DERIVATIVES AND HEDGING - Derivatives and Hedging Gain (Losses) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Total Gain (Loss)	$ (127,924,000)	$ (103,358,000)	$ 1,380,323,000
Gain (loss) on settlement of derivative instruments	0		(79,000,000)
Gain (loss) on settlement of residential mortgage loan	$ 28,157,000	$ 73,476,000	$ 1,285,219,000
Servicing Revenue
Derivative [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Revenue	Revenue	Revenue
Total Gain (Loss)	$ 0	$ 0	$ (11,316,000)
Gain on originated residential mortgage loans, held-for-sale, net
Derivative [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Revenue	Revenue	Revenue
Total Gain (Loss)	$ 78,226,000	$ (49,016,000)	$ (77,292,000)
Change In Fair Value Of Investments
Derivative [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized and unrealized gains (losses), net	Realized and unrealized gains (losses), net	Realized and unrealized gains (losses), net
Total Gain (Loss)	$ (206,150,000)	$ (54,342,000)	$ 1,468,931,000
TBAs | Servicing Revenue
Derivative [Line Items]
Total Gain (Loss)	0	0	(15,205,000)
TBAs | Gain on originated residential mortgage loans, held-for-sale, net
Derivative [Line Items]
Total Gain (Loss)	90,675,000	(62,924,000)	25,700,000
TBAs | Change In Fair Value Of Investments
Derivative [Line Items]
Total Gain (Loss)	(269,862,000)	(7,326,000)	309,154,000
IRLCs
Derivative [Line Items]
Total Gain (Loss)	(12,449,000)	15,018,000	(102,992,000)
Treasury futures
Derivative [Line Items]
Total Gain (Loss)	0	0	(1,746,000)
Options on Treasury futures
Derivative [Line Items]
Total Gain (Loss)	0	0	5,635,000
Interest rate swaps | Gain on originated residential mortgage loans, held-for-sale, net
Derivative [Line Items]
Total Gain (Loss)	0	(1,110,000)	0
Interest rate swaps | Change In Fair Value Of Investments
Derivative [Line Items]
Total Gain (Loss)	63,448,000	20,990,000	1,159,777,000
Treasury short sales
Derivative [Line Items]
Total Gain (Loss)	23,783,000	(68,006,000)	0
Other commitments
Derivative [Line Items]
Total Gain (Loss)	(25,535,000)	0	0
Stock options
Derivative [Line Items]
Total Gain (Loss)	(3,000)	0	0
Foreign exchange forwards
Derivative [Line Items]
Total Gain (Loss)	$ 2,019,000	$ 0	$ 0