Organization and Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) Properties State Property Community shares	Mar. 31, 2022 USD ($) shares	Dec. 31, 2025 Property	Dec. 31, 2024 Property	Dec. 31, 2023 Property	Dec. 31, 2022 USD ($) shares
Real Estate Properties [Line Items]
General Partners' Capital Account, Units Outstanding | shares	116,600,756	115,337,466
Number of Real Estate Properties | Community	290
Development and capital improvements in progress	$ 391,439					$ 332,035
Number of States in which Entity Operates | State	16
Consolidated assets	$ 11,352,311					11,241,165
Consolidated liabilities	4,961,725					5,030,746
Real Estate Investments, Joint Ventures	$ 44,000
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	$ 44,000					44,600
Right-of-use Lease, Liability	28,290					28,700
Marketable equity securities	14,900					8,000
Investment Income, Investment Expense	$ 900	$ 1,500
Operating lease weighted average remaining lease term	33 years
Operating lease weighted average discount rate	4.50%
Limited Partnership [Member]
Real Estate Properties [Line Items]
Investment Income, Investment Expense	$ 100	8,700
Other Assets [Member]
Real Estate Properties [Line Items]
Real Estate Investments, Joint Ventures	30,100					$ 36,700
Real Estate [Member]
Real Estate Properties [Line Items]
Cash proceeds		$ 43,100
Real Estate [Member] | Post Massachusetts Avenue [Member]
Real Estate Properties [Line Items]
Real Estate Investments, Joint Ventures	$ 42,300
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 Real Estate Properties | Community	6
Number of units under development community | Properties	2,310
Development Properties [Member] | Expected Costs
Real Estate Properties [Line Items]
Development and capital improvements in progress	$ 731,500
Development Properties [Member] | Scenario Forecast [Member]
Real Estate Properties [Line Items]
Number of Real Estate Properties | Property			2	2	2
Retail
Real Estate Properties [Line Items]
Number of Real Estate Properties | Property	34
M A A L P
Real Estate Properties [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	97.40%	97.30%
Limited Partnership [Member]
Real Estate Properties [Line Items]
General Partners' Capital Account, Units Outstanding | shares	116,600,756					115,480,336
Number of Real Estate Properties | Property	1
Development and capital improvements in progress	$ 391,439					$ 332,035
Consolidated assets	11,352,311					11,241,165
Consolidated liabilities	4,961,744					5,030,765
Limited Partnership [Member] | Real Estate [Member] | Variable Interest Entity Primary Beneficiary [Member]
Real Estate Properties [Line Items]
Consolidated assets	300,100					279,600
Consolidated liabilities	$ 22,300					$ 14,500
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	$ 342,600