SERVICING RIGHTS, AT FAIR VALUE - Changes in Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Transfers and Servicing [Abstract]
Due to changes in valuation inputs or assumptions	$ 75,366	$ (3,461)	$ 373,158	$ 98,295
Due to collection/realization of cash flows	(49,519)	(99,230)	(193,022)	(323,107)
Realized losses on sales of servicing rights	(13,489)	(14,218)	(5,949)	(8,224)
Net loss from derivatives hedging servicing rights	(50,837)	(21,553)	(314,557)	(94,158)
Changes in fair value of servicing rights, net	$ (38,479)	$ (138,462)	$ (140,370)	$ (327,194)