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Real Property Acquisitions and Development - Narrative (Details) $ in Thousands		1 Months Ended	3 Months Ended						9 Months Ended
	Apr. 01, 2022 USD ($) property	Oct. 31, 2023 USD ($) property	Sep. 30, 2023 USD ($) joint_venture property	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)
Business Acquisition [Line Items]
Release of cash in contract termination	$ 6,883
Net change in noncontrolling interests			$ (53,995)	$ 153,120	$ (21,344)	$ (10,401)	$ (112,033)	$ 191,331
Joint Ventures, Canadian Pension Plan Investment Board
Business Acquisition [Line Items]
Ownership interest			45.00%
Acquisitions of noncontrolling interests			$ 69,606
Number of joint ventures \| joint_venture			2
Net change in noncontrolling interests			$ 118,256
Joint Ventures, Canadian Pension Plan Investment Board \| Office Building
Business Acquisition [Line Items]
Number of properties \| property			10
Subsequent event \| Partnership with Cogir Management Corporation
Business Acquisition [Line Items]
Ownership percentage by parent		95.00%
Subsequent event \| Partnership with Cogir Management Corporation \| Cogir Management Corporation
Business Acquisition [Line Items]
Ownership interest		5.00%
Other Income
Business Acquisition [Line Items]
Gain (loss) from derecognition of the ROU asset and lease liability									$ 58,621
Holiday Retirement
Business Acquisition [Line Items]
Number of properties \| property	17
Seniors Housing Operating Properties, Canada \| Subsequent event
Business Acquisition [Line Items]
Property acquired \| property		12
Consideration transferred		$ 678,000
Debt assumed		$ 59,000