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FAIR VALUE MEASUREMENTS - Nonrecurring Basis (Details) - USD ($)
$ in Thousands
 7 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-lived assets   $ 91,841 $ 81,350 $ 46,200
Loss on impairment $ 71,285 174,529 71,401 $ 116,822
Quoted Prices in Active Markets for Identical Assets (Level 1)        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-lived assets   0 0  
Significant Other Observable Inputs (Level 2)        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-lived assets   0 0  
Significant Unobservable Inputs (Level 3)        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-lived assets   $ 91,841 $ 81,350