LOANS - Investment Loan Activity (Details) $ in Thousands	3 Months Ended
	Mar. 31, 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 / originations	3,919,866
Sales and transfers	(3,595,522)
Principal payments	(48,269)
Gains / (losses)	42,180
(Amortization) / accretion	(4,602)
Ending balance March 31, 2025	3,860,555	[2]
Transfer of residential loans to securitization vehicles, carrying value	$ 3,200,000

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

[2] (4)Includes $6.3 million and $10.0 million of residential mortgage loans held for sale at March 31, 2025 and December 31, 2024, respectively.