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LONG-TERM DEBT - Senior Secured Junior Lien Notes (Details) - 6.875% senior secured junior lien notes due in 2031 - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Dec. 30, 2018
Debt Instrument [Line Items]    
Interest rate (as a percent) 6.875% 6.875%
Percentage of premium and accrued and unpaid interest 100.00%  
Junior Lien Term Loan Credit Agreement | Tranche B    
Debt Instrument [Line Items]    
Debt conversion amount $ 75.0