Schedule IV - Reconciliation of Mortgage Loans on Real Estate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Balance at January 1,	$ 25,017,880	$ 22,003,017	$ 16,572,715
Additions during period:
Loan fundings	1,344,130	6,810,218	12,550,463
Payment-in-kind interest, net of interest received	2,865	0	0
Amortization of fees and other items	78,428	80,632	68,267
Deductions during period:
Loan repayments, sales, and cost-recovery proceeds	(2,924,401)	(3,168,155)	(6,733,105)
Principal charge-offs	0	0	(14,427)
Unrealized gain (loss) on foreign currency translation	286,102	(632,902)	(297,894)
Deferred fees and other items	(17,992)	(74,930)	(143,002)
Net balance at December 31,	23,787,012	25,017,880	22,003,017
CECL reserve	(576,936)	(326,137)	(124,679)
Total Loans, Net	$ 23,210,076	$ 24,691,743	$ 21,878,338