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	Jun. 30, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	$ 1,650,133	$ 1,499,790
Seniors Housing Operating
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	$ 1,271,079	1,171,307
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	$ 145,982	111,812
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	$ 233,072	$ 216,671
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%