Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Comprehensive Income (Loss), Net of Tax:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 37,824	$ 60,459	$ 42,150
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	859	4,477	(1,089)
Foreign currency translation adjustments	(222)	833	342
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	622	2,724	3,632
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	17	21	116
Other Comprehensive Income (Loss), before Tax	1,385	9,617	(1,531)
Income tax (expense) benefit, Accumulated Other Comprehensive Loss	457	3,216	(494)
Other Comprehensive Income (Loss), Net of Tax	928	6,401	(1,037)
Comprehensive Income	38,752	66,860	41,113
Comprehensive Income attributable to Noncontrolling Interests in Subsidiaries	933	(327)	976
Comprehensive Income attributable to SEACOR Holdings Inc.	37,819	67,187	40,137
Interest Expense [Member]
Other Comprehensive Income (Loss), Net of Tax:
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	0	2,000	2,867
Equity Method Investments [Member]
Other Comprehensive Income (Loss), Net of Tax:
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	622	724	765
Derivative Gains (Losses) [Member]
Other Comprehensive Income (Loss), Net of Tax:
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	0	3,272	0
Interest Rate Swap [Member]
Other Comprehensive Income (Loss), Net of Tax:
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	$ 109	$ (1,710)	$ (4,532)