RESIDENTIAL MORTGAGE LOANS - Gain On Sale of Originated Mortgage Loans, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Long Lived Assets Held-for-sale [Line Items]
Gain (loss) on residential mortgage loans originated and sold, net	$ (178,658)	$ (141,327)	$ (332,793)	$ (933,582)
Gain (loss) on settlement of residential mortgage loan origination derivative instruments	67,377	57,407	65,798	1,109,163
MSRs retained on transfer of residential mortgage loans	266,644	268,613	609,460	1,059,535
Other	5,892	2,763	2,751	32,302
Realized gain on sale of originated residential mortgage loans, net	161,255	187,456	345,216	1,267,418
Change in fair value of derivative instruments	7,274	129,233	24,914	96,017
Gain on originated residential mortgage loans, held-for-sale, net	149,230	203,479	410,320	980,266
Loan origination fees and direct loan origination costs	105,900	156,800	268,800	526,100
Change in fair value of interest rate lock commitments
Long Lived Assets Held-for-sale [Line Items]
Change in fair value of derivative instruments	(8,630)	(104,440)	(2,288)	(154,644)
Change in fair value of derivative instruments
Long Lived Assets Held-for-sale [Line Items]
Change in fair value of derivative instruments	15,904	233,673	27,202	250,661
Change in fair value of residential mortgage loans
Long Lived Assets Held-for-sale [Line Items]
Change in fair value of residential mortgage loans	$ (19,299)	$ (113,210)	$ 40,190	$ (383,169)