LOANS - Investment Loan Activity (Details) $ in Thousands	6 Months Ended
	Jun. 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 / originations	8,073,294
Sales and transfers	(7,798,003)
Principal payments	(129,271)
Gains / (losses)	39,685
(Amortization) / accretion	(10,335)
Ending balance June 30, 2025	3,722,272	[2]
Transfer of residential loans to securitization vehicles, carrying value	$ 7,000,000

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

[2] (4)Includes $0.2 million and $10.0 million of residential mortgage loans held for sale at June 30, 2025 and December 31, 2024, respectively.