Significant Transactions During the Nine Months Ended September 30, 2024 and Subsequent Events (Details) $ in Thousands	1 Months Ended							3 Months Ended		9 Months Ended
	Oct. 31, 2024 USD ($) apartment community	Sep. 30, 2024 USD ($) unit apartment	Jul. 31, 2024 USD ($) apartment	May 31, 2024 USD ($) apartment	Apr. 30, 2024 USD ($) apartment	Mar. 31, 2024 USD ($) community apartment	Aug. 31, 2022 USD ($) community	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) apartment	Sep. 30, 2023 USD ($)	Aug. 31, 2024 USD ($)
Other Commitments [Line Items]
Gain on remeasurement of co-investment								$ 31,583	$ 0	$ 169,909	$ 0
Income (loss) from equity method investments								11,649	10,694	33,667	33,802
Proceeds from dispositions of co-investments			$ 40,100	$ 10,300
Preferred return rate				12.00%
Proceeds from preferred equity investment										35,096	48,229
Subsequent Event
Other Commitments [Line Items]
Proceeds from preferred equity investment	$ 55,800
Essex Portfolio, L.P.
Other Commitments [Line Items]
Gain on remeasurement of co-investment								31,583	0	169,909	0
Income (loss) from equity method investments								$ 11,649	$ 10,694	33,667	33,802
Proceeds from preferred equity investment										$ 35,096	$ 48,229
Senior Notes
Other Commitments [Line Items]
Debt instrument, repaid, principal				$ 400,000
Unsecured Bonds 5.500%, Due April 2034 | Bonds public offering - fixed rate, net | Essex Portfolio, L.P.
Other Commitments [Line Items]
Debt instrument face amount						$ 350,000
Interest rate						5.50%
Debt instrument, debt offering price, percentage of principal						99.752%
Unsecured Bonds 5.500%, Due April 2034 | Senior Notes
Other Commitments [Line Items]
Debt instrument face amount												$ 200,000
Debt instrument debt offering price percentage of principal amount												102.871%
Debt instrument debt offering price reoffer yield percentage												5.11%
Related Party
Other Commitments [Line Items]
Number of communities owned | community							3
Notes receivable							$ 11,200
Notes receivable, interest rate							9.50%
Related Party Bridge Loan On Property Acquired By BEX II | Related Party
Other Commitments [Line Items]
Notes receivable					$ 53,600	$ 53,600
Debt instrument, variable interest rate, type [extensible enumeration]					Secured Overnight Financing Rate (SOFR) [Member]
Notes receivable, interest rate					1.50%
ARLO Apartments Located in Mountain View
Other Commitments [Line Items]
Number of units acquired | apartment				164
Payments to acquire real estate				$ 101,100
Apartment Homes Located in Sunnyvale, CA
Other Commitments [Line Items]
Number of units acquired | apartment					75
Debt instrument, repaid, principal					$ 32,100
Commitment to fund preferred equity investment					14,700
Repayments of secured debt					$ 46,600
BEXAEW LLC
Other Commitments [Line Items]
Joint venture ownership percent						49.90%
Number of units acquired | apartment						1,480
Payments to acquire real estate						$ 505,000
Debt instrument, repaid, principal						$ 219,900
Number of communities owned | community						4
Income (loss) from equity method investments						$ 1,500
BEXAEW LLC | Related Party Bridge Loan On Property Acquired By BEX II | Related Party
Other Commitments [Line Items]
Debt instrument, variable interest rate, type [extensible enumeration]						Secured Overnight Financing Rate (SOFR) [Member]
Notes receivable, interest rate						1.50%
BEX II Portfolio | Subsequent Event
Other Commitments [Line Items]
Joint venture ownership percent	49.90%
Payments to acquire real estate	$ 337,500
Debt instrument, repaid, principal	$ 95,000
Number of communities owned | community	4
Number of units | apartment	871
Apartment Building
Other Commitments [Line Items]
Number of units acquired | apartment										697
Apartment Building | BEXAEW LLC
Other Commitments [Line Items]
Gain on remeasurement of co-investment						$ 138,300
Century Towers
Other Commitments [Line Items]
Joint venture ownership percent		50.00%						50.00%		50.00%
Number of units acquired | apartment		376								376
Payments to acquire real estate		$ 173,500
Number of OP units acquired | unit		81,737
Number of OP units agreed price, per unit		$ 305
Debt instrument, repaid, principal		110,500
Gain on remeasurement of co-investment		$ 29,400
Patina at Midtown
Other Commitments [Line Items]
Joint venture ownership percent		49.90%	49.90%					49.90%		49.90%
Number of units acquired | apartment			269							269
Payments to acquire real estate			$ 117,000
Debt instrument, repaid, principal			95,000
Patina at Midtown | Apartment Building
Other Commitments [Line Items]
Gain on remeasurement of co-investment			$ 2,200
Hillsdale Garden Apartments | Subsequent Event
Other Commitments [Line Items]
Joint venture ownership percent	81.50%
Number of units | apartment	697
Proceeds from sale of real estate	$ 252,400