Fair Value - Narrative (Details)	3 Months Ended				6 Months Ended
	Jun. 30, 2023 USD ($) derivative shares	Mar. 31, 2023 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Jun. 30, 2023 USD ($) derivative shares	Jun. 30, 2022 USD ($)
Derivative instruments and Hedging Activities
Cash flow hedge losses reclassified to earnings	$ 354,000	$ 354,000	$ 1,013,000	$ 1,013,000	$ 708,000	$ 2,026,000
Number of DownREIT units redeemed (in shares) | shares	7,500				7,500
Cash Flow Hedges | Interest Rate Swaps
Derivative instruments and Hedging Activities
Forward interest rate swap agreements entered in period	$ 50,000,000				$ 250,000,000
Reclassification out of Accumulated Other Comprehensive Income
Derivative instruments and Hedging Activities
Estimated hedging losses to be reclassified from accumulated other comprehensive loss into earnings within the next twelve months					$ 1,415,000
Non-designated Hedges
Derivative instruments and Hedging Activities
Number of derivative instruments held | derivative	5				5