GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION - Narrative (Details) - USD ($)	Sep. 30, 2018	Nov. 30, 2017
Loans Payable | Term Loan B
Condensed Financial Statements, Captions [Line Items]
Debt instrument face value	$ 400,000,000
Loans Payable | Term Loan A
Condensed Financial Statements, Captions [Line Items]
Debt instrument face value	100,000,000
Senior Notes | Senior Secured Second Lien Notes due 2025
Condensed Financial Statements, Captions [Line Items]
Debt instrument face value	$ 300,000,000	$ 300,000,000
Stated interest rate (as a percent)	11.00%	11.00%