REVENUE - Contract Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Contract with Customer, Asset and Liability [Abstract]
Receivables, included in “Accounts receivable net of allowance for doubtful accounts”	$ 273,217	$ 272,321
Unearned revenue - current	10,638	15,651
Unearned revenue - noncurrent	474	$ 1,294
Change in Contract with Customer, Liability [Abstract]
Beginning balance	16,945
Revenue recognized during the period that was included in the beginning balance of contract liabilities	(16,945)
Additions, net of revenue recognized during period	11,112
Ending balance	$ 11,112