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DEBT (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2017
May 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]      
Long-term Debt $ 1,652,022   $ 1,601,836
Notes Payable, Current $ 6,831   $ 0
2025 Senior Notes [Member]      
Debt Instrument [Line Items]      
Long-term Debt   $ 725,000  
Debt instrument, interest rate 7.25%    
Proceeds from Debt, Net of Issuance Costs $ 711,576    
Debt Instrument, Redemption Price, Percentage 100.00%    
2020 Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate 8.25%    
2023 Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate 7.00%    
Notes Payable, Other Payables [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Periodic Payment Terms, Monthly Payments to be Paid $ 403    
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid $ 3,200