Long-Term Debt and Capital Lease Obligations (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Mar. 31, 2012
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount					$ 47,600,000
Repayments of Long-term Capital Lease Obligations			7,200,000
Repayments of Debt	3,200,000
Proceeds from Other Debt			100,000
Net borrowings (repayments) on inventory financing arrangements			(14,798,000)	5,793,000
Debt extinguishment losses, net	0	0	(160,000)	(48,000)
SEACOR Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding					125,000,000
Line of Credit Facility, Remaining Borrowing Capacity					279,000,000
Letters of Credit Outstanding, Amount					1,000,000
Repayments of Lines of Credit			50,000,000
ERA Group Inc. Senior Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding					260,000,000
Line of Credit Facility, Remaining Borrowing Capacity					89,700,000
Letters of Credit Outstanding, Amount					300,000
Proceeds from Lines of Credit			8,000,000
5.875% Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					5.875%
Extinguishment of Debt, Amount			5,500,000
Aggregate Purchase Price Of Senior Notes			5,700,000
Debt extinguishment losses, net			$ 200,000
7.375% Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					7.375%