Organization and Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) Properties Property State Community shares	Mar. 31, 2023 USD ($) shares	Dec. 31, 2025 Property	Dec. 31, 2024 Property	Dec. 31, 2023 USD ($) shares
Real Estate Properties [Line Items]
General Partners' Capital Account, Units Outstanding | shares	116,728,052	116,600,756
Number of Real Estate Properties | Community	290
Development and capital improvements in progress	$ 380,087				$ 385,405
Number of States in which Entity Operates | State	16
Consolidated assets	$ 11,470,732				11,484,503
Consolidated liabilities	5,194,253				5,185,381
Real Estate Investments, Joint Ventures	$ 32,800
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
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other liabilities
Operating Lease, Right-of-Use Asset	$ 41,900				42,500
Right-of-use Lease, Liability	26,935				27,300
Marketable equity securities received	0	$ 7,700
Marketable equity securities	15,600				18,600
Marketable Equity Securities [Member]
Real Estate Properties [Line Items]
Investment Expense	3,000	900
Limited Partnership [Member]
Real Estate Properties [Line Items]
Investment Income	8,100	$ 100
Other Assets [Member]
Real Estate Properties [Line Items]
Real Estate Investments, Joint Ventures	55,100				46,500
Real Estate [Member] | Post Massachusetts Avenue [Member]
Real Estate Properties [Line Items]
Real Estate Investments, Joint Ventures	$ 41,900				$ 42,000
Maximum [Member] | Accounting Standards Update 2016-02 [Member]
Real Estate Properties [Line Items]
Operating lease, term of contract	1 year
Development Properties [Member]
Real Estate Properties [Line Items]
Number of units under development community | Properties	1,970
Development Properties [Member] | Scenario Forecast [Member]
Real Estate Properties [Line Items]
Number of Real Estate Properties | Property			2	3
Retail
Real Estate Properties [Line Items]
Number of Real Estate Properties | Property	34
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	116,728,052				116,694,124
Number of Real Estate Properties | Property	1
Development and capital improvements in progress	$ 380,087				$ 385,405
Consolidated assets	11,470,732				11,484,503
Consolidated liabilities	5,194,272				5,185,400
Limited Partnership [Member] | Real Estate [Member] | Variable Interest Entity Primary Beneficiary [Member]
Real Estate Properties [Line Items]
Consolidated assets	303,100				265,100
Consolidated liabilities	$ 9,600				$ 12,900
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
Real Estate Properties [Line Items]
Development and capital improvements in progress	$ 445,600