Unconsolidated Entities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Schedule of Equity Method Investments [Line Items]
Net (Loss) Income of Unconsolidated Entities	$ (360)	$ 84	$ (705)	$ 665
Oslo Bulk AS [Member]
Schedule of Equity Method Investments [Line Items]
Net (Loss) Income of Unconsolidated Entities	(193)	224	(290)	1,123
Oslo Bulk Holding Pte, Ltd (formerly Tony Bulkers) [Member]
Schedule of Equity Method Investments [Line Items]
Net (Loss) Income of Unconsolidated Entities	(122)	26	(363)	(213)
Terminales Transgolfo, S.A. DE C.V. [Member]
Schedule of Equity Method Investments [Line Items]
Net (Loss) Income of Unconsolidated Entities	$ (45)	$ (166)	$ (52)	$ (245)