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FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Fair Value of Significant Unobservable Inputs (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]    
Balance as of January 1 $ 22,610 $ 21,460
Revaluations 853 406
Acquisition of deferred consideration 0 480
Balance as of June 30 $ 23,463 $ 22,346