Real Estate Investments - Acquisitions (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) apartment	Dec. 31, 2022 USD ($) community apartment	Dec. 31, 2021 USD ($)
Acquisitions of Real Estate
Number of communities held by acquired investment | community		2
Gain on remeasurement of co-investment	$ 0	$ 17,423	$ 2,260
Land and Land Improvements
Acquisitions of Real Estate
Purchase price	5,500
Land and Land Improvements | CPPIB Interest
Acquisitions of Real Estate
Purchase price		14,100
Building and Improvements
Acquisitions of Real Estate
Purchase price	18,000
Building and Improvements | CPPIB Interest
Acquisitions of Real Estate
Purchase price		52,700
Prepaid Expenses and Other Assets
Acquisitions of Real Estate
Purchase price	$ 100
Prepaid Expenses and Other Assets | CPPIB Interest
Acquisitions of Real Estate
Purchase price		$ 300
Apartment Building
Acquisitions of Real Estate
Number of units acquired | apartment	73
Purchase price	$ 23,100
Number of communities held by acquired investment | community		1
Apartment Building | Regency Palm Court and Windsor Court
Acquisitions of Real Estate
Number of units acquired | apartment		211
Purchase price		$ 32,900
Investment interest acquired		49.80%
Gain on remeasurement of co-investment	$ 0	$ 17,400