Organization and Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($) Properties Property Community State shares	Mar. 31, 2024 USD ($) shares	Dec. 31, 2027 Property	Dec. 31, 2026 Property	Dec. 31, 2025 Property	Dec. 31, 2024 USD ($) shares
Real Estate Properties [Line Items]
General Partners' Capital Account, Units Outstanding | shares	116,916,381	116,728,052
Number of Real Estate Properties | Community	291
Number of units under development community | Properties	2,312
Development and capital improvements in progress	$ 485,254					$ 470,282
Number of States in which Entity Operates | State	16
Consolidated assets	$ 11,811,957					11,812,369
Consolidated liabilities	5,654,062					$ 5,664,705
Real Estate Investments, Joint Ventures	$ 26,900
Percentage Of Rental Revenue From Leasing Of Apartment Homes	94.00%
Percentage Of Reimbursable Revenue From Leasing Of Apartment Homes	5.00%
Percentage of Rental Revenue and Other Income From Non-leasing Activities	1.00%
Operating Lease, Right-of-Use Asset, Statement of Financial Position	Other assets					Other assets
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other liabilities					Accrued expenses and other liabilities
Operating Lease, Right-of-Use Asset	$ 39,900					$ 40,500
Right-of-use Lease, Liability	25,672					26,100
Marketable equity securities	2,300					3,300
Marketable Equity Securities [Member]
Real Estate Properties [Line Items]
Investment Expense	1,000	$ 3,000
Limited Partnership [Member]
Real Estate Properties [Line Items]
Investment Income	1,700	$ 8,100
Other Assets [Member]
Real Estate Properties [Line Items]
Real Estate Investments, Joint Ventures	67,600					62,200
Real Estate [Member] | Post Massachusetts Avenue [Member]
Real Estate Properties [Line Items]
Real Estate Investments, Joint Ventures	$ 41,800					$ 41,700
Maximum [Member] | Accounting Standards Update 2016-02 [Member]
Real Estate Properties [Line Items]
Operating lease, term of contract	1 year
Development Properties [Member] | Scenario Forecast [Member]
Real Estate Properties [Line Items]
Number of Real Estate Properties | Property			1	4	2
Retail [Member]
Real Estate Properties [Line Items]
Number of Real Estate Properties | Property	35
M A A L P [Member]
Real Estate Properties [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	97.40%	97.40%
Limited Partnership [Member]
Real Estate Properties [Line Items]
General Partners' Capital Account, Units Outstanding | shares	116,916,381					116,883,421
Number of Real Estate Properties | Property	1
Development and capital improvements in progress	$ 485,254					$ 470,282
Consolidated assets	11,811,957					11,812,369
Consolidated liabilities	5,654,081					5,664,724
Limited Partnership [Member] | Real Estate [Member] | Variable Interest Entity Primary Beneficiary [Member]
Real Estate Properties [Line Items]
Consolidated assets	463,800					432,200
Consolidated liabilities	$ 20,800					$ 27,100
Limited Partnership [Member] | Minimum [Member]
Real Estate Properties [Line Items]
Percentage of ownership interests of all consolidated subsidiaries (percent)	80.00%
Limited Partnership [Member] | Maximum [Member]
Real Estate Properties [Line Items]
Percentage of ownership interests of all consolidated subsidiaries (percent)	100.00%
Limited Partnership [Member] | Development Properties [Member] | Costs Incurred To Date [Member]
Real Estate Properties [Line Items]
Development and capital improvements in progress	$ 546,500