Real Estate and Other Activities - Summary of Activity in Credit Loss Reserves (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026		Sep. 30, 2025
Receivables [Abstract]
Balance at beginning of the period		$ 66,264	$ 564,796	$ 553,297		$ 511,473
Provision for credit loss, net	[1]	8,696	85,111	47,153		138,434
Expected credit loss reserve written off or related to financial instruments sold, repaid, or satisfied		0	0	(525,490)	[2]	0	[2]
Balance at end of the period		$ 74,960	$ 649,907	$ 74,960		$ 649,907

[1] The amount in 2026 is primarily related to loans to Tenor and Insight, whereas, the amount in 2025 is primarily related to Prospect. See "Leasing Operations (Lessor)" in this Note 3 for further discussion.

[2] The amount in 2026 is primarily related to write-offs of previously reserved Prospect mortgages and other financing leases. See "Leasing Operations (Lessor)" in this Note 3 for further discussion.