EXPENSES, REALIZED AND UNREALIZED GAINS (LOSSES), NET AND OTHER (AS RESTATED) - Schedule of Components of Other Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Income and Expenses [Abstract]
Real estate and other securities													$ 39,362	$ (1,499,418)	$ (490,180)
Residential mortgage loans and REO													19,861	(160,985)	270,492
Derivative and hedging instruments													(54,342)	1,468,931	126,222
Notes and bonds payable													(12,843)	45,792	11,506
Consolidated CFEs													17,780	20,122	58,287
Other													(29,274)	(54,501)	(125,477)
Realized and unrealized gains (losses), net	$ 84,065	$ (114,149)	$ 76,533	$ (65,905)	$ 14,127	$ (30,970)	$ (137,901)	$ (72,655)	$ 10,628	$ (209,927)	$ (103,522)	$ (240,898)	(19,456)	(180,059)	(149,150)
Other income (loss)	(2,834)	6,888	(47,898)	(25,166)	(3,650)	23,242	59,388	52,332	(73,064)	111,720	(66,176)	134,962	(69,010)	(145,385)	3,241
Total other income (loss)	$ 81,231	$ (107,261)	$ 28,635	$ (91,071)	$ 10,477	$ (7,728)	$ (78,513)	$ (20,323)	$ (62,436)	$ (98,207)	$ (169,698)	$ (105,936)	$ (88,466)	$ (325,444)	$ (145,909)