DERIVATIVES - Derivatives Gain (Losses) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Derivative [Line Items]
Servicing revenue, net	$ 0	$ 0	$ 0	$ 7,189,000
Gain on originated residential mortgage loans, held-for-sale, net	50,630,000	(151,654,000)	17,640,000	(33,216,000)
Gain (loss) on settlement of investments, net	215,952,000	416,393,000	64,945,000	1,038,565,000
Total gain (loss)	266,582,000	264,739,000	82,585,000	1,012,538,000
Gain (loss) on settlement of residential mortgage loan	(11,483,000)	526,933,000	(1,579,000)	1,051,756,000
Servicing Revenue
Derivative [Line Items]
Gain (loss) on settlement of derivative instruments	0	0	0	(76,800,000)
TBAs
Derivative [Line Items]
Servicing revenue, net	0	0	0	3,300,000
Gain on originated residential mortgage loans, held-for-sale, net	71,212,000	(229,135,000)	13,229,000	16,988,000
Gain (loss) on settlement of investments, net	507,000	175,121,000	(6,875,000)	358,638,000
Treasury futures
Derivative [Line Items]
Servicing revenue, net	0	0	0	(1,746,000)
Options on treasury futures
Derivative [Line Items]
Servicing revenue, net	0	0	0	5,635,000
Interest rate lock commitments
Derivative [Line Items]
Gain on originated residential mortgage loans, held-for-sale, net	(19,898,000)	77,481,000	6,342,000	(50,204,000)
Interest rate swaps
Derivative [Line Items]
Gain on originated residential mortgage loans, held-for-sale, net	(684,000)	0	(1,931,000)	0
Gain (loss) on settlement of investments, net	$ 215,445,000	$ 241,272,000	$ 71,820,000	$ 679,927,000