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PREPAID EXPENSES AND OTHER CURRENT AND NONCURRENT ASSETS (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
PREPAID EXPENSES AND OTHER CURRENT AND NONCURRENT ASSETS [Abstract]    
Lubricant inventory, fuel oil and diesel oil inventory and other stores $ 10,989 $ 10,322
Prepaid items 3,953 5,067
Insurance receivable 1,352 1,817
Other 2,096 940
Total prepaid expenses and other current assets 18,390 18,146
Security deposit related to operating lease included in other noncurrent assets $ 514 $ 514