Schedule IV - Changes in Mortgage Loans Excluding Allowance for Credit Loss (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 Mortgage Loans on Real Estate [Abstract]
Balance at beginning of year	$ 310,101	$ 364,420	$ 213,320
New mortgage loans and additional advances on existing loans	100,824	155,223	177,924
Exchange rate fluctuations	(17,748)	31,530	(15,824)
Mortgage loans on real estate including additions during year	393,177	551,173	375,420
Collection of principal	(100,000)	(241,072)	(11,000)
Other	(173,265)
Deductions during year	(273,265)	(241,072)	(11,000)
Balance at end of year	$ 119,912	$ 310,101	$ 364,420