EXPENSES, REALIZED AND UNREALIZED GAINS (LOSSES), NET AND OTHER (AS RESTATED) - Schedule of General and Administrative Expenses (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]
Legal and professional													$ 103,795	$ 78,837	$ 102,114
Loan origination													45,123	108,149	196,989
Occupancy													55,883	116,526	70,616
Subservicing													130,346	162,972	224,138
Loan servicing													17,901	13,474	18,213
Property and maintenance													97,582	93,689	69,083
Other													281,839	303,496	184,648
Total general and administrative expenses	$ 192,380	$ 190,691	$ 181,918	$ 167,479	$ 189,646	$ 215,075	$ 225,758	$ 246,664	$ 349,397	$ 472,422	$ 540,088	$ 687,497	$ 732,469	$ 877,143	$ 865,801