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INTEREST EXPENSE (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
INTEREST EXPENSE [Abstract]      
Interest Expenses, net of capitalized interest $ 18,286 $ 8,811 $ 7,590
Commitment Fee 760 937 2,025
Amortization of Deferred Financing Costs 1,393 1,382 1,240
Other financial costs 25 40 0
Total Interest Expenses 20,464 11,170 10,855
Interest expenses, capitalized interest $ 2,500 $ 1,600 $ 1,000