DERIVATIVE INSTRUMENTS - Balance Sheet Location of Derivatives (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Fair value - Derivatives in liability position
Total derivatives	$ 11,342	$ 7,285
Designated as Hedging Instrument | Accrued expenses and other current liabilities | Interest Rate Swap
Fair value - Derivatives in liability position
Interest rate swaps	11,172	1,275
Designated as Hedging Instrument | Other noncurrent liabilities | Interest Rate Swap
Fair value - Derivatives in liability position
Interest rate swaps	0	5,920
Not Designated as Hedging Instrument | Accrued expenses and other current liabilities | Interest Rate Swap
Fair value - Derivatives in liability position
Interest rate swaps	170	0
Not Designated as Hedging Instrument | Other noncurrent liabilities | Interest Rate Swap
Fair value - Derivatives in liability position
Interest rate swaps	$ 0	$ 90