Schedule IV - Reconciliation of Mortgage Loans on Real Estate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Balance at January 1,	$ 22,003,017	$ 16,572,715	$ 16,164,801
Additions during period:
Loan fundings	6,810,218	12,550,463	1,896,276
Amortization of fees and other items	80,632	68,267	56,279
Deductions during period:
Loan repayments and sales proceeds	(3,168,155)	(6,733,105)	(1,862,955)
Principal charge-offs	0	(14,427)	0
Unrealized (loss) gain on foreign currency translation	(632,902)	(297,894)	340,260
Deferred fees and other items	(74,930)	(143,002)	(21,946)
Net balance at December 31,	25,017,880	22,003,017	16,572,715
CECL reserve	(326,137)	(124,679)	(173,549)
Total Loans, Net	$ 24,691,743	$ 21,878,338	$ 16,399,166