FAIR VALUE MEASUREMENTS - Schedule of Liabilities Measured At Fair Value Using Significant Unobservable Inputs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 39,064	$ 50,805	$ 67,113	$ 118,567
Contingent consideration recognized due to acquisitions	0	(4,100)	0	(4,100)
Contingent consideration write off	0	(197)	0	(197)
Change in fair value of due to sellers	900	0	4,361	0
Due to seller reclassification	(30,000)	0	(30,000)	0
Due to seller payments and other			(15,279)	0
Ending Balance	17,699	113,128	17,699	113,128
Contingent consideration liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Decrease in fair value	(13,100)	(900)	2,800	9,525
Warrant Liabilities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Decrease in fair value	$ 5,365	$ (65,720)	$ 5,696	$ (8,383)