Real Estate and Other Activities - Net Assets Acquired (Parenthetical) (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2023	Dec. 31, 2024	Feb. 07, 2023
Business Acquisition [Line Items]
Weighted-average useful life of acquired intangible lease assets (in years)		22 years 8 months 12 days
Advanced to the mortgage loan	[1]	$ 0	$ 22,900	$ 0
Mortgage Loans [Member] | Springstone Health Opco, LLC [Member]
Business Acquisition [Line Items]
Advanced to the mortgage loan			$ 23,000		$ 23,000
Intangible Lease Assets [Member]
Business Acquisition [Line Items]
Weighted-average useful life of acquired intangible lease assets (in years)		19 years 10 months 24 days	24 years 9 months 18 days

[1] The 2023 column includes a $23 million mortgage loan that was converted to fee simple ownership of one property as described under the Lifepoint Transaction below.