Real Estate and Other Activities - Net Assets Acquired (Detail) - USD ($) $ in Thousands		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Total assets acquired		$ 105,618	$ 235,187	$ 1,332,962
Liabilities assumed		(2,290)		(25,727)
Loans repaid	[1]	0	(22,900)	0
Total net assets acquired		105,618	212,287	1,332,962
Land and Land Improvements [Member]
Business Acquisition [Line Items]
Total assets acquired		0	28,916	135,301
Building [Member]
Business Acquisition [Line Items]
Total assets acquired		0	114,966	487,698
Intangible Lease Assets [Member]
Business Acquisition [Line Items]
Total assets acquired		0	16,305	45,394
Mortgage Loans [Member]
Business Acquisition [Line Items]
Total assets acquired		0	0	159,735
Other Loans [Member]
Business Acquisition [Line Items]
Total assets acquired		0	25,000	0
Investments in Unconsolidated Real Estate Joint Ventures [Member]
Business Acquisition [Line Items]
Total assets acquired		107,908	0	399,456
Investments In Unconsolidated Operating Entities [Member]
Business Acquisition [Line Items]
Total assets acquired		$ 0	$ 50,000	$ 131,105

[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.