SEACOR Marine (SMHI) 10-Q 3 Aug 22 2022 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2022	Jul. 29, 2022
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
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		26,705,661
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 (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Statement Of Financial Position [Abstract]
Trade receivables, allowance for credit loss	$ 1,842	$ 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)	26,954,299	26,120,124
Shares held in treasury (in shares)	248,638	127,887

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 22,608	$ 37,619
Restricted cash	3,296	3,601
Receivables:
Trade, net of allowance for credit loss accounts of $1,842 and $1,312 in 2022 and 2021, respectively	55,276	55,544
Other	7,437	6,118
Tax receivable	79	1,238
Inventories	1,723	928
Prepaid expenses and other	5,391	3,730
Total current assets	95,810	108,778
Property and Equipment:
Historical cost	1,000,147	1,025,284
Accumulated depreciation	(325,091)	(317,297)
Property and equipment	675,056	707,987
Construction in progress	15,576	15,531
Net property and equipment	690,632	723,518
Right-of-use asset - operating leases	5,686	6,608
Right-of-use asset - finance leases	7,131	100
Investments, at equity, and advances to 50% or less owned companies	75,923	71,727
Other assets	1,932	1,771
Total assets	877,114	912,502
Current Liabilities:
Current portion of operating lease liabilities	2,010	1,986
Current portion of financing lease liabilities	282	33
Current portion of long-term debt:
Recourse	33,398	31,602
Accounts payable and accrued expenses	39,262	28,419
Due to SEACOR Holdings	264	274
Accrued wages and benefits	3,259	3,711
Accrued interest	1,466	2,273
Deferred revenue and unearned revenue	1,369	1,606
Accrued capital, repair, and maintenance expenditures	8,208	2,438
Accrued insurance deductibles and premiums	2,325	2,720
Accrued professional fees	1,372	1,214
Derivatives	24	1,831
Other current liabilities	4,148	6,558
Total current liabilities	97,387	84,665
Long-term operating lease liabilities	4,026	4,885
Long-term financing lease liabilities	7,050	76
Long-term Debt:
Recourse	313,224	327,300
Non-recourse	5,475	5,462
Conversion option liability on convertible senior notes	1	0
Deferred income taxes	33,743	40,682
Deferred gains and other liabilities	2,701	2,891
Total liabilities	463,607	465,961
SEACOR Marine Holdings Inc. stockholders’ equity:
Common stock, $.01 par value, 60,000,000 shares authorized; 26,954,299 and 26,120,124 shares issued in 2022 and 2021, respectively	272	262
Additional paid-in capital	464,222	461,931
Accumulated deficit	(55,418)	(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	5,960	8,055
Total stockholders equity	413,184	446,221
Noncontrolling interests in subsidiaries	323	320
Total equity	413,507	446,541
Total liabilities and equity	$ 877,114	$ 912,502

Unaudited Condensed Consolidate

Unaudited Condensed Consolidated Statements of Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Operating Revenues	$ 54,017	$ 42,799	$ 99,608	$ 79,311
Costs and Expenses:
Operating	44,145	32,615	83,641	58,922
Administrative and general	10,210	9,152	20,134	17,763
Lease expense	1,008	1,234	2,068	2,312
Depreciation and amortization	14,208	14,093	28,579	28,891
Costs and expenses	69,571	57,094	134,422	107,888
Gains on Asset Dispositions and Impairments, Net	25	22,653	2,164	20,380
Operating (Loss) Income	(15,529)	8,358	(32,650)	(8,197)
Other Income (Expense):
Interest income	190	135	219	1,121
Interest expense	(6,989)	(7,310)	(13,616)	(15,328)
SEACOR Holdings guarantee fees	0	0	0	(7)
Gain on debt extinguishment	0	61,994	0	61,994
Derivative gains (losses), net	33	30	(1)	385
Foreign currency gains (losses), net	1,170	(657)	1,991	(1,123)
Other, net	(41)	(1)	(41)	(1)
Nonoperating income expense	(5,637)	54,191	(11,448)	47,041
(Loss) Income from Continuing Operations Before Income Tax Expense (Benefit) and Equity in Earnings of 50% or Less Owned Companies	(21,166)	62,549	(44,098)	38,844
Income Tax (Benefit) Expense	(1,634)	15,915	(4,055)	13,227
(Loss) Income from Continuing Operations Before Equity in Earnings of 50% or Less Owned Companies	(19,532)	46,634	(40,043)	25,617
Equity in Earnings Gains of 50% or Less Owned Companies	415	2,167	6,089	6,270
(Loss) Income from Continuing Operations	(19,117)	48,801	(33,954)	31,887
Income on Discontinued Operations, Net of Tax (see Note 12)	0	0	0	22,925
Net (Loss) Income	(19,117)	48,801	(33,954)	54,812
Net Income Attributable to Noncontrolling Interests in Subsidiaries	3	1	3	1
Net (Loss) Income Attributable to SEACOR Marine Holdings Inc.	$ (19,120)	$ 48,800	$ (33,957)	$ 54,811
Net (Loss) Income Per Common Share from Continuing Operations:
Basic	$ (0.72)	$ 1.92	$ (1.28)	$ 1.26
Diluted	(0.72)	1.79	(1.28)	1.26
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	(0.72)	1.92	(1.28)	2.16
Diluted	$ (0.72)	$ 1.79	$ (1.28)	$ 2.16
Weighted Average Common Stock and Warrants Outstanding:
Basic	26,664,745	25,435,362	26,522,808	25,370,372
Diluted	26,664,745	28,345,155	26,522,808	25,371,185

Unaudited Condensed Consolida_2

Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net (Loss) Income	$ (19,117)	$ 48,801	$ (33,954)	$ 54,812
Other Comprehensive Income:
Foreign currency translation (losses) gains	(3,849)	(70)	(4,563)	4,322
Derivative gains (losses) on cash flow hedges	351	(95)	1,156	32
Other comprehensive income (loss)	(2,893)	(339)	(2,095)	4,317
Comprehensive (Loss) Income	(22,010)	48,462	(36,049)	59,129
Comprehensive Income Attributable to Noncontrolling Interests in Subsidiaries	3	1	3	1
Comprehensive (Loss) Income attributable to SEACOR Marine Holdings Inc.	(22,013)	48,461	(36,052)	59,128
Interest Expense
Other Comprehensive Income:
Reclassification of derivative losses on cash flow hedges	267	415	637	830
Equity Method Investments
Other Comprehensive Income:
Reclassification of derivative losses on cash flow hedges	$ 338	$ (589)	$ 675	$ (867)

Unaudited Condensed Consolida_3

Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 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]	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	2,465				2,465
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
Sale Of Windcat Workboats	(4,202)							(4,202)
Net loss (income)	54,812							54,811		1
Other comprehensive income (loss)	4,317								4,317
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
Balance at Mar. 31, 2021	409,159		$ 243		452,290	$ (1,110)		(50,029)	7,446	319
Balance (in shares) at Mar. 31, 2021			24,194,383			125,217
Amortization of share awards	1,354				1,354
Restricted stock vesting	(10)					$ (10)
Restricted stock vesting (in shares)			(2,521)			2,521
Director share awards	437		$ 2		435
Director share awards (in shares)			189,030
Sale Of Windcat Workboats	(1)							(1)
Net loss (income)	48,801							48,800		1
Other comprehensive income (loss)	(339)								(339)
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
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	2,140				2,140
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
Net loss (income)	$ (33,954)							(33,957)		3
Other comprehensive income (loss)	(649)							1,446	(2,095)
Balance at Jun. 30, 2022	$ 413,507		$ 272		464,222	$ (1,852)		(55,418)	5,960	323
Balance (in shares) at Jun. 30, 2022	26,954,299		26,705,661			248,638
Balance at Mar. 31, 2022	$ 433,044		$ 269		463,138	$ (1,792)		(37,744)	8,853	320
Balance (in shares) at Mar. 31, 2022			26,643,873			242,138
Restricted stock grants	2		$ 2
Restricted stock grants (in shares)			5,001
Amortization of share awards	1,073				1,073
Exercise of options	11				11
Exercise of options (in shares)			2,500
Restricted stock vesting		(60)					$ (60)
Restricted stock vesting (in shares)				(6,500)			6,500
Director share awards		$ 1		$ 1
Director share awards (in shares)				60,787
Net loss (income)	(19,117)							(19,120)		3
Other comprehensive income (loss)	(1,447)							1,446	(2,893)
Balance at Jun. 30, 2022	$ 413,507		$ 272		$ 464,222	$ (1,852)		$ (55,418)	$ 5,960	$ 323
Balance (in shares) at Jun. 30, 2022	26,954,299		26,705,661			248,638

Unaudited Condensed Consolida_5

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021
Cash Flows from Continuing Operating Activities:
Net (Loss) Income		$ (33,954)	$ 54,812
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization		28,579	28,891
Deferred financing costs amortization		655	514
Stock-based compensation expense		1,408	2,628
Debt discount amortization		3,427	3,679
Allowance for credit losses		530	156
Gain from equipment sales, retirements or impairments		(2,164)	(20,380)
Gain on the sale of Windcat Workboats		0	(22,756)
Gain on debt extinguishment		0	(62,749)
Derivative losses (gains)		1	(385)
Interest on finance leases		98	2
Cash settlement payments on derivative transactions, net		(651)	(1,333)
Currency (gains) losses		(1,991)	1,123
Deferred income taxes		(6,939)	10,347
Equity earnings		(6,089)	(6,270)
Dividends received from equity investees		1,887	0
Changes in Operating Assets and Liabilities:
Accounts receivables		(571)	27,392
Other assets		(1,703)	(104)
Accounts payable and accrued liabilities		11,632	(6,028)
Net cash (used in) provided by operating activities		(5,845)	9,539
Cash Flows from Continuing Investing Activities:
Purchases of property and equipment		(37)	(3,650)
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)
Principal payments on notes due from equity investees		351	3,796
Net cash provided by investing activities		6,995	68,262
Cash Flows from Continuing Financing Activities:
Payments on long-term debt		(16,500)	(65,089)
Payments on debt extinguishment cost		0	(755)
Payments on finance leases		(123)	(12)
Proceeds from exercise of stock options		151	0
Issuance of stock		10	10
Net cash used in financing activities		(16,462)	(65,846)
Effects of Exchange Rate Changes on Cash and Cash Equivalents		(4)	(21)
Net (Decrease) Increase in Cash, Restricted Cash and Cash Equivalents		(15,316)	11,934
Cash Flows from Discontinued Operations:
Operating Activities		0	(171)
Investing Activities		0	0
Financing Activities		0	0
Net Decrease in Cash, Restricted Cash and Cash Equivalents on Discontinued Operations		0	(171)
Net (Decrease) Increase in Cash, Restricted Cash and Cash Equivalents		(15,316)	11,763
Cash, Restricted Cash and Cash Equivalents, Beginning of Period		41,220	39,538
Cash, Restricted Cash and Cash Equivalents, End of Period		25,904	51,301
Supplemental disclosures:
Cash paid for interest, excluding capitalized interest		10,341	11,745
Income taxes refunded, net		887	31,400
Noncash Investing and Financing Activities:
Decrease in debt related to debt settlement		0	62,749
Decrease in capital expenditures in accounts payable and accrued liabilities		0	3,947
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	6 Months Ended
	Jun. 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. Therefore, it will be in effect for a limited time through December 31, 2022. As of June 30, 2022, the reference rates for the Company’s existing debt and interest rate swaps have not changed as a result of any such amendment. The Company will continue to monitor changes to reference rates in applicable agreements and adopt 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 six months ended June 30, 2022 and six months ended June 30, 2021 were as follows (in thousands): 2022 2021 Balance at beginning of period $ 321 $ 3,307 Revenues deferred during the period — 50 Revenues recognized and reclassifications during the period (321 ) (1,374 ) Balance at end of period $ — $ 1,983 As of June 30, 2022, the Company had no deferred revenues. As of June 30, 2022 and December 31, 2021, the Company had unearned revenue $1.4 million and $1.3 million, respectively, primarily related to mobilizations of vessels. The Company recorded $1.1 million of unearned revenue related to new contract agreements and recognized previously recorded unearned revenue of $1.0 million during the six months ended June 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 June 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 six months ended June 30, 2022. During the six months ended June 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 six months ended June 30, 2022, 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. There were no impairments of other owned or leased-in vessels. For the six months ended June 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 June 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 has indicators of impairment and is deemed not recoverable through future operations, the Company determines 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 six months ended June 30, 2022 and 2021, the Company did not recognize any impairment charges related to its 50% or less owned companies. Income Taxes. During the six months ended June 30, 2022, the Company’s effective income tax rate of 9.20% was primarily due to foreign taxes not creditable against U.S. income taxes and foreign losses for which there is no benefit in the U.S. Accumulated Other Comprehensive Income (Loss). The components of accumulated other comprehensive loss 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 (4,563 ) 2,468 (2,095 ) Balance as of June 30, 2022 $ 6,220 $ (260 ) $ 5,960 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 Convertible Senior Notes (as defined in “Note 4. Long-Term Debt”) unless anti-dilutive. The Company’s Convertible Senior Notes (“Convertible Senior Notes”) are currently convertible into 2,907,500 shares of Common Stock. For the three and six months ended June 30, 2022, diluted loss per share of Common Stock excluded 2,907,500 issuable upon conversion of the Convertible Senior Notes and exercise of the related Warrants as the effect of their inclusion in the computation would be anti-dilutive. For the three months ended June 30, 2021, diluted earnings per share of Common Stock included 2,907,500 of the Convertible Senior Note Shares as the effect of their inclusion in the computation would be dilutive. For the six months ended June 30, 2021, diluted earnings per share of Common Stock excluded 2,907,500 of the Convertible Senior Note Shares as the effect of their inclusion in the computation would be antidilutive. The number of shares of Common Stock issuable upon conversion of the Convertible Senior Notes and exercise of the related Warrants excluded from the calculation of diluted earnings /loss per share was incorrectly reported in certain prior periods as 2,183,708 . This number of shares was adjusted in the period ended June 30, 2021 following revisions to the calculation. In addition, for the three and six months ended June 30, 2022 diluted loss per share of Common Stock excluded 1,648,707 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 three and six months ended June 30, 2021, diluted earnings per share of Common Stock included 2,294 and 813 shares of restricted stock, respectively, as their inclusion in the computation would be dilutive. For the three and six months ended June 30, 2021 diluted earnings per share of Common Stock excluded 1,134,947 and 1,136,428 shares of restricted stock, respectively, and 1,123,041 share of stock issuable upon exercise of outstanding stock options as their inclusion in the computation would be anti-dilutive. Subsequent events. The Company has evaluated subsequent events through August 3, 2022 , the date the financial statements were issued. Any material subsequent events that occurred during this time have been properly recognized and/or disclosed in these financial statements.

Equipment Acquisitions and Disp

Equipment Acquisitions and Dispositions	6 Months Ended
	Jun. 30, 2022
Property Plant And Equipment [Abstract]
Equipment Acquisitions and Dispositions	2 . EQUIPMENT ACQUISITIONS AND DISPOSITIONS During the six months ended June 30 $0.1 million. here were no e June 30 During the six months ended June 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 the FSV classified as held for sale during the first quarter of 2022 and sold during the second quarter of 2022. During the six months ended June 30, 2021, the Company sold one PSV and three FSVs and reduced $22.5 million of debt $30.1 million and gains of $20.9 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 12. 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	6 Months Ended
	Jun. 30, 2022
Schedule Of Investments [Abstract]
Investments, at Equity, and Advances to 50% or Less Owned Companies	3 . COMPANIES Investments, at equity, and advances to 50% or less owned companies as of June 30, 2022 and December 31, 2021 were as follows (in thousands): Ownership 2022 2021 MexMar 49.0 % $ 64,399 $ 59,940 SEACOR Marlin 49.0 % 6,078 6,958 Offshore Vessel Holdings 49.0 % 3,186 1,847 Other 20.0% - 50.0% 2,260 2,982 $ 75,923 $ 71,727

Long Term Debt

Long Term Debt	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
Long Term Debt	4 . The Company’s long-term debt obligations as of June 30, 2022 and December 31, 2021 were as follows (in thousands): June 30, 2022 December 31, 2021 Recourse long-term debt (1) Convertible Senior Notes $ 125,000 $ 125,000 SEACOR Marine Foreign Holdings Credit Facility 79,970 86,470 Sea-Cat Crewzer III Term Loan Facility 17,940 19,178 SEACOR Offshore Delta (f/k/a SEACOSCO) Acquisition Debt 16,205 18,705 SEACOR Delta (f/k/a SEACOSCO) Shipyard Financing 81,982 86,316 SEACOR Alpine Shipyard Financing 28,922 29,734 SEACOR 88/888 Term Loan 5,500 5,500 Tarahumara Shipyard Financing 6,500 6,500 SEACOR Offshore OSV 17,323 18,052 Total recourse long-term debt 379,342 395,455 Non-recourse long-term debt (2) SEACOR 88/888 Term Loan 5,500 5,500 Total non-recourse long-term debt 5,500 5,500 Total principal due for long-term debt 384,842 400,955 Current portion due within one year (33,398 ) (31,602 ) Unamortized debt discount (29,971 ) (33,398 ) Deferred financing costs (2,774 ) (3,193 ) Long-term debt, less current portion $ 318,699 $ 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. As of June 30, 2022, the Company was in compliance with all debt covenants and lender requirements. SEACOR Marine Foreign Holdings Credit Facility. On June 15, 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. 4 (“SMFH Amendment No. 4”) to that certain $130.0 million loan facility with a syndicate of lenders administered by DNB Bank ASA, New York Branch, dated as of September 26, 2018 and as amended on August 6, 2019, November 26, 2019, December 13, 2019 and June 29, 2020 (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 Guaranty”). SMFH Amendment No. 4 and the A&R SMFH Guaranty provide for, among other things, (i) an increase in the Margin (as defined in the SMFH Credit Facility) from 3.75% per annum to 4.75% per annum through December 31, 2022 at which point the Margin will revert to 3.75% and (ii) the modification of certain financial maintenance and restrictive covenants contained in the A&R SMFH Guaranty, including the amendment of the definition of Cash and Cash Equivalents (as defined in the A&R SMFH 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 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 Guaranty). As of June 30, 2022, the Company's Cash and Cash Equivalents balance used to test compliance with this covenant was $45.3 million or 15.0% 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, and (ii) the amendment of the applicable interest rate margin over SOFR from 3.75 % to 4.75 % . Letters of Credit . As of June 30, 2022, the Company had outstanding letters of credit of $1.1 million securing lease obligations, labor and performance guaranties.

Leases

Leases	6 Months Ended
	Jun. 30, 2022
Leases [Abstract]
Leases	5 . LEASES As of June 30, 2022, the Company leased-in two anchor handling towing supply (“AHTS”) vessels, 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 June 30, 2022, the remaining lease terms of the vessels had a duration ranging from 9 to 57 months. The lease terms of certain facilities and other equipment range in duration from 5 to 294 months. As of June 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 $ 1,201 $ 228 2023 1,646 726 2024 464 946 2025 515 959 2026 459 953 Years subsequent to 2026 3,614 4,659 7,899 8,471 Interest component (1,863 ) (1,139 ) 6,036 7,332 Current portion of long-term lease liabilities 2,010 282 Long-term lease liabilities $ 4,026 $ 7,050 For the six months ended June 30, 2022 and 2021 the components of lease expense were as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Operating lease cost $ 789 $ 950 $ 1,697 $ 1,855 Finance lease cost: Amortization of finance lease assets (1) 163 1 222 9 Interest on finance lease liabilities (2) 76 1 101 1 Short-term lease costs 219 284 371 457 $ 1,247 $ 1,236 $ 2,391 $ 2,322 (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 six months ended June 30, 2022 supplemental cash flow information related to leases was as follows (in thousands): 2022 Operating cash outflows from operating leases 1,098 Financing cash outflows from finance leases 123 Right-of-use assets obtained for operating lease liabilities 163 Right-of-use assets obtained for finance lease liabilities 7,248 For the six months ended June 30, 2022 other information related to leases was as follows: 2022 Weighted average remaining lease term, in years - operating leases 10.7 Weighted average remaining lease term, in years - finance leases 4.7 Weighted average discount rate - operating leases 5.4 % Weighted average discount rate - finance leases 4.0 %

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes	6 . The following table reconciles the difference between the statutory federal income tax rate for the Company and the effective income tax rate for the six months ended June 30, 2022: Statutory rate 21.00 % Foreign withholding tax and foreign losses for which there is no benefit in the U.S. (11.53 )% Other (0.27 )% Effective income tax rate 9.20 %

Derivative Instruments and Hedg

Derivative Instruments and Hedging Strategies	6 Months Ended
	Jun. 30, 2022
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Strategies	7 . Derivative instruments are classified as either assets or liabilities based on their individual fair values. The fair values of the Company’s derivative instruments were as follows (in thousands): June 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) $ — $ 24 $ — $ 1,831 — 24 — 1,831 Derivatives not designated as hedging instruments: Conversion option liability on Convertible Senior Notes — 1 — — $ — $ 1 $ — $ — 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 June 30, 2022, the Company had no open forward currency exchange contracts. Cash Flow Hedges. The Company and certain of its 50% or less owned companies have interest rate swap agreements designated as cash flow hedges. By entering into these interest rate swap agreements, the Company and its 50% or less owned companies have converted the variable LIBOR component of certain of their outstanding borrowings to a fixed interest rate. The Company recognized gains on derivative instruments designated as cash flow hedges of $1.8 million and $0.9 million for the six months ended June 30, 2022 and 2021, respectively, as a component of other comprehensive income (loss). As of June 30, 2022, the interest rate swaps held by the Company and certain of the Company’s 50% or less owned companies 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 $6.3 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 $34.7 million and receive a variable interest rate based on LIBOR on the amortized notional value; • 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; and • Mantenimiento Express Maritimo, S.A.P.I. de C.V. (“MexMar”), in which the Company has a 49% noncontrolling interest, has three interest rate swap agreements with maturities in 2023 that call for MexMar to pay fixed rates of interest ranging from 1.71% to 2.10% per annum on the aggregate amortized notional value of $25.6 million and receive a variable interest rate based on LIBOR on the aggregate amortized notional value. Other Derivative Instruments. The Company recognized (losses) gains on derivative instruments not designated as hedging instruments for the six months ended June 30, 2022 and 2021 as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Conversion option liability on Convertible Senior Notes $ 33 $ 30 $ (1 ) $ (5 ) Forward currency exchange, option, and future contracts — — — 390 $ 33 $ 30 $ (1 ) $ 385 The conversion option liability relates to the bifurcated embedded conversion option in the Convertible Senior Notes issued to investment funds managed and controlled by The Carlyle Group (see “Note 8. Fair Value Measurements”).

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	8 . 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 June 30, 2022 and December 31, 2021 that are measured at fair value on a recurring basis were as follows (in thousands): June 30, 2022 Level 1 Level 2 Level 3 LIABILITIES Derivative instruments $ — $ 24 $ — Conversion Option Liability on Convertible Senior Notes — — 1 December 31, 2021 LIABILITIES Derivative instruments $ — $ 1,831 $ — Level 3 . The fair value of the conversion option liability embedded in the Convertible Senior 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 June 30, 2022 and December 31, 2021 were as follows (in thousands): Estimated Fair Value June 30, 2022 Carrying Amount Level 1 Level 2 Level 3 ASSETS Cash, cash equivalents and restricted cash $ 25,904 $ 25,904 $ — $ — LIABILITIES Long-term debt, including current portion 352,096 — 349,590 — 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 six months ended June 30, 2022, the Company recognized impairment charges of $0.9 million related to one FSV classified as held for sale during the first quarter of 2022 and sold during the second quarter of 2022. 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	6 Months Ended
	Jun. 30, 2022
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	9 . COMMITMENTS AND CONTINGENCIES As of June 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$19.6 R$ 12.87 million (USD $ 3.8 million and USD $ 2.5 million, respectively, based on the exchange rate as of June 30 , 202 2 ). 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 and continues to gather information about the incident. It is expected that the NTSB and U.S. Coast Guard investigations will take a significant period of time to complete. 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 the 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. There is significant uncertainty in the amount and timing of costs and potential liabilities relating to the incident involving the SEACOR Power, 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 June 30, 2022, all 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 will 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	6 Months Ended
	Jun. 30, 2022
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock Based Compensation	1 0 . STOCK BASED COMPENSATION Transactions in connection with the Company’s Equity Incentive Plans during the six months ended June 30, 2022 were as follows: Restricted Stock Activity: Outstanding as of December 31, 2021 1,163,090 Granted 999,619 Vested 514,002 Outstanding as of June 30, 2022 (1) 1,648,707 Stock Option Activity: Outstanding as of December 31, 2021 1,061,357 Exercised 34,492 Outstanding as of June 30, 2022 1,026,865 (1) Excludes 253,158 grants For the six months ended June 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	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
Segment Information	1 1 . 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. Certain reclassifications of prior period information have been made to conform the current period’s reportable segment presentation as a result of the Company’s presentation of Discontinued Operations (see “Note 12. Discontinued Operations”). 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 June 30, 2022 Operating Revenues: Time charter $ 9,759 $ 14,930 $ 13,906 $ 10,909 $ 49,504 Bareboat charter — — — 48 48 Other marine services 2,399 1,072 460 534 4,465 12,158 16,002 14,366 11,491 54,017 Direct Costs and Expenses: Operating: Personnel 5,773 3,526 5,691 3,356 18,346 Repairs and maintenance 1,280 2,638 2,545 1,917 8,380 Drydocking 4,090 134 2,250 — 6,474 Insurance and loss reserves 1,198 329 748 270 2,545 Fuel, lubes and supplies 794 1,490 1,318 748 4,350 Other 281 1,871 1,213 685 4,050 13,416 9,988 13,765 6,976 44,145 Direct Vessel (Loss) Profit $ (1,258 ) $ 6,014 $ 601 $ 4,515 9,872 Other Costs and Expenses: Lease expense $ 295 $ 456 $ 38 $ 219 1,008 Administrative and general 10,210 Depreciation and amortization 4,562 3,306 4,229 2,111 14,208 25,426 Gain on Asset Dispositions, Net 25 Operating Loss $ (15,529 ) United States (primarily Gulf of Mexico) Africa and Europe Middle East and Asia Latin America Total For the Six Months Ended June 30, 2022 Operating Revenues: Time charter $ 17,623 $ 27,210 $ 27,566 $ 19,846 $ 92,245 Bareboat charter — — — 666 666 Other marine services 4,451 456 509 1,281 6,697 22,074 27,666 28,075 21,793 99,608 Direct Costs and Expenses: Operating: Personnel 10,696 7,062 11,722 7,301 36,781 Repairs and maintenance 2,381 4,217 4,377 4,196 15,171 Drydocking 6,957 1,278 3,212 — 11,447 Insurance and loss reserves 1,427 453 1,255 596 3,731 Fuel, lubes and supplies 1,456 2,963 2,328 1,332 8,079 Other 505 3,699 2,840 1,388 8,432 23,422 19,672 25,734 14,813 83,641 Direct Vessel (Loss) Profit $ (1,348 ) $ 7,994 $ 2,341 $ 6,980 15,967 Other Costs and Expenses: Lease expense $ 582 $ 858 $ 69 $ 559 2,068 Administrative and general 20,134 Depreciation and amortization 9,200 6,564 8,574 4,241 28,579 50,781 Gain on Asset Dispositions, Net 2,164 Operating Loss $ (32,650 ) As of June 30, 2022 Property and Equipment: Historical Cost $ 269,717 $ 247,967 $ 322,091 $ 160,372 $ 1,000,147 Accumulated Depreciation (130,737 ) (76,742 ) (89,634 ) (27,978 ) (325,091 ) $ 138,980 $ 171,225 $ 232,457 $ 132,394 $ 675,056 Total Assets (1) $ 170,831 $ 194,632 $ 244,606 $ 215,755 $ 825,824 (1) Total assets by region does not include corporate assets of $51.3 million as of June 30, 2022 . United States (primarily Gulf of Mexico) Africa and Europe (2) Middle East and Asia Latin America Total For the Three Months Ended June 30, 2021 Operating Revenues: Time charter $ 3,419 $ 11,437 $ 13,752 $ 12,866 $ 41,474 Bareboat charter 434 — — — 434 Other marine services 727 (224 ) 31 357 891 4,580 11,213 13,783 13,223 42,799 Direct Costs and Expenses: Operating: Personnel 1,528 4,253 5,378 3,194 14,353 Repairs and maintenance 389 2,195 2,806 1,569 6,959 Drydocking 777 374 1,185 456 2,792 Insurance and loss reserves 923 352 461 925 2,661 Fuel, lubes and supplies 245 887 1,081 680 2,893 Other 224 2,072 43 618 2,957 4,086 10,133 10,954 7,442 32,615 Direct Vessel Profit from Continuing Operations $ 494 $ 1,080 $ 2,829 $ 5,781 $ 10,184 Other Costs and Expenses: Lease expense $ 703 $ 270 $ 35 $ 226 $ 1,234 Administrative and general 9,152 Depreciation and amortization 3,287 3,305 4,663 2,838 14,093 24,479 Gain on Asset Dispositions and Impairments 22,653 Operating Income from Continuing Operations $ 8,358 United States (primarily Gulf of Mexico) Africa and Europe, Continuing Operations (2) Middle East and Asia Latin America Total For the Six Months Ended June 30, 2021 Operating Revenues: Time charter $ 4,908 $ 21,939 $ 26,327 $ 22,590 $ 75,764 Bareboat charter 1,163 — — — 1,163 Other 1,273 (493 ) 391 1,213 2,384 7,344 21,446 26,718 23,803 79,311 Direct Costs and Expenses: Operating: Personnel 3,272 7,473 10,586 6,440 27,771 Repairs and maintenance 1,043 3,386 3,709 2,661 10,799 Drydocking 1,652 678 2,251 428 5,009 Insurance and loss reserves 1,450 785 1,163 1,221 4,619 Fuel, lubes and supplies 444 1,459 1,640 1,552 5,095 Other 301 2,651 1,187 1,490 5,629 8,162 16,432 20,536 13,792 58,922 Direct Vessel (Loss) Profit from Continuing Operations $ (818 ) $ 5,014 $ 6,182 $ 10,011 $ 20,389 Other Costs and Expenses: Lease expense $ 1,367 $ 626 $ 57 $ 262 $ 2,312 Administrative and general 17,763 Depreciation and amortization 7,451 6,612 9,373 5,455 28,891 48,966 Gain on Asset Dispositions and Impairments 20,380 Operating Loss from Continuing Operations $ (8,197 ) As of June 30, 2021 Property and Equipment: Historical Cost $ 175,606 $ 240,032 $ 374,979 $ 181,650 $ 972,267 Accumulated Depreciation (105,923 ) (71,560 ) (81,338 ) (30,061 ) (288,882 ) $ 69,683 $ 168,472 $ 293,641 $ 151,589 $ 683,385 Total Assets (1) $ 110,095 $ 185,862 $ 295,430 $ 222,830 $ 814,217 (1) Total assets by region does not include corporate assets of $105.0 (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 June 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 $75.9 million and $77.5 million, respectively. Equity in earnings gains of 50% or less owned companies for the six months ended June 30, 2022 and 2021 were $6.1 million and $6.3 million, respectively.
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 June 30, 2022 Operating Revenues: Time charter $ 9,759 $ 14,930 $ 13,906 $ 10,909 $ 49,504 Bareboat charter — — — 48 48 Other marine services 2,399 1,072 460 534 4,465 12,158 16,002 14,366 11,491 54,017 Direct Costs and Expenses: Operating: Personnel 5,773 3,526 5,691 3,356 18,346 Repairs and maintenance 1,280 2,638 2,545 1,917 8,380 Drydocking 4,090 134 2,250 — 6,474 Insurance and loss reserves 1,198 329 748 270 2,545 Fuel, lubes and supplies 794 1,490 1,318 748 4,350 Other 281 1,871 1,213 685 4,050 13,416 9,988 13,765 6,976 44,145 Direct Vessel (Loss) Profit $ (1,258 ) $ 6,014 $ 601 $ 4,515 9,872 Other Costs and Expenses: Lease expense $ 295 $ 456 $ 38 $ 219 1,008 Administrative and general 10,210 Depreciation and amortization 4,562 3,306 4,229 2,111 14,208 25,426 Gain on Asset Dispositions, Net 25 Operating Loss $ (15,529 ) United States (primarily Gulf of Mexico) Africa and Europe Middle East and Asia Latin America Total For the Six Months Ended June 30, 2022 Operating Revenues: Time charter $ 17,623 $ 27,210 $ 27,566 $ 19,846 $ 92,245 Bareboat charter — — — 666 666 Other marine services 4,451 456 509 1,281 6,697 22,074 27,666 28,075 21,793 99,608 Direct Costs and Expenses: Operating: Personnel 10,696 7,062 11,722 7,301 36,781 Repairs and maintenance 2,381 4,217 4,377 4,196 15,171 Drydocking 6,957 1,278 3,212 — 11,447 Insurance and loss reserves 1,427 453 1,255 596 3,731 Fuel, lubes and supplies 1,456 2,963 2,328 1,332 8,079 Other 505 3,699 2,840 1,388 8,432 23,422 19,672 25,734 14,813 83,641 Direct Vessel (Loss) Profit $ (1,348 ) $ 7,994 $ 2,341 $ 6,980 15,967 Other Costs and Expenses: Lease expense $ 582 $ 858 $ 69 $ 559 2,068 Administrative and general 20,134 Depreciation and amortization 9,200 6,564 8,574 4,241 28,579 50,781 Gain on Asset Dispositions, Net 2,164 Operating Loss $ (32,650 ) As of June 30, 2022 Property and Equipment: Historical Cost $ 269,717 $ 247,967 $ 322,091 $ 160,372 $ 1,000,147 Accumulated Depreciation (130,737 ) (76,742 ) (89,634 ) (27,978 ) (325,091 ) $ 138,980 $ 171,225 $ 232,457 $ 132,394 $ 675,056 Total Assets (1) $ 170,831 $ 194,632 $ 244,606 $ 215,755 $ 825,824 (1) Total assets by region does not include corporate assets of $51.3 million as of June 30, 2022 . United States (primarily Gulf of Mexico) Africa and Europe (2) Middle East and Asia Latin America Total For the Three Months Ended June 30, 2021 Operating Revenues: Time charter $ 3,419 $ 11,437 $ 13,752 $ 12,866 $ 41,474 Bareboat charter 434 — — — 434 Other marine services 727 (224 ) 31 357 891 4,580 11,213 13,783 13,223 42,799 Direct Costs and Expenses: Operating: Personnel 1,528 4,253 5,378 3,194 14,353 Repairs and maintenance 389 2,195 2,806 1,569 6,959 Drydocking 777 374 1,185 456 2,792 Insurance and loss reserves 923 352 461 925 2,661 Fuel, lubes and supplies 245 887 1,081 680 2,893 Other 224 2,072 43 618 2,957 4,086 10,133 10,954 7,442 32,615 Direct Vessel Profit from Continuing Operations $ 494 $ 1,080 $ 2,829 $ 5,781 $ 10,184 Other Costs and Expenses: Lease expense $ 703 $ 270 $ 35 $ 226 $ 1,234 Administrative and general 9,152 Depreciation and amortization 3,287 3,305 4,663 2,838 14,093 24,479 Gain on Asset Dispositions and Impairments 22,653 Operating Income from Continuing Operations $ 8,358 United States (primarily Gulf of Mexico) Africa and Europe, Continuing Operations (2) Middle East and Asia Latin America Total For the Six Months Ended June 30, 2021 Operating Revenues: Time charter $ 4,908 $ 21,939 $ 26,327 $ 22,590 $ 75,764 Bareboat charter 1,163 — — — 1,163 Other 1,273 (493 ) 391 1,213 2,384 7,344 21,446 26,718 23,803 79,311 Direct Costs and Expenses: Operating: Personnel 3,272 7,473 10,586 6,440 27,771 Repairs and maintenance 1,043 3,386 3,709 2,661 10,799 Drydocking 1,652 678 2,251 428 5,009 Insurance and loss reserves 1,450 785 1,163 1,221 4,619 Fuel, lubes and supplies 444 1,459 1,640 1,552 5,095 Other 301 2,651 1,187 1,490 5,629 8,162 16,432 20,536 13,792 58,922 Direct Vessel (Loss) Profit from Continuing Operations $ (818 ) $ 5,014 $ 6,182 $ 10,011 $ 20,389 Other Costs and Expenses: Lease expense $ 1,367 $ 626 $ 57 $ 262 $ 2,312 Administrative and general 17,763 Depreciation and amortization 7,451 6,612 9,373 5,455 28,891 48,966 Gain on Asset Dispositions and Impairments 20,380 Operating Loss from Continuing Operations $ (8,197 ) As of June 30, 2021 Property and Equipment: Historical Cost $ 175,606 $ 240,032 $ 374,979 $ 181,650 $ 972,267 Accumulated Depreciation (105,923 ) (71,560 ) (81,338 ) (30,061 ) (288,882 ) $ 69,683 $ 168,472 $ 293,641 $ 151,589 $ 683,385 Total Assets (1) $ 110,095 $ 185,862 $ 295,430 $ 222,830 $ 814,217 (1) Total assets by region does not include corporate assets of $105.0 (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

Discontinued Operations	6 Months Ended
	Jun. 30, 2022
Discontinued Operations And Disposal Groups [Abstract]
Discontinued Operations	12. 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): Six Months Ended June 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_2

Basis of Presentation and Accounting Policies (Policies)	6 Months Ended
	Jun. 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. Therefore, it will be in effect for a limited time through December 31, 2022. As of June 30, 2022, the reference rates for the Company’s existing debt and interest rate swaps have not changed as a result of any such amendment. The Company will continue to monitor changes to reference rates in applicable agreements and adopt 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 six months ended June 30, 2022 and six months ended June 30, 2021 were as follows (in thousands): 2022 2021 Balance at beginning of period $ 321 $ 3,307 Revenues deferred during the period — 50 Revenues recognized and reclassifications during the period (321 ) (1,374 ) Balance at end of period $ — $ 1,983 As of June 30, 2022, the Company had no deferred revenues. As of June 30, 2022 and December 31, 2021, the Company had unearned revenue $1.4 million and $1.3 million, respectively, primarily related to mobilizations of vessels. The Company recorded $1.1 million of unearned revenue related to new contract agreements and recognized previously recorded unearned revenue of $1.0 million during the six months ended June 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 June 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 six months ended June 30, 2022. During the six months ended June 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 six months ended June 30, 2022, 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. There were no impairments of other owned or leased-in vessels. For the six months ended June 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 June 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 has indicators of impairment and is deemed not recoverable through future operations, the Company determines 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 six months ended June 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 six months ended June 30, 2022, the Company’s effective income tax rate of 9.20% was primarily due to foreign taxes not creditable against U.S. income taxes and foreign losses for which there is no benefit in the U.S.
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss). The components of accumulated other comprehensive loss 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 (4,563 ) 2,468 (2,095 ) Balance as of June 30, 2022 $ 6,220 $ (260 ) $ 5,960
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 Convertible Senior Notes (as defined in “Note 4. Long-Term Debt”) unless anti-dilutive. The Company’s Convertible Senior Notes (“Convertible Senior Notes”) are currently convertible into 2,907,500 shares of Common Stock. For the three and six months ended June 30, 2022, diluted loss per share of Common Stock excluded 2,907,500 issuable upon conversion of the Convertible Senior Notes and exercise of the related Warrants as the effect of their inclusion in the computation would be anti-dilutive. For the three months ended June 30, 2021, diluted earnings per share of Common Stock included 2,907,500 of the Convertible Senior Note Shares as the effect of their inclusion in the computation would be dilutive. For the six months ended June 30, 2021, diluted earnings per share of Common Stock excluded 2,907,500 of the Convertible Senior Note Shares as the effect of their inclusion in the computation would be antidilutive. The number of shares of Common Stock issuable upon conversion of the Convertible Senior Notes and exercise of the related Warrants excluded from the calculation of diluted earnings /loss per share was incorrectly reported in certain prior periods as 2,183,708 . This number of shares was adjusted in the period ended June 30, 2021 following revisions to the calculation. In addition, for the three and six months ended June 30, 2022 diluted loss per share of Common Stock excluded 1,648,707 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 three and six months ended June 30, 2021, diluted earnings per share of Common Stock included 2,294 and 813 shares of restricted stock, respectively, as their inclusion in the computation would be dilutive. For the three and six months ended June 30, 2021 diluted earnings per share of Common Stock excluded 1,134,947 and 1,136,428 shares of restricted stock, respectively, and 1,123,041 share 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)	6 Months Ended
	Jun. 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 six months ended June 30, 2022 and six months ended June 30, 2021 were as follows (in thousands): 2022 2021 Balance at beginning of period $ 321 $ 3,307 Revenues deferred during the period — 50 Revenues recognized and reclassifications during the period (321 ) (1,374 ) Balance at end of period $ — $ 1,983
Schedule of Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss). The components of accumulated other comprehensive loss 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 (4,563 ) 2,468 (2,095 ) Balance as of June 30, 2022 $ 6,220 $ (260 ) $ 5,960

Equipment Acquisitions and Di_2

Equipment Acquisitions and Dispositions (Tables)	6 Months Ended
	Jun. 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)	6 Months Ended
	Jun. 30, 2022
Schedule Of Investments [Abstract]
Equity Method Investments	Investments, at equity, and advances to 50% or less owned companies as of June 30, 2022 and December 31, 2021 were as follows (in thousands): Ownership 2022 2021 MexMar 49.0 % $ 64,399 $ 59,940 SEACOR Marlin 49.0 % 6,078 6,958 Offshore Vessel Holdings 49.0 % 3,186 1,847 Other 20.0% - 50.0% 2,260 2,982 $ 75,923 $ 71,727

Long-term Debt (Tables)

Long-term Debt (Tables)	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
Schedule of Long-term Debt Obligations	The Company’s long-term debt obligations as of June 30, 2022 and December 31, 2021 were as follows (in thousands): June 30, 2022 December 31, 2021 Recourse long-term debt (1) Convertible Senior Notes $ 125,000 $ 125,000 SEACOR Marine Foreign Holdings Credit Facility 79,970 86,470 Sea-Cat Crewzer III Term Loan Facility 17,940 19,178 SEACOR Offshore Delta (f/k/a SEACOSCO) Acquisition Debt 16,205 18,705 SEACOR Delta (f/k/a SEACOSCO) Shipyard Financing 81,982 86,316 SEACOR Alpine Shipyard Financing 28,922 29,734 SEACOR 88/888 Term Loan 5,500 5,500 Tarahumara Shipyard Financing 6,500 6,500 SEACOR Offshore OSV 17,323 18,052 Total recourse long-term debt 379,342 395,455 Non-recourse long-term debt (2) SEACOR 88/888 Term Loan 5,500 5,500 Total non-recourse long-term debt 5,500 5,500 Total principal due for long-term debt 384,842 400,955 Current portion due within one year (33,398 ) (31,602 ) Unamortized debt discount (29,971 ) (33,398 ) Deferred financing costs (2,774 ) (3,193 ) Long-term debt, less current portion $ 318,699 $ 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.

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2022
Leases [Abstract]
Summary of Future Minimum Payments for Leases	As of June 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 $ 1,201 $ 228 2023 1,646 726 2024 464 946 2025 515 959 2026 459 953 Years subsequent to 2026 3,614 4,659 7,899 8,471 Interest component (1,863 ) (1,139 ) 6,036 7,332 Current portion of long-term lease liabilities 2,010 282 Long-term lease liabilities $ 4,026 $ 7,050
Summary of Components of Leases Expense	For the six months ended June 30, 2022 and 2021 the components of lease expense were as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Operating lease cost $ 789 $ 950 $ 1,697 $ 1,855 Finance lease cost: Amortization of finance lease assets (1) 163 1 222 9 Interest on finance lease liabilities (2) 76 1 101 1 Short-term lease costs 219 284 371 457 $ 1,247 $ 1,236 $ 2,391 $ 2,322 (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 six months ended June 30, 2022 supplemental cash flow information related to leases was as follows (in thousands): 2022 Operating cash outflows from operating leases 1,098 Financing cash outflows from finance leases 123 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 six months ended June 30, 2022 other information related to leases was as follows: 2022 Weighted average remaining lease term, in years - operating leases 10.7 Weighted average remaining lease term, in years - finance leases 4.7 Weighted average discount rate - operating leases 5.4 % Weighted average discount rate - finance leases 4.0 %

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Jun. 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 six months ended June 30, 2022: Statutory rate 21.00 % Foreign withholding tax and foreign losses for which there is no benefit in the U.S. (11.53 )% Other (0.27 )% Effective income tax rate 9.20 %

Derivative Instruments and He_2

Derivative Instruments and Hedging Strategies (Tables)	6 Months Ended
	Jun. 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): June 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) $ — $ 24 $ — $ 1,831 — 24 — 1,831 Derivatives not designated as hedging instruments: Conversion option liability on Convertible Senior Notes — 1 — — $ — $ 1 $ — $ —
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 six months ended June 30, 2022 and 2021 as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Conversion option liability on Convertible Senior Notes $ 33 $ 30 $ (1 ) $ (5 ) Forward currency exchange, option, and future contracts — — — 390 $ 33 $ 30 $ (1 ) $ 385

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 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 June 30, 2022 and December 31, 2021 that are measured at fair value on a recurring basis were as follows (in thousands): June 30, 2022 Level 1 Level 2 Level 3 LIABILITIES Derivative instruments $ — $ 24 $ — Conversion Option Liability on Convertible Senior Notes — — 1 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 June 30, 2022 and December 31, 2021 were as follows (in thousands): Estimated Fair Value June 30, 2022 Carrying Amount Level 1 Level 2 Level 3 ASSETS Cash, cash equivalents and restricted cash $ 25,904 $ 25,904 $ — $ — LIABILITIES Long-term debt, including current portion 352,096 — 349,590 — 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)	6 Months Ended
	Jun. 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 six months ended June 30, 2022 were as follows: Restricted Stock Activity: Outstanding as of December 31, 2021 1,163,090 Granted 999,619 Vested 514,002 Outstanding as of June 30, 2022 (1) 1,648,707 Stock Option Activity: Outstanding as of December 31, 2021 1,061,357 Exercised 34,492 Outstanding as of June 30, 2022 1,026,865 (1) Excludes 253,158 grants

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 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 June 30, 2022 Operating Revenues: Time charter $ 9,759 $ 14,930 $ 13,906 $ 10,909 $ 49,504 Bareboat charter — — — 48 48 Other marine services 2,399 1,072 460 534 4,465 12,158 16,002 14,366 11,491 54,017 Direct Costs and Expenses: Operating: Personnel 5,773 3,526 5,691 3,356 18,346 Repairs and maintenance 1,280 2,638 2,545 1,917 8,380 Drydocking 4,090 134 2,250 — 6,474 Insurance and loss reserves 1,198 329 748 270 2,545 Fuel, lubes and supplies 794 1,490 1,318 748 4,350 Other 281 1,871 1,213 685 4,050 13,416 9,988 13,765 6,976 44,145 Direct Vessel (Loss) Profit $ (1,258 ) $ 6,014 $ 601 $ 4,515 9,872 Other Costs and Expenses: Lease expense $ 295 $ 456 $ 38 $ 219 1,008 Administrative and general 10,210 Depreciation and amortization 4,562 3,306 4,229 2,111 14,208 25,426 Gain on Asset Dispositions, Net 25 Operating Loss $ (15,529 ) United States (primarily Gulf of Mexico) Africa and Europe Middle East and Asia Latin America Total For the Six Months Ended June 30, 2022 Operating Revenues: Time charter $ 17,623 $ 27,210 $ 27,566 $ 19,846 $ 92,245 Bareboat charter — — — 666 666 Other marine services 4,451 456 509 1,281 6,697 22,074 27,666 28,075 21,793 99,608 Direct Costs and Expenses: Operating: Personnel 10,696 7,062 11,722 7,301 36,781 Repairs and maintenance 2,381 4,217 4,377 4,196 15,171 Drydocking 6,957 1,278 3,212 — 11,447 Insurance and loss reserves 1,427 453 1,255 596 3,731 Fuel, lubes and supplies 1,456 2,963 2,328 1,332 8,079 Other 505 3,699 2,840 1,388 8,432 23,422 19,672 25,734 14,813 83,641 Direct Vessel (Loss) Profit $ (1,348 ) $ 7,994 $ 2,341 $ 6,980 15,967 Other Costs and Expenses: Lease expense $ 582 $ 858 $ 69 $ 559 2,068 Administrative and general 20,134 Depreciation and amortization 9,200 6,564 8,574 4,241 28,579 50,781 Gain on Asset Dispositions, Net 2,164 Operating Loss $ (32,650 ) As of June 30, 2022 Property and Equipment: Historical Cost $ 269,717 $ 247,967 $ 322,091 $ 160,372 $ 1,000,147 Accumulated Depreciation (130,737 ) (76,742 ) (89,634 ) (27,978 ) (325,091 ) $ 138,980 $ 171,225 $ 232,457 $ 132,394 $ 675,056 Total Assets (1) $ 170,831 $ 194,632 $ 244,606 $ 215,755 $ 825,824 (1) Total assets by region does not include corporate assets of $51.3 million as of June 30, 2022 . United States (primarily Gulf of Mexico) Africa and Europe (2) Middle East and Asia Latin America Total For the Three Months Ended June 30, 2021 Operating Revenues: Time charter $ 3,419 $ 11,437 $ 13,752 $ 12,866 $ 41,474 Bareboat charter 434 — — — 434 Other marine services 727 (224 ) 31 357 891 4,580 11,213 13,783 13,223 42,799 Direct Costs and Expenses: Operating: Personnel 1,528 4,253 5,378 3,194 14,353 Repairs and maintenance 389 2,195 2,806 1,569 6,959 Drydocking 777 374 1,185 456 2,792 Insurance and loss reserves 923 352 461 925 2,661 Fuel, lubes and supplies 245 887 1,081 680 2,893 Other 224 2,072 43 618 2,957 4,086 10,133 10,954 7,442 32,615 Direct Vessel Profit from Continuing Operations $ 494 $ 1,080 $ 2,829 $ 5,781 $ 10,184 Other Costs and Expenses: Lease expense $ 703 $ 270 $ 35 $ 226 $ 1,234 Administrative and general 9,152 Depreciation and amortization 3,287 3,305 4,663 2,838 14,093 24,479 Gain on Asset Dispositions and Impairments 22,653 Operating Income from Continuing Operations $ 8,358 United States (primarily Gulf of Mexico) Africa and Europe, Continuing Operations (2) Middle East and Asia Latin America Total For the Six Months Ended June 30, 2021 Operating Revenues: Time charter $ 4,908 $ 21,939 $ 26,327 $ 22,590 $ 75,764 Bareboat charter 1,163 — — — 1,163 Other 1,273 (493 ) 391 1,213 2,384 7,344 21,446 26,718 23,803 79,311 Direct Costs and Expenses: Operating: Personnel 3,272 7,473 10,586 6,440 27,771 Repairs and maintenance 1,043 3,386 3,709 2,661 10,799 Drydocking 1,652 678 2,251 428 5,009 Insurance and loss reserves 1,450 785 1,163 1,221 4,619 Fuel, lubes and supplies 444 1,459 1,640 1,552 5,095 Other 301 2,651 1,187 1,490 5,629 8,162 16,432 20,536 13,792 58,922 Direct Vessel (Loss) Profit from Continuing Operations $ (818 ) $ 5,014 $ 6,182 $ 10,011 $ 20,389 Other Costs and Expenses: Lease expense $ 1,367 $ 626 $ 57 $ 262 $ 2,312 Administrative and general 17,763 Depreciation and amortization 7,451 6,612 9,373 5,455 28,891 48,966 Gain on Asset Dispositions and Impairments 20,380 Operating Loss from Continuing Operations $ (8,197 ) As of June 30, 2021 Property and Equipment: Historical Cost $ 175,606 $ 240,032 $ 374,979 $ 181,650 $ 972,267 Accumulated Depreciation (105,923 ) (71,560 ) (81,338 ) (30,061 ) (288,882 ) $ 69,683 $ 168,472 $ 293,641 $ 151,589 $ 683,385 Total Assets (1) $ 110,095 $ 185,862 $ 295,430 $ 222,830 $ 814,217 (1) Total assets by region does not include corporate assets of $105.0 (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)	6 Months Ended
	Jun. 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) Six Months Ended June 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		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Basis Of Presentation And Accounting Policies [Line Items]
Deferred revenue	$ 0		$ 0
Unearned revenue related to new contract agreements			1,100,000
Unearned revenue previously recorded recognized			1,000,000		$ 1,000,000
Capitalized interest costs, including allowance for funds used during construction, total			0	$ 300,000
Impairment of long-lived assets owned or leased in vessels			900,000	0
Equity method investment, other than temporary impairment			$ 0	$ 0
Effective income tax rate reconciliation, percent, total			9.20%
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
Prior Periods Adjustment
Basis Of Presentation And Accounting Policies [Line Items]
Incremental common shares attributable to conversion of debt securities, total				2,183,708
Convertible Senior Note
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
Restricted Stock
Basis Of Presentation And Accounting Policies [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	1,648,707	1,134,947	1,648,707	1,136,428
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements		2,294		813
Employee Stock Option
Basis Of Presentation And Accounting Policies [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	1,026,865	1,123,041	1,026,865	1,123,041
Vessels
Basis Of Presentation And Accounting Policies [Line Items]
Unearned revenue			$ 1,400,000		$ 1,300,000
Offshore Support Vessels
Basis Of Presentation And Accounting Policies [Line Items]
Estimated useful life (Year)			20 years
Minimum
Basis Of Presentation And Accounting Policies [Line Items]
Equity method investment, ownership percentage	20%		20%
Minimum | SEACOR Marine Foreign Holdings
Basis Of Presentation And Accounting Policies [Line Items]
Equity method investment, ownership percentage	50%		50%
Maximum
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	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Basis Of Presentation And Accounting Policies [Abstract]
Balance at beginning of period	$ 321	$ 3,307
Revenues deferred during the period		50
Revenues recognized and reclassifications during the period	$ (321)	(1,374)
Balance at end of period		$ 1,983

Basis of Presentation and Acc_6

Basis of Presentation and Accounting Policies - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	$ 446,541
Balance	413,507
Foreign Currency Translation Adjustments Attributable to Parent
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	10,783
Other comprehensive (loss) income	(4,563)
Balance	6,220
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	2,468
Balance	(260)
AOCI Attributable to Parent
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	8,055
Other comprehensive (loss) income	(2,095)
Balance	$ 5,960

Equipment Acquisitions and Di_3

Equipment Acquisitions and Dispositions - Additional Information (Details)		6 Months Ended
	Jan. 12, 2021 USD ($)	Jun. 30, 2022 USD ($) Vessel	Jun. 30, 2021 USD ($) Vessel
Property Plant And Equipment [Line Items]
Number of equipment acquired | Vessel		0
Proceeds from disposition of property and equipment		$ 6,681,000	$ 30,137,000
Property plant equipment consideration transferred			30,100,000
Impairment charges		900,000	0
Falcon Global U S A Term Loan Facility
Property Plant And Equipment [Line Items]
Reduced of debt under credit facility			$ 22,500,000
Maximum
Property Plant And Equipment [Line Items]
Payments to acquire property, plant, and equipment, including fair value hedges		$ 100,000
Platform Supply Vessels
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		$ 6,700,000	$ 25,000,000
Gain (loss) on disposition of property, plant and equipment		$ 2,200,000	$ 20,900,000
Windcat Workboats
Property Plant And Equipment [Line Items]
Proceeds from disposition of property and equipment	$ 38,715,000
Gain (loss) on disposition of property, plant and equipment	$ 22,756,000

Equipment Acquisitions and Di_4

Equipment Acquisitions and Dispositions - Schedule of Gain on Sale of Windcat Workboats (Details) - USD ($) $ in Thousands		6 Months Ended
	Jan. 12, 2021	Jun. 30, 2022	Jun. 30, 2021
Property Plant And Equipment [Line Items]
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	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Schedule Of Investments [Line Items]
Investments at equity	$ 75,923	$ 71,727
Minimum
Schedule Of Investments [Line Items]
Ownership percentage	20%
Maximum
Schedule Of Investments [Line Items]
Ownership percentage	50%		50%
MexMar
Schedule Of Investments [Line Items]
Ownership percentage	49%
Investments at equity	$ 64,399	59,940
SEACOR Marlin LLC
Schedule Of Investments [Line Items]
Ownership percentage	49%
Investments at equity	$ 6,078	6,958
Offshore Vessel Holdings
Schedule Of Investments [Line Items]
Ownership percentage	49%
Investments at equity	$ 3,186	1,847
Other Offshore Marine Services Joint Ventures
Schedule Of Investments [Line Items]
Investments at equity	$ 2,260	$ 2,982	$ 77,500
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%

Long Term Debt - Schedule of Lo

Long Term Debt - Schedule of Long-term Debt Obligations (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 384,842	$ 400,955
Current portion due within one year	(33,398)	(31,602)
Unamortized debt discount	(29,971)	(33,398)
Deferred financing costs	(2,774)	(3,193)
Long-term debt, less current portion	318,699	332,762
Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	379,342	395,455
Non-Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	5,500	5,500
Convertible Senior 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	79,970	86,470
Sea-Cat Crewzer III Term Loan Facility | Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	17,940	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	81,982	86,316
SEACOR Alpine Shipyard Financing | Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	28,922	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	17,323	18,052
Tarahumara Shipyard Financing | Recourse Long-Term Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 6,500	$ 6,500

Long Term Debt - Additional Inf

Long Term Debt - Additional Information (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
	Aug. 02, 2022	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Jun. 30, 2022	Jun. 15, 2022
Debt Instrument [Line Items]
Cash and Cash Equivalents, Percentage					15%
Cash and Cash Equivalents				$ 45.3	$ 45.3
Long-term Debt Obligation
Debt Instrument [Line Items]
Letters of credit outstanding, amount				$ 1.1	$ 1.1
SEACOR Marine Foreign Holdings Credit Facility
Debt Instrument [Line Items]
Line of credit facility, loan amount						$ 130
Cash and Cash Equivalents, Percentage				35%
SEACOR Marine Foreign Holdings Credit Facility | Forecast
Debt Instrument [Line Items]
Percentage of long term margin will revert		3.75%
Cash and Cash Equivalents, Percentage		35%	35%
SEACOR Marine Foreign Holdings Credit Facility | Minimum
Debt Instrument [Line Items]
Cash and Cash Equivalents, Percentage					7.50%
Cash and Cash Equivalents				$ 35	$ 35
SEACOR Marine Foreign Holdings Credit Facility | Minimum | Forecast
Debt Instrument [Line Items]
Percentage of increase in margin		3.75%
SEACOR Marine Foreign Holdings Credit Facility | Maximum | Forecast
Debt Instrument [Line Items]
Percentage of increase in margin		4.75%
SEACOR 88/888 Term Loan | Subsequent Event
Debt Instrument [Line Items]
Long-term debt	$ 5.5
Percentage of debt obligations outstanding	50%
SEACOR 88/888 Term Loan | Minimum | Subsequent Event | SOFR
Debt Instrument [Line Items]
Interest rate margin	3.75%
SEACOR 88/888 Term Loan | Maximum | Subsequent Event | SOFR
Debt Instrument [Line Items]
Interest rate margin	4.75%

Leases - Additional Information

Leases - Additional Information (Details)	6 Months Ended
	Jun. 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 operating leases on equipment	1
Vessels | Minimum
Lessee Lease Description [Line Items]
Operating lease, lease terms (in duration)	9 months
Vessels | Maximum
Lessee Lease Description [Line Items]
Operating lease, lease terms (in duration)	57 months
Other Equipment | Minimum
Lessee Lease Description [Line Items]
Operating lease, lease terms (in duration)	5 months
Other Equipment | Maximum
Lessee Lease Description [Line Items]
Operating lease, lease terms (in duration)	294 months

Leases - Summary of Future Mini

Leases - Summary of Future Minimum Payments For Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Operating Leases
Remainder of 2022	$ 1,201
2023	1,646
2024	464
2025	515
2026	459
Years subsequent to 2026	3,614
Operating lease payments due	7,899
Interest component	(1,863)
Total operating leases	6,036
Current portion of operating lease liabilities	2,010	$ 1,986
Long-term lease liabilities	4,026	4,885
Finance Leases
Remainder of 2022	228
2023	726
2024	946
2025	959
2026	953
Years subsequent to 2026	4,659
Total finance leases	8,471
Interest component	(1,139)
Finance Leases	7,332
Current portion of financing lease liabilities	282	33
Long-term lease liabilities	$ 7,050	$ 76

Leases - Summary of Components

Leases - Summary of Components of Leases Expense (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Leases [Abstract]
Operating lease cost		$ 789	$ 950	$ 1,697	$ 1,855
Finance lease cost:
Amortization of finance lease assets	[1]	163	1	222	9
Interest on lease liabilities	[2]	76	1	101	1
Short-term lease costs		219	284	371	457
Total Lease expense		$ 1,247	$ 1,236	$ 2,391	$ 2,322
[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	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Leases [Abstract]
Operating cash outflows from operating leases	$ 1,098
Financing cash outflows from finance leases	123	$ 12
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)	Jun. 30, 2022
Leases [Abstract]
Weighted average remaining lease term, in years - operating leases	10 years 8 months 12 days
Weighted average remaining lease term, in years - finance leases	4 years 8 months 12 days
Weighted average discount rate - operating leases	5.40%
Weighted average discount rate - finance leases	4%

Income Taxes - Schedule of Effe

Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)	6 Months Ended
	Jun. 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.	(11.53%)
Other	(0.27%)
Effective income tax rate	9.20%

Derivative Instruments and He_3

Derivative Instruments and Hedging Strategies - Schedule of Fair Value of Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Designated as Hedging Instrument | Cash Flow Hedging
Derivative [Line Items]
Derivative Liability	$ 24	$ 1,831
Designated as Hedging Instrument | Interest Rate Swap | Cash Flow Hedging
Derivative [Line Items]
Derivative Liability	24	$ 1,831
Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative Liability	1
Conversion option liability on Convertible Senior Notes	$ 1

Derivative Instruments and He_4

Derivative Instruments and Hedging Strategies - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivative [Line Items]
Derivative gains on cash flow hedges	$ 351	$ (95)	$ 1,156	$ 32
Maximum
Derivative [Line Items]
Equity method investment, ownership percentage	50%	50%	50%	50%
Minimum
Derivative [Line Items]
Equity method investment, ownership percentage	20%		20%
Minimum | SEACOR Marine Foreign Holdings
Derivative [Line Items]
Equity method investment, ownership percentage	50%		50%
Cash Flow Hedging
Derivative [Line Items]
Derivative gains on cash flow hedges			$ 1,800	$ 900
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	$ 6,300		$ 6,300
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	$ 34,700		$ 34,700
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
Cash Flow Hedging | Interest Rate Swap | Designated as Hedging Instrument | MexMar
Derivative [Line Items]
Equity method investment, ownership percentage	49%		49%
Derivative, notional amount	$ 25,600		$ 25,600
Derivative, number of instruments held, total	3		3
Cash Flow Hedging | Maximum | Interest Rate Swap | Designated as Hedging Instrument | MexMar
Derivative [Line Items]
Derivative, fixed interest rate	2.10%		2.10%
Cash Flow Hedging | Minimum | Interest Rate Swap | Designated as Hedging Instrument | MexMar
Derivative [Line Items]
Derivative, fixed interest rate	1.71%		1.71%

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		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivative [Line Items]
Gains (losses) on derivative instruments	$ 33	$ 30	$ (1)	$ 385
Embedded Derivative Financial Instruments
Derivative [Line Items]
Gains (losses) on derivative instruments	$ 33	$ 30	$ (1)	(5)
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, Measurements, Recurring - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Inputs, Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Liability	$ 24	$ 1,831
Fair Value, Inputs, Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Conversion Option Liability on Convertible Senior Notes	$ 1

Fair Value Measurements - Sch_2

Fair Value Measurements - Schedule of Estimated Fair Values of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Reported Value Measurement
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash, cash equivalents and restricted cash	$ 25,904	$ 41,220
Long-term debt, including current portion	352,096	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	25,904	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	$ 349,590	$ 372,992

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($) PropertyandEquipment
Fair Value Disclosures [Abstract]
Impairment charges | $	$ 900,000	$ 0
Number of property and equipment with fair value | PropertyandEquipment		0

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) R$ in Thousands, $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2022 BRL (R$)
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, due within four years	$ 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	$ 3.8	R$ 19600
Maximum | Deficiency Notice
Commitments And Contingencies [Line Items]
Potential range of levies	$ 2.5	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)	6 Months Ended
	Jun. 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
Outstanding as of the end of year (in shares)	1,648,707	[1]
[1] Excludes 253,158 grants

Stock Based Compensation - Sc_2

Stock Based Compensation - Schedule of Equity Incentive Plan Transactions (Details) (Parenthetical)	Jun. 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	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Treasury stock, shares acquired		120,751
Treasury stock, value acquired cost method	$ 10	$ 672	$ 272

Segment Information - Schedule

Segment Information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022		Jun. 30, 2021		Jun. 30, 2022		Jun. 30, 2021		Dec. 31, 2021
Segment Reporting Information [Line Items]
Operating Revenues	$ 54,017		$ 42,799		$ 99,608		$ 79,311
Direct Costs and Expenses	44,145		32,615		83,641		58,922
Direct Vessel (Loss) Profit	9,872		10,184		15,967		20,389
Lease expense	1,008		1,234		2,068		2,312
Administrative and general	10,210		9,152		20,134		17,763
Depreciation and amortization	14,208		14,093		28,579		28,891
Other Costs and Expenses	25,426		24,479		50,781		48,966
Gains on Asset Dispositions and Impairments, Net	25		22,653		2,164		20,380
Operating Loss	(15,529)		8,358		(32,650)		(8,197)
Historical cost	1,000,147		972,267		1,000,147		972,267		$ 1,025,284
Accumulated depreciation	(325,091)		(288,882)		(325,091)		(288,882)		(317,297)
Property and equipment	675,056		683,385		675,056		683,385		$ 707,987
Total Assets	825,824	[1]	814,217	[2]	825,824	[1]	814,217	[2]
Time Charter
Segment Reporting Information [Line Items]
Operating Revenues	49,504		41,474		92,245		75,764
Bareboat Charter
Segment Reporting Information [Line Items]
Operating Revenues	48		434		666		1,163
Other Marine Services
Segment Reporting Information [Line Items]
Operating Revenues	4,465		891		6,697		2,384
Personnel
Segment Reporting Information [Line Items]
Direct Costs and Expenses	18,346		14,353		36,781		27,771
Repairs and Maintenance
Segment Reporting Information [Line Items]
Direct Costs and Expenses	8,380		6,959		15,171		10,799
Drydocking
Segment Reporting Information [Line Items]
Direct Costs and Expenses	6,474		2,792		11,447		5,009
Insurance and Loss Reserves
Segment Reporting Information [Line Items]
Direct Costs and Expenses	2,545		2,661		3,731		4,619
Fuel, Lubes and Supplies
Segment Reporting Information [Line Items]
Direct Costs and Expenses	4,350		2,893		8,079		5,095
Other Direct Costs and Expenses
Segment Reporting Information [Line Items]
Direct Costs and Expenses	4,050		2,957		8,432		5,629
UNITED STATES
Segment Reporting Information [Line Items]
Operating Revenues	12,158		4,580		22,074		7,344
Direct Costs and Expenses	13,416		4,086		23,422		8,162
Direct Vessel (Loss) Profit	(1,258)		494		(1,348)		(818)
Lease expense	295		703		582		1,367
Depreciation and amortization	4,562		3,287		9,200		7,451
Historical cost	269,717		175,606		269,717		175,606
Accumulated depreciation	(130,737)		(105,923)		(130,737)		(105,923)
Property and equipment	138,980		69,683		138,980		69,683
Total Assets	170,831	[1]	110,095	[2]	170,831	[1]	110,095	[2]
UNITED STATES | Time Charter
Segment Reporting Information [Line Items]
Operating Revenues	9,759		3,419		17,623		4,908
UNITED STATES | Bareboat Charter
Segment Reporting Information [Line Items]
Operating Revenues			434				1,163
UNITED STATES | Other Marine Services
Segment Reporting Information [Line Items]
Operating Revenues	2,399		727		4,451		1,273
UNITED STATES | Personnel
Segment Reporting Information [Line Items]
Direct Costs and Expenses	5,773		1,528		10,696		3,272
UNITED STATES | Repairs and Maintenance
Segment Reporting Information [Line Items]
Direct Costs and Expenses	1,280		389		2,381		1,043
UNITED STATES | Drydocking
Segment Reporting Information [Line Items]
Direct Costs and Expenses	4,090		777		6,957		1,652
UNITED STATES | Insurance and Loss Reserves
Segment Reporting Information [Line Items]
Direct Costs and Expenses	1,198		923		1,427		1,450
UNITED STATES | Fuel, Lubes and Supplies
Segment Reporting Information [Line Items]
Direct Costs and Expenses	794		245		1,456		444
UNITED STATES | Other Direct Costs and Expenses
Segment Reporting Information [Line Items]
Direct Costs and Expenses	281		224		505		301
Africa and Europe, Continuing Operations
Segment Reporting Information [Line Items]
Operating Revenues	16,002		11,213	[3]	27,666		21,446	[3]
Direct Costs and Expenses	9,988		10,133	[3]	19,672		16,432	[3]
Direct Vessel (Loss) Profit	6,014		1,080	[3]	7,994		5,014	[3]
Lease expense	456		270	[3]	858		626	[3]
Depreciation and amortization	3,306		3,305	[3]	6,564		6,612	[3]
Historical cost	247,967		240,032	[3]	247,967		240,032	[3]
Accumulated depreciation	(76,742)		(71,560)	[3]	(76,742)		(71,560)	[3]
Property and equipment	171,225		168,472	[3]	171,225		168,472	[3]
Total Assets	194,632	[1]	185,862	[2],[3]	194,632	[1]	185,862	[2],[3]
Africa and Europe, Continuing Operations | Time Charter
Segment Reporting Information [Line Items]
Operating Revenues	14,930		11,437	[3]	27,210		21,939	[3]
Africa and Europe, Continuing Operations | Other Marine Services
Segment Reporting Information [Line Items]
Operating Revenues	1,072		(224)	[3]	456		(493)	[3]
Africa and Europe, Continuing Operations | Personnel
Segment Reporting Information [Line Items]
Direct Costs and Expenses	3,526		4,253	[3]	7,062		7,473	[3]
Africa and Europe, Continuing Operations | Repairs and Maintenance
Segment Reporting Information [Line Items]
Direct Costs and Expenses	2,638		2,195	[3]	4,217		3,386	[3]
Africa and Europe, Continuing Operations | Drydocking
Segment Reporting Information [Line Items]
Direct Costs and Expenses	134		374	[3]	1,278		678	[3]
Africa and Europe, Continuing Operations | Insurance and Loss Reserves
Segment Reporting Information [Line Items]
Direct Costs and Expenses	329		352	[3]	453		785	[3]
Africa and Europe, Continuing Operations | Fuel, Lubes and Supplies
Segment Reporting Information [Line Items]
Direct Costs and Expenses	1,490		887	[3]	2,963		1,459	[3]
Africa and Europe, Continuing Operations | Other Direct Costs and Expenses
Segment Reporting Information [Line Items]
Direct Costs and Expenses	1,871		2,072	[3]	3,699		2,651	[3]
Middle East and Asia
Segment Reporting Information [Line Items]
Operating Revenues	14,366		13,783		28,075		26,718
Direct Costs and Expenses	13,765		10,954		25,734		20,536
Direct Vessel (Loss) Profit	601		2,829		2,341		6,182
Lease expense	38		35		69		57
Depreciation and amortization	4,229		4,663		8,574		9,373
Historical cost	322,091		374,979		322,091		374,979
Accumulated depreciation	(89,634)		(81,338)		(89,634)		(81,338)
Property and equipment	232,457		293,641		232,457		293,641
Total Assets	244,606	[1]	295,430	[2]	244,606	[1]	295,430	[2]
Middle East and Asia | Time Charter
Segment Reporting Information [Line Items]
Operating Revenues	13,906		13,752		27,566		26,327
Middle East and Asia | Other Marine Services
Segment Reporting Information [Line Items]
Operating Revenues	460		31		509		391
Middle East and Asia | Personnel
Segment Reporting Information [Line Items]
Direct Costs and Expenses	5,691		5,378		11,722		10,586
Middle East and Asia | Repairs and Maintenance
Segment Reporting Information [Line Items]
Direct Costs and Expenses	2,545		2,806		4,377		3,709
Middle East and Asia | Drydocking
Segment Reporting Information [Line Items]
Direct Costs and Expenses	2,250		1,185		3,212		2,251
Middle East and Asia | Insurance and Loss Reserves
Segment Reporting Information [Line Items]
Direct Costs and Expenses	748		461		1,255		1,163
Middle East and Asia | Fuel, Lubes and Supplies
Segment Reporting Information [Line Items]
Direct Costs and Expenses	1,318		1,081		2,328		1,640
Middle East and Asia | Other Direct Costs and Expenses
Segment Reporting Information [Line Items]
Direct Costs and Expenses	1,213		43		2,840		1,187
Latin America
Segment Reporting Information [Line Items]
Operating Revenues	11,491		13,223		21,793		23,803
Direct Costs and Expenses	6,976		7,442		14,813		13,792
Direct Vessel (Loss) Profit	4,515		5,781		6,980		10,011
Lease expense	219		226		559		262
Depreciation and amortization	2,111		2,838		4,241		5,455
Historical cost	160,372		181,650		160,372		181,650
Accumulated depreciation	(27,978)		(30,061)		(27,978)		(30,061)
Property and equipment	132,394		151,589		132,394		151,589
Total Assets	215,755	[1]	222,830	[2]	215,755	[1]	222,830	[2]
Latin America | Time Charter
Segment Reporting Information [Line Items]
Operating Revenues	10,909		12,866		19,846		22,590
Latin America | Bareboat Charter
Segment Reporting Information [Line Items]
Operating Revenues	48				666
Latin America | Other Marine Services
Segment Reporting Information [Line Items]
Operating Revenues	534		357		1,281		1,213
Latin America | Personnel
Segment Reporting Information [Line Items]
Direct Costs and Expenses	3,356		3,194		7,301		6,440
Latin America | Repairs and Maintenance
Segment Reporting Information [Line Items]
Direct Costs and Expenses	1,917		1,569		4,196		2,661
Latin America | Drydocking
Segment Reporting Information [Line Items]
Direct Costs and Expenses			456				428
Latin America | Insurance and Loss Reserves
Segment Reporting Information [Line Items]
Direct Costs and Expenses	270		925		596		1,221
Latin America | Fuel, Lubes and Supplies
Segment Reporting Information [Line Items]
Direct Costs and Expenses	748		680		1,332		1,552
Latin America | Other Direct Costs and Expenses
Segment Reporting Information [Line Items]
Direct Costs and Expenses	$ 685		$ 618		$ 1,388		$ 1,490
[1]Total assets by region does not include corporate assets of $51.3 million as of June 30, 2022[2]Total assets by region does not include corporate assets of $105.0

Segment Information - Schedul_2

Segment Information - Schedule of Segment Reporting Information, by Segment (Parenthetical) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Segment Reporting Information [Line Items]
Assets, Total	$ 877,114	$ 912,502
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Assets, Total	$ 51,300		$ 105,000

Segment Information - Additiona

Segment Information - Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Segment Information [Line Items]
Equity method investments	$ 75,923		$ 71,727
Equity in Gains (Losses) Earnings of 50% or Less Owned Companies	$ 6,100	$ 6,300
Maximum
Segment Information [Line Items]
Equity method investment, ownership percentage	50%	50%
Minimum
Segment Information [Line Items]
Equity method investment, ownership percentage	20%
Other Offshore Marine Services Joint Ventures
Segment Information [Line Items]
Equity method investments	$ 2,260	$ 77,500	$ 2,982
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		6 Months Ended
	Jan. 12, 2021	Jun. 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		6 Months Ended
	Jan. 12, 2021	Jun. 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