Unconsolidated Entities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Loss of Unconsolidated Entities	$ (270)	$ (70)
Oslo Bulk AS [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Loss of Unconsolidated Entities	41	281
Oslo Bulk Holding PTE Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Loss of Unconsolidated Entities	(372)	(239)
Other [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity in Net Loss of Unconsolidated Entities	$ 61	$ (112)