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Accrued Expenses (Schedule of Accrued Expenses) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Accrued Expenses [Abstract]    
Accrued voyage expenses $ 2,410 $ 1,279
Accrued loan interest 780 1,397
Accrued legal and professional fees 409 310
Total $ 3,599 $ 2,986