EXPENSES, REALIZED AND UNREALIZED GAINS (LOSSES), NET AND OTHER - Schedule of General and Administrative Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Other Income and Expenses [Abstract]
Legal and professional	$ 21,489	$ 12,755
Loan origination	15,397	11,757
Occupancy	17,048	18,366
Subservicing	19,428	35,256
Loan servicing	4,935	2,976
Property and maintenance	32,264	24,035
Information technology	41,202	34,968
Other	43,355	27,042
Total general and administrative expenses	$ 195,118	$ 167,155