Real Estate and Other Activities - Summary of Activity in Credit Loss Reserves (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Receivables [Abstract]
Balance at beginning of the year	$ 564,796	$ 538,534	$ 511,473	$ 96,001
Provision for credit loss, net	85,111	438,154	138,434	880,687
Expected credit loss reserve written off or related to financial instruments sold, repaid, or satisfied	0	(825,548)	0	(825,548)
Balance at end of the period	$ 649,907	$ 151,140	$ 649,907	$ 151,140