The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The book value of investments in real estate joint ventures including direct and indirect investments.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Investments in Unconsolidated Entities - Summary of Investments in Unconsolidated Entities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	$ 1,719,646	$ 1,636,531
Seniors Housing Operating
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	$ 1,334,405	1,248,774
Seniors Housing Operating \| Minimum
Schedule of Equity Method Investments [Line Items]
Percentage ownership	10.00%
Seniors Housing Operating \| Maximum
Schedule of Equity Method Investments [Line Items]
Percentage ownership	95.00%
Triple-net
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	$ 141,117	147,679
Triple-net \| Minimum
Schedule of Equity Method Investments [Line Items]
Percentage ownership	10.00%
Triple-net \| Maximum
Schedule of Equity Method Investments [Line Items]
Percentage ownership	88.00%
Outpatient Medical
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	$ 244,124	$ 240,078
Outpatient Medical \| Minimum
Schedule of Equity Method Investments [Line Items]
Percentage ownership	15.00%
Outpatient Medical \| Maximum
Schedule of Equity Method Investments [Line Items]
Percentage ownership	50.00%