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DEBT - ASU 2015-03 (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Line of Credit Facility    
Long-term debt, current $ (4,576) $ (579,023)
Long-term debt, noncurrent (508,444)  
Deferred financing costs, net (11,357) (9,411)
Adoption Of ASU 2015-03    
Line of Credit Facility    
Long-term debt, current   9,411
Long-term debt, noncurrent 11,357  
Deferred financing costs, net $ 11,357 $ 9,411