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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Client Receivables, Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Revenue from Contract with Customer [Abstract] |  |
Client receivables | $ 591,979 | $ 559,410
Unbilled revenue | 228,518 | 204,258
Total | 820,497 | 763,668
Less: Allowance for credit losses | (21,187) | (11,278)
Trade receivables and contract assets, net | 799,310 | 752,390
Current deferred revenue | 250,485 | 264,259
Long-term deferred revenue (included in Other long-term liabilities) | 29,391 | 25,795
Customer contract deposits (included in Other current liabilities) | $ 69,847 | $ 91,640

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