Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net Income (Loss)	$ 33,137	$ (82,982)	$ (98,695)
Other Comprehensive Income:
Foreign currency translation gains, net	3,986	2,112	20,157
Derivative gains (losses) on cash flow hedges	219	(2,139)	(1,901)
Other comprehensive income	5,265	1,242	18,163
Income tax benefit			173
Other comprehensive income, net	5,265	1,242	18,336
Comprehensive Income (Loss)	38,402	(81,740)	(80,359)
Comprehensive Income (Loss) attributable to Noncontrolling Interests in Subsidiaries	1	(4,067)	(5,858)
Comprehensive Income (Loss) attributable to SEACOR Marine Holdings Inc.	38,401	(77,673)	(74,501)
Interest Expense
Other Comprehensive Income:
Reclassification of derivative losses on cash flow hedges	1,648	1,425	552
Equity Method Investments
Other Comprehensive Income:
Reclassification of derivative losses on cash flow hedges	$ (588)	$ (156)	$ (645)