Organization and Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($) Properties Property Community State shares	Jun. 30, 2022 USD ($) shares	Jun. 30, 2023 USD ($) Properties Property Community State shares	Jun. 30, 2022 USD ($) 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	116,676,966	115,438,832	116,676,966	115,438,832
Number of Real Estate Properties | Community	290		290
Development and capital improvements in progress	$ 394,798		$ 394,798					$ 332,035
Number of States in which Entity Operates | State	16		16
Consolidated assets	$ 11,391,170		$ 11,391,170					11,241,165
Consolidated liabilities	5,020,107		5,020,107					5,030,746
Real Estate Investments, Joint Ventures	$ 39,600		$ 39,600
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	$ 43,500		$ 43,500					44,600
Right-of-use Lease, Liability	27,977		27,977					28,700
Marketable equity securities	22,400		22,400					8,000
Investment Income	7,500		6,600
Investment Expense		$ 1,800		$ 3,300
Limited Partnership [Member]
Real Estate Properties [Line Items]
Investment Income	800		700
Investment Expense		$ 19,100		27,800
Other Assets [Member]
Real Estate Properties [Line Items]
Real Estate Investments, Joint Ventures	35,300		35,300					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		$ 42,300					$ 42,300
Maximum [Member] | Accounting Standards Update 2016-02 [Member]
Real Estate Properties [Line Items]
Operating lease, term of contract	1 year		1 year
Development Properties [Member]
Real Estate Properties [Line Items]
Number of Real Estate Properties | Community	6		6
Number of units under development community | Properties	2,310		2,310
Development Properties [Member] | Expected Costs
Real Estate Properties [Line Items]
Development and capital improvements in progress	$ 735,000		$ 735,000
Development Properties [Member] | Scenario Forecast [Member]
Real Estate Properties [Line Items]
Number of Real Estate Properties | Property					2	3	1
Retail
Real Estate Properties [Line Items]
Number of Real Estate Properties | Property	34		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	116,676,966		116,676,966					115,480,336
Number of Real Estate Properties | Property	1		1
Development and capital improvements in progress	$ 394,798		$ 394,798					$ 332,035
Consolidated assets	11,391,170		11,391,170					11,241,165
Consolidated liabilities	5,020,126		5,020,126					5,030,765
Limited Partnership [Member] | Real Estate [Member] | Variable Interest Entity Primary Beneficiary [Member]
Real Estate Properties [Line Items]
Consolidated assets	310,700		310,700					279,600
Consolidated liabilities	$ 17,800		$ 17,800					$ 14,500
Limited Partnership [Member] | Minimum [Member]
Real Estate Properties [Line Items]
Percentage of ownership interests of all consolidated subsidiaries (percent)	80.00%		80.00%
Limited Partnership [Member] | Maximum [Member]
Real Estate Properties [Line Items]
Percentage of ownership interests of all consolidated subsidiaries (percent)	100.00%		100.00%
Limited Partnership [Member] | Development Properties [Member] | Costs Incurred To Date
Real Estate Properties [Line Items]
Development and capital improvements in progress	$ 391,500		$ 391,500