NOTES PAYABLE, REVOLVING CREDIT FACILITY AND CAPITAL LEASES - Term Loans (Details) - Term Loan - USD ($)	Dec. 31, 2018	Jul. 01, 2016
Debt Instrument [Line Items]
Face Value	$ 646,441,000
Discount	(15,112,000)
Total Carrying Value	631,329,000
First Lien Term Loans
Debt Instrument [Line Items]
Face Value	587,191,000	$ 485,000,000
Discount	(15,112,000)
Total Carrying Value	572,079,000
Restated Agreement
Debt Instrument [Line Items]
Face Value	59,250,000
Discount	0
Total Carrying Value	$ 59,250,000