Schedule IV - Reconciliation of Mortgage Loans on Real Estate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Balance at January 1,	$ 23,787,012	$ 25,017,880	$ 22,003,017
Additions during period:
Loan fundings	1,356,208	1,344,130	6,810,218
Payment-in-kind interest, net of interest received	16,660	2,865	0
Amortization of fees and other items	64,133	78,428	80,632
Deductions during period:
Loan repayments, sales, and cost-recovery proceeds	(4,751,286)	(2,924,401)	(3,168,155)
Charge-offs	(384,603)	0	0
Transfer to real estate owned	(590,937)	0	0
Transfer to other assets, net	(70,248)	0	0
Unrealized gain (loss) on foreign currency translation	(347,728)	286,102	(632,902)
Deferred fees and other items	(31,693)	(17,992)	(74,930)
Net balance at December 31,	19,047,518	23,787,012	25,017,880
CECL reserve	(733,936)	(576,936)	(326,137)
Total Loans, Net	$ 18,313,582	$ 23,210,076	$ 24,691,743