Significant Transactions During the Six Months Ended June 30, 2024 and Subsequent Events (Details)	1 Months Ended					3 Months Ended		6 Months Ended
	Jul. 31, 2024 USD ($) apartment	May 31, 2024 USD ($) apartment	Apr. 30, 2024 USD ($) apartment	Mar. 31, 2024 USD ($) apartment community	Aug. 31, 2022 USD ($) community	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)
Other Commitments [Line Items]
Gain on remeasurement of co-investment						$ 0	$ 0	$ 138,326,000	$ 0
Income (Loss) from Equity Method Investments						9,652,000	12,237,000	22,018,000	23,108,000
Proceeds from dispositions of co-investments		$ 10,300,000
Preferred return rate		12.00%
Subsequent Event
Other Commitments [Line Items]
Proceeds from debt repayment	$ 40,100,000
Essex Portfolio, L.P.
Other Commitments [Line Items]
Gain on remeasurement of co-investment						0	0	138,326,000	0
Income (Loss) from Equity Method Investments						$ 9,652,000	$ 12,237,000	$ 22,018,000	$ 23,108,000
Senior Notes
Other Commitments [Line Items]
Debt instrument, repaid, principal		$ 400,000,000
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				$ 350,000,000
Interest rate				5.50%
Debt instrument, debt offering price, percentage of principal				99.752%
Related Party
Other Commitments [Line Items]
Number of communities owned | community					3
Notes receivable					$ 11,200,000
Notes receivable, interest rate					9.50%
Related Party Bridge Loan On Property Acquired By BEX II | Related Party
Other Commitments [Line Items]
Notes receivable			$ 53,600,000	$ 53,600,000
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) [Member]
Notes receivable, interest rate			1.50%
Apartment Building | Regency Palm Court and Windsor Court
Other Commitments [Line Items]
Gain on remeasurement of co-investment				$ 138,300,000
BEXAEW LLC
Other Commitments [Line Items]
Number of units acquired | apartment				1,480
Payments to acquire real estate				$ 505,000,000
Debt instrument, repaid, principal				$ 219,900,000
Number of communities owned | community				4
Income (Loss) from Equity Method Investments				$ 1,500,000
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%
Patina at Midtown | Subsequent Event
Other Commitments [Line Items]
Debt instrument, repaid, principal	$ 95,000,000
Joint venture ownership percent	49.90%
Number of units | apartment	269
Total purchase price	$ 117,000,000
ARLO Apartments Located in Mountain View
Other Commitments [Line Items]
Number of units acquired | apartment		164
Payments to acquire real estate		$ 101,100,000
Apartment Homes Located in Sunnyvale, CA
Other Commitments [Line Items]
Number of units acquired | apartment			75
Commitment to fund preferred equity investment			$ 14,700,000
Debt instrument, repaid, principal			32,100,000
Repayments of secured debt			$ 46,600,000
Membership Interest in BEXAEW
Other Commitments [Line Items]
Number of units acquired | apartment				1,480
Membership Interest in BEXAEW | BEXAEW LLC
Other Commitments [Line Items]
Joint venture ownership percent				49.90%