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Investment Activity (Assets Held for Sale and Long-Lived Assets) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) property	Dec. 31, 2023 USD ($) property	Dec. 31, 2022 USD ($)
Real Estate [Line Items]
Number of properties | property		1
Rental income	$ 257,049	$ 249,227	$ 217,700
Impairment of property	0	$ 1,173	21,531
Real estate properties, impaired, sold or classified as held for sale | property		4
Real estate assets held for development and sale		$ 1,600
Real Estate Investments
Real Estate [Line Items]
Impairment of property	$ 700	$ 1,600	51,600
Real estate properties, impaired, sold or classified as held for sale | property	1	3
Real estate assets held for development and sale		$ 500
Senior Living Campuses | Disposal Group, Held-for-sale, Not Discontinued Operations | Two Thousand Twenty Four Disposal Group
Real Estate [Line Items]
Disposal group, including discontinued operation, consideration	$ 38,500
Lease income, annual rent	2,800
Disposal group, including discontinued operation, assets	19,100
Asset Held For Sale In 2022
Real Estate [Line Items]
Rental income	$ 900	$ 1,700	$ 900

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