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REVENUE RECOGNITION - Schedule of Customer Assets & Liabilities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)
Accounts receivable
Beginning balance	$ 208,972
Increase (decrease), net	(67,879)
Ending balance	141,093
Unbilled accounts receivable
Beginning balance	73,945
Increase (decrease), net	5,926
Ending balance	79,871
Deferred revenue (current)
Beginning balance	109,119
Increase (decrease), net	(35)
Ending balance	109,084
Deferred revenue (long-term)
Beginning balance	20,619
Increase (decrease), net	(1,307)
Ending balance	$ 19,312

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