COST OF REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Cost of Revenue [Abstract]
Compensation and benefits	$ 11,885	$ 15,171	$ 39,231	$ 55,655
Outside fees and services	15,319	16,891	42,573	52,473
Technology and telecommunications	4,656	6,391	14,844	18,972
Reimbursable expenses	1,957	1,416	6,158	5,365
Depreciation and amortization	570	798	1,805	2,397
Total	$ 34,387	$ 40,667	$ 104,611	$ 134,862