LOANS - Investment Loan Activity (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2025 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Beginning balance January 1, 2025	$ 3,546,902	[1],[2]
Purchases / organizations / draws	12,841,249
Sales and transfers	(12,205,575)
Principal payments	(217,068)
Gains / (losses)	58,550
(Amortization) / accretion	(15,759)
Ending balance September 30, 2025	4,008,299	[2]
Exercise of optional redemption provisions of securitization vehicles, carrying value	290,400
Transfer of residential loans to securitization vehicles, carrying value	$ 10,900,000

[1] (1)Derived from the audited consolidated financial statements at December 31, 2024.

[2] (4)Includes $10.9 million and $10.0 million of residential mortgage loans held for sale at September 30, 2025 and December 31, 2024, respectively.