Debt - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended
Debt - Narrative (Details) $ in Thousands	Jun. 30, 2025 USD ($) property apartment	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) property apartment	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Loss on extinguishment of debt in conjunction with a property sale	$ (922)	$ 0	$ (2,030)	$ 0
Variable Rate Property Debt \| Secured Debt
Debt Instrument [Line Items]
Long-term debt, gross	3,983,833		3,983,833		$ 4,140,409
Fixed Rate Property Debt \| Secured Debt
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,952,651		1,952,651		$ 2,144,797
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Variable Rate Property Debt
Debt Instrument [Line Items]
Loss on extinguishment of debt in conjunction with a property sale			$ (1,100)
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Wholly And Partially Owned Consolidated Properties
Debt Instrument [Line Items]
Apartment communities owned by VIEs \| property	2		2
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Wholly And Partially Owned Consolidated Properties \| San Francisco, California and Minneapolis, Minnesota
Debt Instrument [Line Items]
Apartment communities owned by VIEs \| apartment	11		11
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Wholly And Partially Owned Consolidated Properties \| Boston, Massachusetts, Denver, Colorado, and San Diego, California
Debt Instrument [Line Items]
Apartment communities owned by VIEs \| apartment	3		3
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Wholly And Partially Owned Consolidated Properties \| Variable Rate Property Debt \| Secured Debt \| San Francisco, California and Minneapolis, Minnesota
Debt Instrument [Line Items]
Long-term debt, gross	$ 89,500		$ 89,500
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Wholly And Partially Owned Consolidated Properties \| Variable Rate Property Debt \| Secured Debt \| Boston, Massachusetts, Denver, Colorado, and San Diego, California
Debt Instrument [Line Items]
Long-term debt, gross	129,300		129,300
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Wholly And Partially Owned Consolidated Properties \| Fixed Rate Property Debt \| Secured Debt
Debt Instrument [Line Items]
Long-term debt, gross	$ 107,300		$ 107,300