Related-Party Transactions (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Related Party Transactions (Textual) [Abstract]
Number of performance bonds outstanding	1
Amount of performance bonds outstanding	$ 11,800,000
Terms and conditions of service agreement with Loews	Services Agreement may be terminated at our option upon 30 days' notice to Loews and at the option of Loews upon six months' notice to us
Services Agreement with Loews [Member]
Related Party Transaction [Line Items]
Related party transaction expenses	1,100,000	1,300,000	1,100,000
Performance and Appeal Bonds of Loews [Member]
Related Party Transaction [Line Items]
Related party transaction expenses	80,000	58,000	213,000
SEACOR Holdings Inc [Member]
Related Party Transaction [Line Items]
Related party transaction expenses	100,000	3,100,000	3,600,000
Ernst & Young LLP [Member]
Related Party Transaction [Line Items]
Related party transaction expenses	$ 1,200,000	$ 1,000,000	$ 2,100,000