FAIR VALUE OF FINANCIAL INSTRUMENTS - Carrying Value (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Term Loan B
Fair Value Of Instruments [Line Items]
Total debt before deferred financing costs	$ 770,000	$ 1,291,700
Fair value of debt	774,813	1,243,261
Revolver
Fair Value Of Instruments [Line Items]
Total debt before deferred financing costs	117,000	180,000
Fair value of debt	117,000	180,000
Senior Notes
Fair Value Of Instruments [Line Items]
Total debt before deferred financing costs	400,000	400,000
Fair value of debt	423,250	378,000
Notes
Fair Value Of Instruments [Line Items]
Total debt before deferred financing costs	425,000	0
Fair value of debt	454,750	0
Other Debt
Fair Value Of Instruments [Line Items]
Total debt before deferred financing costs	873	912
Letter of Credit
Fair Value Of Instruments [Line Items]
Total debt before deferred financing costs	$ 5,862	$ 5,862