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PREPAID EXPENSES AND OTHER CURRENT AND NONCURRENT ASSETS (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
PREPAID EXPENSES AND OTHER CURRENT AND NONCURRENT ASSETS    
Lubricant inventory, fuel oil and diesel oil inventory and other stores $ 12,635 $ 11,342
Prepaid items 5,439 5,000
Insurance receivable 2,171 1,096
Other 3,067 1,627
Total prepaid expenses and other current assets 23,312 19,065
Security deposit related to operating lease included in other noncurrent assets $ 514 $ 514