Unconsolidated Entities (Summarized Equity In Net Income (Loss) Of Unconsolidated Entities) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Income (Loss) of Unconsolidated Entities	$ 10	$ (1,661)	$ (215)
Oslo Bulk, AS [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Income (Loss) of Unconsolidated Entities		(812)	1,010
Oslo Bulk Holding Pte, Ltd (formerly Tony Bulkers) [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Income (Loss) of Unconsolidated Entities	(469)	(774)	(935)
Terminales Transgolfo, S.A. DE C.V. [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Income (Loss) of Unconsolidated Entities	(193)	(75)	(290)
Saltholmen Shipping Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Income (Loss) of Unconsolidated Entities	567
Brattholmen Shipping Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Income (Loss) of Unconsolidated Entities	$ 105