EXPENSES, REALIZED AND UNREALIZED GAINS (LOSSES), NET AND OTHER - Schedule of General and Administrative Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other Income and Expenses [Abstract]
Legal and professional	$ 104,459	$ 103,795	$ 78,837
Loan origination	51,313	45,123	108,149
Occupancy	61,305	50,367	82,791
Subservicing	70,580	130,346	162,972
Loan servicing	41,958	17,901	13,474
Property and maintenance	122,581	97,582	93,689
Depreciation and amortization	124,131	80,681	89,501
Information technology	129,710	107,347	114,748
Other	162,447	127,960	151,901
Total General and Administrative Expenses	$ 868,484	$ 761,102	$ 896,062