MORTGAGE SERVICING RIGHTS - Presentation of Activity Related to MSR (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Servicing Asset at Fair Value, Amount [Roll Forward]
Fair value, beginning of period	$ 3,281,190	$ 2,785,614	$ 2,909,134	$ 2,122,196
Purchases	283,437	64,750	719,468	701,377
Sales	0	(68,635)	0	(69,703)
Changes in valuation inputs or assumptions	(28,647)	(42,752)	12,585	63,286
Other changes, including realization of expected cash flows	(59,799)	(45,920)	(165,006)	(124,099)
Fair value, end of period	$ 3,476,181	$ 2,693,057	$ 3,476,181	$ 2,693,057