ 12870
FSV Offshore Support Vessels
Commitments And Contingencies [Line Items]
Unrecorded unconditional purchase obligation, maximum quantity	1	1

Stock Based Compensation - Sche

Stock Based Compensation - Schedule of Equity Incentive Plan Transactions (Details)	9 Months Ended
	Sep. 30, 2022 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding as of the beginning of year (in shares)	1,061,357
Exercised (in shares)	(34,492)
Outstanding as of the end of year (in shares)	1,026,865
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding as of the beginning of year (in shares)	1,163,090
Granted (in shares)	999,619
Vested (in shares)	(514,002)
Forfeited (in shares)	(3,500)
Outstanding as of the end of year (in shares)	1,645,207	[1]
[1] Excludes 253,158 grants

Stock Based Compensation - Sc_2

Stock Based Compensation - Schedule of Equity Incentive Plan Transactions (Details) (Parenthetical)	Sep. 30, 2022 shares
Performance Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares outstanding	253,158

Stock Based Compensation - Addi

Stock Based Compensation - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Treasury stock, shares acquired	120,751
Treasury stock, value acquired cost method	$ 672	$ 272

Segment Information - Schedule

Segment Information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2022		Sep. 30, 2021		Sep. 30, 2022		Sep. 30, 2021		Dec. 31, 2021
Segment Reporting Information [Line Items]
Operating Revenues	$ 59,791		$ 43,663		$ 159,399		$ 122,974
Direct Costs and Expenses	44,006		33,448		127,647		92,370
Direct Vessel Profit (Loss)	15,785		10,215		31,752		30,604
Lease expense	1,168		1,109		3,236		3,421
Administrative and general	9,978		9,134		30,112		26,897
Depreciation and amortization	13,754		14,306		42,333		43,197
Other Costs and Expenses	24,900		24,549		75,681		73,515
(Losses) Gains on Asset Dispositions and Impairments, Net	(1,783)		56		381		20,436
Operating Loss	(10,898)		(14,278)		(43,548)		(22,475)
Historical cost	992,423		989,910		992,423		989,910		$ 1,008,080
Accumulated depreciation	(321,898)		(303,178)		(321,898)		(303,178)		(302,328)
Property and equipment	670,525		686,732		670,525		686,732		$ 705,752
Total Assets	763,144	[1]	798,334	[2]	763,144	[1]	798,334	[2]
Time Charter
Segment Reporting Information [Line Items]
Operating Revenues	56,500		41,782		148,745		117,546
Bareboat Charter
Segment Reporting Information [Line Items]
Operating Revenues	332				998		1,163
Other Marine Services
Segment Reporting Information [Line Items]
Operating Revenues	2,959		1,881		9,656		4,265
Personnel
Segment Reporting Information [Line Items]
Direct Costs and Expenses	20,152		15,051		56,933		42,822
Repairs and Maintenance
Segment Reporting Information [Line Items]
Direct Costs and Expenses	7,377		6,536		22,548		17,335
Drydocking
Segment Reporting Information [Line Items]
Direct Costs and Expenses	5,046		771		16,493		5,780
Insurance and Loss Reserves
Segment Reporting Information [Line Items]
Direct Costs and Expenses	2,850		2,189		6,581		6,808
Fuel, Lubes and Supplies
Segment Reporting Information [Line Items]
Direct Costs and Expenses	5,416		3,684		13,495		8,779
Other Direct Costs and Expenses
Segment Reporting Information [Line Items]
Direct Costs and Expenses	3,165		5,217		11,597		10,846
UNITED STATES
Segment Reporting Information [Line Items]
Operating Revenues	19,236		6,504		41,310		13,848
Direct Costs and Expenses	13,633		4,801		37,055		12,963
Direct Vessel Profit (Loss)	5,603		1,703		4,255		885
Lease expense	278		621		860		1,988
Depreciation and amortization	4,332		3,936		13,532		11,387
Historical cost	259,472		248,125		259,472		248,125
Accumulated depreciation	(122,340)		(122,437)		(122,340)		(122,437)
Property and equipment	137,132		125,688		137,132		125,688
Total Assets	177,463	[1]	149,286	[2]	177,463	[1]	149,286	[2]
UNITED STATES | Time Charter
Segment Reporting Information [Line Items]
Operating Revenues	17,075		5,289		34,698		10,197
UNITED STATES | Bareboat Charter
Segment Reporting Information [Line Items]
Operating Revenues	0				0		1,163
UNITED STATES | Other Marine Services
Segment Reporting Information [Line Items]
Operating Revenues	2,161		1,215		6,612		2,488
UNITED STATES | Personnel
Segment Reporting Information [Line Items]
Direct Costs and Expenses	7,243		2,428		17,939		5,700
UNITED STATES | Repairs and Maintenance
Segment Reporting Information [Line Items]
Direct Costs and Expenses	2,002		1,266		4,383		2,309
UNITED STATES | Drydocking
Segment Reporting Information [Line Items]
Direct Costs and Expenses	1,549		239		8,506		1,891
UNITED STATES | Insurance and Loss Reserves
Segment Reporting Information [Line Items]
Direct Costs and Expenses	1,382		462		2,809		1,912
UNITED STATES | Fuel, Lubes and Supplies
Segment Reporting Information [Line Items]
Direct Costs and Expenses	1,143		259		2,599		703
UNITED STATES | Other Direct Costs and Expenses
Segment Reporting Information [Line Items]
Direct Costs and Expenses	314		147		819		448
Africa and Europe, Continuing Operations
Segment Reporting Information [Line Items]
Operating Revenues	17,611		10,017	[3]	45,277		31,463	[3]
Direct Costs and Expenses	11,410		8,402	[3]	31,082		24,834	[3]
Direct Vessel Profit (Loss)	6,201		1,615	[3]	14,195		6,629	[3]
Lease expense	455		284	[3]	1,313		910	[3]
Depreciation and amortization	3,461		3,296	[3]	10,025		9,908	[3]
Historical cost	247,967		212,491	[3]	247,967		212,491	[3]
Accumulated depreciation	(80,069)		(66,424)	[3]	(80,069)		(66,424)	[3]
Property and equipment	167,898		146,067	[3]	167,898		146,067	[3]
Total Assets	187,495	[1]	162,815	[2],[3]	187,495	[1]	162,815	[2],[3]
Africa and Europe, Continuing Operations | Time Charter
Segment Reporting Information [Line Items]
Operating Revenues	17,551		10,446	[3]	44,761		32,385	[3]
Africa and Europe, Continuing Operations | Bareboat Charter
Segment Reporting Information [Line Items]
Operating Revenues	0				0		0	[3]
Africa and Europe, Continuing Operations | Other Marine Services
Segment Reporting Information [Line Items]
Operating Revenues	60		(429)	[3]	516		(922)	[3]
Africa and Europe, Continuing Operations | Personnel
Segment Reporting Information [Line Items]
Direct Costs and Expenses	4,694		3,147	[3]	11,756		10,620	[3]
Africa and Europe, Continuing Operations | Repairs and Maintenance
Segment Reporting Information [Line Items]
Direct Costs and Expenses	2,110		1,540	[3]	6,327		4,926	[3]
Africa and Europe, Continuing Operations | Drydocking
Segment Reporting Information [Line Items]
Direct Costs and Expenses	383		337	[3]	1,661		1,015	[3]
Africa and Europe, Continuing Operations | Insurance and Loss Reserves
Segment Reporting Information [Line Items]
Direct Costs and Expenses	359		323	[3]	812		1,108	[3]
Africa and Europe, Continuing Operations | Fuel, Lubes and Supplies
Segment Reporting Information [Line Items]
Direct Costs and Expenses	2,284		1,631	[3]	5,247		3,090	[3]
Africa and Europe, Continuing Operations | Other Direct Costs and Expenses
Segment Reporting Information [Line Items]
Direct Costs and Expenses	1,580		1,424	[3]	5,279		4,075	[3]
Middle East and Asia
Segment Reporting Information [Line Items]
Operating Revenues	12,031		13,502		40,106		40,220
Direct Costs and Expenses	13,339		11,922		39,073		32,458
Direct Vessel Profit (Loss)	(1,308)		1,580		1,033		7,762
Lease expense	35		377		104		434
Depreciation and amortization	3,974		4,456		12,548		13,829
Historical cost	305,880		358,356		305,880		358,356
Accumulated depreciation	(91,906)		(85,054)		(91,906)		(85,054)
Property and equipment	213,974		273,302		213,974		273,302
Total Assets	231,165	[1]	274,324	[2]	231,165	[1]	274,324	[2]
Middle East and Asia | Time Charter
Segment Reporting Information [Line Items]
Operating Revenues	11,712		13,417		39,278		39,744
Middle East and Asia | Bareboat Charter
Segment Reporting Information [Line Items]
Operating Revenues	0				0		0
Middle East and Asia | Other Marine Services
Segment Reporting Information [Line Items]
Operating Revenues	319		85		828		476
Middle East and Asia | Personnel
Segment Reporting Information [Line Items]
Direct Costs and Expenses	5,384		5,849		17,106		16,435
Middle East and Asia | Repairs and Maintenance
Segment Reporting Information [Line Items]
Direct Costs and Expenses	1,776		1,610		6,153		5,319
Middle East and Asia | Drydocking
Segment Reporting Information [Line Items]
Direct Costs and Expenses	3,113		156		6,325		2,407
Middle East and Asia | Insurance and Loss Reserves
Segment Reporting Information [Line Items]
Direct Costs and Expenses	762		707		2,017		1,870
Middle East and Asia | Fuel, Lubes and Supplies
Segment Reporting Information [Line Items]
Direct Costs and Expenses	1,426		777		3,754		2,417
Middle East and Asia | Other Direct Costs and Expenses
Segment Reporting Information [Line Items]
Direct Costs and Expenses	878		2,823		3,718		4,010
Latin America
Segment Reporting Information [Line Items]
Operating Revenues	10,913		13,640		32,706		37,443
Direct Costs and Expenses	5,624		8,323		20,437		22,115
Direct Vessel Profit (Loss)	5,289		5,317		12,269		15,328
Lease expense	400		(173)		959		89
Depreciation and amortization	1,987		2,618		6,228		8,073
Historical cost	179,104		170,938		179,104		170,938
Accumulated depreciation	(27,583)		(29,263)		(27,583)		(29,263)
Property and equipment	151,521		141,675		151,521		141,675
Total Assets	167,021	[1]	211,909	[2]	167,021	[1]	211,909	[2]
Latin America | Time Charter
Segment Reporting Information [Line Items]
Operating Revenues	10,162		12,630		30,008		35,220
Latin America | Bareboat Charter
Segment Reporting Information [Line Items]
Operating Revenues	332				998		0
Latin America | Other Marine Services
Segment Reporting Information [Line Items]
Operating Revenues	419		1,010		1,700		2,223
Latin America | Personnel
Segment Reporting Information [Line Items]
Direct Costs and Expenses	2,831		3,627		10,132		10,067
Latin America | Repairs and Maintenance
Segment Reporting Information [Line Items]
Direct Costs and Expenses	1,489		2,120		5,685		4,781
Latin America | Drydocking
Segment Reporting Information [Line Items]
Direct Costs and Expenses	1		39		1		467
Latin America | Insurance and Loss Reserves
Segment Reporting Information [Line Items]
Direct Costs and Expenses	347		697		943		1,918
Latin America | Fuel, Lubes and Supplies
Segment Reporting Information [Line Items]
Direct Costs and Expenses	563		1,017		1,895		2,569
Latin America | Other Direct Costs and Expenses
Segment Reporting Information [Line Items]
Direct Costs and Expenses	$ 393		$ 823		$ 1,781		$ 2,313
[1]Total assets by region does not include corporate assets of $79.8 million as of September 30, 2022[2]Total assets by region does not include corporate assets of $103.7

Segment Information - Schedul_2

Segment Information - Schedule of Segment Reporting Information, by Segment (Parenthetical) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Segment Reporting Information [Line Items]
Assets, Total	$ 842,993	$ 912,502
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Assets, Total	$ 79,800		$ 103,700

Segment Information - Additiona

Segment Information - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Segment Information [Line Items]
Equity method investments	$ 1,901		$ 71,727
Equity in Gains (Losses) Earnings of 50% or Less Owned Companies	$ 5,800	$ 10,600
Equity Investments in 50% or Less Owned Companies | Maximum
Segment Information [Line Items]
Equity method investment, ownership percentage	50%	50%
Equity Investments in 50% or Less Owned Companies | Minimum
Segment Information [Line Items]
Equity method investment, ownership percentage	20%
Other Offshore Marine Services Joint Ventures
Segment Information [Line Items]
Equity method investments	$ 76	$ 77,400	$ 80
Other Offshore Marine Services Joint Ventures | Maximum
Segment Information [Line Items]
Equity method investment, ownership percentage	50%	50%
Other Offshore Marine Services Joint Ventures | Minimum
Segment Information [Line Items]
Equity method investment, ownership percentage	20%

Discontinued Operations - Addit

Discontinued Operations - Additional Information (Details) - USD ($) $ in Thousands		9 Months Ended
	Jan. 12, 2021	Sep. 30, 2021
Windcat Workboats Holdings Ltd | Discontinued Operations, Held-for-sale
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net income from operations	$ 200	$ 169

Discontinued Operations - Sched

Discontinued Operations - Schedule of Assets Held for Sale (Details) - Windcat Workboats Holdings Ltd - Discontinued Operations, Held-for-sale - USD ($) $ in Thousands		9 Months Ended
	Jan. 12, 2021	Sep. 30, 2021
Operating Revenues:
Operating Revenues		$ 973
Costs and Expenses:
Operating		578
Direct Vessel Profit		395
General and Administrative Expenses		238
Lease Expense		24
Total expenses		262
Operating Income		133
Other Income (Expense)
Interest income		2
Interest expense		(39)
Foreign currency translation loss		89
Other Income (Expense)		52
Operating Income Before Equity Earnings of 50% or Less Owned Companies, Net of Tax		185
Operating Income Before Equity Earnings of 50% or Less Owned Companies		185
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax		(16)
Net Income from Discontinued Operations	$ 200	169
Time Charter
Operating Revenues:
Operating Revenues		903
Other Revenue
Operating Revenues:
Operating Revenues		$ 70