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ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
ACCOUNTS PAYABLE AND ACCRUED EXPENSES    
Accounts payable $ 4,477 $ 5,047
Accrued general and administrative expenses 8,803 14,275
Accrued vessel operating expenses 10,387 11,390
Total $ 23,667 $ 30,712