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Real Estate and Other Investments - Narrative (Details) $ in Thousands				3 Months Ended		6 Months Ended
	Aug. 01, 2025 USD ($) property	Jul. 15, 2025 USD ($)	Feb. 14, 2025 USD ($)	Jun. 30, 2025 USD ($) property jointVenture state	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) property jointVenture state	Jun. 30, 2024 USD ($)
Real Estate
Number of properties owned (property)				341		341
Number of states in which properties are located | state				34		34
Number of states | state						5
Impairment of assets | $				$ 30,993	$ 6,545	$ 69,465	$ 18,687
Equity method investment distribution | $						$ 17,000	$ 0
AlerisLife Inc
Real Estate
Equity method investment distribution | $			$ 17,000
AlerisLife Inc
Real Estate
Payments of dividends | $			$ 50,000
Subsequent Event | AlerisLife Inc
Real Estate
Equity method investment distribution | $		$ 3,400
Subsequent Event | AlerisLife Inc
Real Estate
Payments of dividends | $		$ 10,000
Senior Secured Note Due 2026 | Subsequent Event
Real Estate
Redemption of senior notes | $	$ 90,588
Joint Venture
Real Estate
Number of unconsolidated joint ventures | jointVenture				2		2
Senior Living Communities
Real Estate
Number of properties closed				1		1
Medical Office
Real Estate
Number of properties impaired				10		10
Impairment of assets | $				$ 13,794		$ 52,266
Held for sale
Real Estate
Number of properties owned (property)				21		21
Held for sale | Subsequent Event
Real Estate
Number of properties owned (property)	49
Held for sale | Senior Secured Note Due 2026
Real Estate
Number of real estate properties under agreement				2		2
Held for sale | Senior Secured Note Due 2026 | Subsequent Event
Real Estate
Number of real estate properties under agreement	11
Held for sale | Senior Living Communities
Real Estate
Number of properties impaired				10		10
Impairment of assets | $						$ 17,199
Held for sale | Medical Office
Real Estate
Number of properties owned (property)				4		4
Held for sale | Medical Office | Subsequent Event
Real Estate
Number of properties owned (property)	7

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