Schedule IV - Changes in Mortgage Loans Net of Allowance for Credit Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract]
Balance at beginning of year	$ 119,912	$ 310,101	$ 364,420
New mortgage loans and additional advances on existing loans	16,498	100,824	155,223
Exchange rate fluctuations	21,722	(17,748)	31,530
Mortgage loans on real estate including additions during year	158,132	393,177	551,173
Collection of principal	(16,886)	(100,000)	(241,072)
Other	(17,595)	(173,265)
Deductions during year	(34,481)	(273,265)	(241,072)
Balance at end of year	$ 123,651	$ 119,912	$ 310,101