SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Operating Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Compensation and fringe benefits	$ 191,289	$ 252,415
Professional fees	41,372	37,280
Technology expenses	22,710	30,256
General and administrative expenses	26,496	25,415
Other operating expenses	5,271	9,070
Total operating costs	$ 287,138	$ 354,436