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Investment Activity (Assets Held for Sale and Long-Lived Assets Narrative) (Details) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Mar. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($) property	Sep. 30, 2024 USD ($) property	Sep. 30, 2023 USD ($) property
Real Estate [Line Items]
Rental income		$ 63,318	$ 62,255	$ 191,265	$ 188,505
Asset Held For Sale In 2023
Real Estate [Line Items]
Rental income					1,500
Real Estate Investments
Real Estate [Line Items]
Impairment of real estate			$ 1,200	$ 700	$ 1,600
Number of real estate properties, impaired, sold or classified as held for sale | property			1	1	4
Disposal Group, Held-for-sale, Not Discontinued Operations
Real Estate [Line Items]
Rental income		200	$ 600	$ 1,100
Disposal Group, Held-for-sale, Not Discontinued Operations | Senior Living Campuses | 2024 Disposal Group
Real Estate [Line Items]
Purchase price	$ 38,500
Lease income, annual rent	$ 2,800
Net real estate balance		$ 19,300		$ 19,300

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