Unconsolidated Entities (Summarized Equity In Net Income (Loss) Of Unconsolidated Entities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Income (Loss) of Unconsolidated Entities	$ (4,049)	$ 10
Oslo Bulk AS [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Income (Loss) of Unconsolidated Entities	(3,187)
Oslo Bulk Holding Pte. Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Income (Loss) of Unconsolidated Entities	(1,583)	(469)
Terminales Transgolfo [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Income (Loss) of Unconsolidated Entities	(393)	(193)
Saltholmen Shipping Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Income (Loss) of Unconsolidated Entities	856	567
Brattholmen Shipping Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Income (Loss) of Unconsolidated Entities	$ 258	$ 105