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REVENUE RECOGNITION - Schedule of Customer Assets & Liabilities (Details) $ in Thousands | 3 Months Ended
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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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