Debt - Narrative (Details) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) apartment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Line of Credit Facility [Line Items]
Long-term debt, gross			$ 2,801,421
Non-recourse property debt, net			2,223,791	$ 1,985,430
Repayments of debt			$ 325,000	350,000	$ 350,000
Minimum
Line of Credit Facility [Line Items]
Fixed charges coverage ratio			1.50
Secured indebtedness to total assets ratio			0.40
Maximum unsecured leverage ratio			60.00%
Unsecured interest coverage ratio			1.50
Minimum | Leverage Ratio
Line of Credit Facility [Line Items]
Unsecured leverage ratio			0.60
Interest Expense
Line of Credit Facility [Line Items]
Debt issuance costs, gross		$ 800
Unsecured debt | Term Loan
Line of Credit Facility [Line Items]
Long-term debt, gross			$ 475,000	800,000
Repayments of debt		325,000
Core JV
Line of Credit Facility [Line Items]
Long-term debt, gross			373,300
Non-recourse property debt, net			644,400
Fifteen Year Fixed Rate Financing
Line of Credit Facility [Line Items]
Revolving credit facility	$ 1,000,000
Loan term	15 years
Line of credit, current liquidity			1,900,000
Fixed Rate Property Debt
Line of Credit Facility [Line Items]
Aggregate gross book value			$ 2,500,000
Fixed Rate Property Debt | Pledged as Collateral
Line of Credit Facility [Line Items]
Number of apartment communities | apartment			26
Fixed Rate Property Debt | Secured Debt
Line of Credit Facility [Line Items]
Long-term debt, gross			$ 2,236,975	1,906,151
Fixed Rate Property Debt | Nine Properties | Core JV | Secured Debt
Line of Credit Facility [Line Items]
Long-term debt, gross		611,400
Fixed Rate Property Debt | One Property | Core JV | Secured Debt
Line of Credit Facility [Line Items]
Long-term debt, gross		33,000
Term Loan Maturity on December 15, 2023
Line of Credit Facility [Line Items]
Repayments of debt		150,000
Term Loan Maturity on December 15, 2024
Line of Credit Facility [Line Items]
Repayments of debt		$ 175,000
Variable Rate Property Debt | Secured Debt
Line of Credit Facility [Line Items]
Long-term debt, gross			$ 0	$ 88,500