Gain On Sale Of Assets (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2015 USD ($) T	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($) T
Property, Plant and Equipment [Line Items]
Gain (loss) on sale of other assets		$ 4,543	$ (2)
Loss on Extinguishment of Debt		$ 585	225
Handysize Vessel [Member]
Property, Plant and Equipment [Line Items]
Related debt paid off	$ 13,500
Loss on Extinguishment of Debt	(95)
PCTC [Member] | Revolving Credit Facility [Member]
Property, Plant and Equipment [Line Items]
Related debt paid off	$ 10,000
PCTC [Member] | Pure Car Truck Carriers [Member]
Property, Plant and Equipment [Line Items]
Weight of vessel sold | T	14,930
Gain (loss) on sale of other assets	$ 4,600
Dry Bulk Carriers [Member] | Handysize Vessel [Member]
Property, Plant and Equipment [Line Items]
Proceeds from sale of other assets			$ 16,400
Weight of vessel sold | T			36,000
Gain (loss) on sale of other assets			$ (68)
Related debt paid off			13,500
Loss on Extinguishment of Debt			$ 95