Quarterly Financial Information (Tables)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Data [Abstract]

Quarterly Financial Information

	Three Months Ended
	Dec. 31,		Sept. 30,		June 30,		March 31,
2020
Operating Revenues	$	213,531	$	175,414	$	172,585	$	192,296
Operating Income (Loss)	13,317		5,620		13,816		(98)
Net Income	10,798		3,189		7,875		1,469
Net Income attributable to SEACOR Holdings Inc.	10,770		3,190		7,884		1,467
Basic Earnings Per Common Share of SEACOR Holdings Inc.	$	0.54	$	0.16	$	0.39	$	0.07
Diluted Earnings Per Common Share of SEACOR Holdings Inc.	$	0.52	$	0.16	$	0.39	$	0.07
2019
Operating Revenues	$	192,761	$	200,658	$	197,023	$	209,524
Operating Income	2,562		12,519		11,106		18,968
Net Income (Loss)	(1,912)		5,861		17,001		13,068
Net Income (Loss) attributable to SEACOR Holdings Inc.	(1,917)		6,405		14,553		7,733
Basic Earnings (Loss) Per Common Share of SEACOR Holdings Inc.	$	(0.10)	$	0.33	$	0.80	$	0.42
Diluted Earnings (Loss) Per Common Share of SEACOR Holdings Inc.	$	(0.10)	$	0.32	$	0.76	$	0.41