MORTGAGE SERVICING RIGHTS - Presentation of Activity Related to MSR (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Servicing Asset at Fair Value, Amount [Roll Forward]
Fair value, beginning of period	$ 544,562	$ 100,895
Purchases	1,009,351	468,196
Transfers	82,650	0
Sales	(9,084)	(82,176)
Changes in valuation inputs or assumptions	205,463	120,879
Other changes, including realization of expected cash flows	(84,733)	(63,232)
Fair value, end of period	$ 1,748,209	$ 544,562