BUSINESS DESCRIPTION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2021	May 28, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill impairment charge	$ 1,228	$ 1,228
Goodwill		529,463	$ 523,998	$ 523,949
Designated as Hedging Instrument | Interest rate swap
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Notional amount of derivatives					$ 108,569
Designated as Hedging Instrument | Currency swap
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Notional amount of derivatives					$ 108,569
HNH
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill		$ 424,051		$ 424,044
Impairment charges			$ 1,026