Leases (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended						3 Months Ended	6 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Charters In [Member]	Sep. 30, 2013 Charters In [Member]	Sep. 30, 2014 Charters In [Member]	Sep. 30, 2013 Charters In [Member]	Sep. 30, 2014 Bareboat Charters In [Member]	Sep. 30, 2014 Time Charters In [Member]	Sep. 30, 2014 Charter Out [Member]	Sep. 30, 2014 Charter Out [Member] Contract of Affreightmen [Member]	Sep. 30, 2014 Office Space [Member]	Jun. 30, 2013 Office Space [Member]	Sep. 30, 2014 Office Space [Member]
Leases [Line Items]
Commitments to charter in vessels, Number of Units					19		19		13	6
Operating Leases, Future Minimum Payments Receivable, Current											$ 89,411	$ 7,187
Operating Leases, Future Minimum Payments Receivable, in Two Years											281,650	26,559
Operating Leases, Future Minimum Payments Receivable, in Three Years											186,819	22,023
Operating Leases, Future Minimum Payments Receivable, in Four Years											118,246	22,347
Operating Leases, Future Minimum Payments Receivable, in Five Years											83,112	22,698
Operating Leases, Future Minimum Payments Receivable, Thereafter											219,214	29,387
Reorganization Items, Total	49,756	14,705	165,135	236,829	367	(828)	6,419	187,368					486		646
Provision for Lease Losses														3,646
Leasehold Improvements, Gross													1,638		1,638
Interest Expense On Postpetition rejected executory contracts	428		7,453
Operating Leases, Rent Expense	$ 34,650	$ 46,682	$ 120,115	$ 162,106											$ 4,132