Organization and Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2024 USD ($) ApartmentUnits	Dec. 31, 2024 USD ($) Properties State Property Community shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($)	Dec. 31, 2027 Property	Dec. 31, 2026 Property	Dec. 31, 2025 Property
Real Estate Properties [Line Items]
General Partners' Capital Account, Units Outstanding | shares		116,883,421	116,694,124
Number of Real Estate Properties | Community		293
Number of States in which Entity Operates | State		16
Number of units under development community	239	2,312
Real Estate Investments, Joint Ventures		$ 30,600
Development and capital improvements in progress		470,282	$ 385,405
Consolidated assets		11,812,369	11,484,503
Consolidated liabilities		5,664,705	5,185,381
Initial funding on real estate land and land development	$ 70,500
Gain on consolidation of third-party development	(11,200)	(11,239)	0	$ 0
Development costs	$ 112,000
Real Estate Investment Property, at Cost		16,727,993	15,932,757
Marketable equity securities received		0	7,700	18,000
Marketable equity securities		3,300	18,600
Proceeds from sale of markable equity securities		9,975	0	0
Net realized / unrealized gain on sale		$ 8,300
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%
Advertising expenses		$ 31,700	$ 26,600	24,400
Operating Lease, Right-of-Use Asset, Statement of Financial Position		Other assets	Other assets
Operating Lease, Right-of-Use Asset		$ 40,500	$ 42,500
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]		Accrued Liabilities	Accrued Liabilities
Percentage of income tax on income from non arms length transactions		1
Right-of-use Lease, Liability		$ 26,091	$ 27,344
Marketable Equity Securities [Member]
Real Estate Properties [Line Items]
Unrealized gains (losses)		(5,300)	2,900	(10,000)
Leases, Acquired-in-Place
Real Estate Properties [Line Items]
Real Estate Investment Property, at Cost		1,000	1,600
Limited Partnership [Member]
Real Estate Properties [Line Items]
Investment Income		13,100	1,600	35,400
Real Estate [Member]
Real Estate Properties [Line Items]
Proceeds from (Payments to) Noncontrolling Interests, Total			15,800
Real Estate [Member] | Post Massachusetts Avenue [Member]
Real Estate Properties [Line Items]
Real Estate Investments, Joint Ventures		41,700	42,000
Other Assets [Member]
Real Estate Properties [Line Items]
Real Estate Investments, Joint Ventures		62,200	46,500
Parent Company [Member]
Real Estate Properties [Line Items]
Capitalized Development Costs, Period		$ 26,000	$ 20,600	14,400
Minimum [Member] | Land Improvements And Buildings
Real Estate Properties [Line Items]
Equipment, Useful Life		5 years
Minimum [Member] | Furniture and Fixtures
Real Estate Properties [Line Items]
Equipment, Useful Life		3 years
Maximum [Member] | Accounting Standards Update 2016-02 [Member]
Real Estate Properties [Line Items]
Operating lease, term of contract		1 year
Maximum [Member] | Land Improvements And Buildings
Real Estate Properties [Line Items]
Equipment, Useful Life		40 years
Maximum [Member] | Furniture and Fixtures
Real Estate Properties [Line Items]
Equipment, Useful Life		5 years
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
Limited Partnership [Member]
Real Estate Properties [Line Items]
General Partners' Capital Account, Units Outstanding | shares		116,883,421	116,694,124
Number of Real Estate Properties | Property		1
Development and capital improvements in progress		$ 470,282	$ 385,405
Consolidated assets		11,812,369	11,484,503
Consolidated liabilities		5,664,724	5,185,400
Gain on consolidation of third-party development		(11,239)	0	0
Real Estate Investment Property, at Cost		16,727,993	15,932,757
Proceeds from sale of markable equity securities		9,975	0	$ 0
Limited Partnership [Member] | Variable Interest Entity Primary Beneficiary [Member] | Real Estate [Member]
Real Estate Properties [Line Items]
Consolidated assets		432,200	265,100
Consolidated liabilities		$ 27,100	$ 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 [Member]
Real Estate Properties [Line Items]
Development and capital improvements in progress		$ 477,200
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%