Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2012
Income Taxes [Abstract]
Provision (benefit) for income taxes	$ (7)	$ 653	$ 32	$ (229)
(Loss) income before taxes and equity in net loss unconsolidated entities	$ (839)	$ 69	(6,194)	$ (3,922)
Deferred gain from disposition of qualifying vessels			80,900		$ 79,400
Increase in valuation allowance			$ 1,800