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LONG-TERM DEBT - Certain Covenants and Events of Default (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2017
USD ($)
Debt Disclosure [Abstract]  
Maximum borrowing capacity prior to application of fixed charge coverage ratio $ 50.0
Percentage of outstanding debt prior to application of fixed charge coverage ratio, percent 9.00%
Number of consecutive business days before Liquidity Event 5 days
Fixed charge coverage ratio required for four consecutive quarters, minimum 1.00
Number of consecutive calendar days before end of Liquidity Event 30 days