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OTHER CURRENT LIABILITIES (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
OTHER CURRENT LIABILITIES [Abstract]    
Deferred drydocking, operating cost and charterhire revenue $ 8,040 $ 15,464
Mark-to-market swaps valuation:    
Current portion of the deferred tax benefit arising on intra-group transfer of long-term assets 3,156 7,256
Deferred credits from capital lease transactions 0 627
Other 244 928
Other current liabilities 38,006 110,981
Swap | Interest rate swap
    
Mark-to-market swaps valuation:    
Derivative liabilities, current 26,472 59,084
Swap | Currency swap
    
Mark-to-market swaps valuation:    
Derivative liabilities, current $ 94 $ 27,622