EPLP - Condensed Consolidated Statements of Capital for the three and nine months ended September 30, 2023 and 2022 (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	$ 93,009	$ 98,700	$ 360,359	$ 238,765
Change in fair value of derivatives and amortization of swap settlements	4,113	26,189	9,205	58,084
Change in fair value of marketable debt securities, net		(92)		204
Issuance of common units under:
Sale of common stock by general partner, net	(106)	(107)	(231)	(314)
Retirement of common units, net		(97,121)	(95,657)	(157,951)
Changes in the redemption value of redeemable noncontrolling interest	1,395	3,727	(2,810)	4,950
Contributions from noncontrolling interest				125
Distributions to noncontrolling interest	(7,973)	(7,748)	(24,006)	(22,989)
Redemptions	0	(8,568)	(609)	(10,929)
Noncontrolling interest
Issuance of common units under:
Contributions from noncontrolling interest				125
Essex Portfolio, L.P.
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at period beginning	5,762,005	6,006,585	5,895,116	6,176,508
Net income	93,009	98,700	360,359	238,765
Change in fair value of derivatives and amortization of swap settlements	4,113	26,189	9,205	58,084
Change in fair value of marketable debt securities, net		(92)		204
Issuance of common units under:
General partner's stock based compensation, net		155	0	17,194
Sale of common stock by general partner, net	(106)	(107)	(231)	(314)
Equity based compensation costs	2,289	1,957	9,935	7,082
Retirement of common units, net		(97,121)	(95,657)	(157,951)
Changes in the redemption value of redeemable noncontrolling interest	1,395	3,727	(2,810)	4,950
Contributions from noncontrolling interest				125
Distributions to noncontrolling interest	(2,754)	(2,747)	(8,344)	(7,965)
Redemptions	0	(8,568)	(609)	(10,929)
Distributions declared	(153,504)	(147,481)	(460,517)	(444,556)
Balance at period end	$ 5,706,447	$ 5,881,197	$ 5,706,447	$ 5,881,197
Essex Portfolio, L.P. | Common Equity | General Partner
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at period beginning (in shares)	64,183	65,124	64,605	65,248
Balance at period beginning	$ 5,533,893	$ 5,802,293	$ 5,669,906	$ 5,999,155
Net income	87,282	$ 92,842	$ 340,434	$ 223,150
Issuance of common units under:
General partner's stock based compensation, net (in shares)		1	3	88
General partner's stock based compensation, net		$ 155		$ 17,194
Sale of common stock by general partner, net	(106)	(107)	$ (231)	(314)
Equity based compensation costs	2,211	$ 1,891	$ 9,598	$ 6,843
Retirement of common units, net (in shares)		(372)	(437)	(591)
Retirement of common units, net		$ (97,121)	$ (95,657)	$ (157,951)
Changes in the redemption value of redeemable noncontrolling interest	1,317	3,195	(2,770)	4,246
Redemptions	$ 13	(8,005)	$ (100)	$ (10,128)
Redemptions (in shares)	2		14	8
Distributions declared	$ (148,285)	$ (142,480)	$ (444,855)	$ (429,532)
Balance at period end (in shares)	64,185	64,753	64,185	64,753
Balance at period end	$ 5,476,325	$ 5,652,663	$ 5,476,325	$ 5,652,663
Essex Portfolio, L.P. | Common Equity | Limited Partners
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at period beginning (in shares)	2,260	2,273	2,272	2,282
Balance at period beginning	$ 49,704	$ 51,233	$ 51,454	$ 56,502
Net income	3,072	3,247	11,982	7,800
Issuance of common units under:
Equity based compensation costs	78	66	337	239
Changes in the redemption value of redeemable noncontrolling interest	90	$ 172	(42)	294
Redemptions	$ (11)		$ (355)	$ (94)
Redemptions (in shares)	(1)	(1)	(13)	(10)
Distributions declared	$ (5,219)	$ (5,001)	$ (15,662)	$ (15,024)
Balance at period end (in shares)	2,259	2,272	2,259	2,272
Balance at period end	$ 47,714	$ 49,717	$ 47,714	$ 49,717
Essex Portfolio, L.P. | Accumulated other comprehensive income (loss), net
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at period beginning	57,102	30,387	52,010	(1,804)
Change in fair value of derivatives and amortization of swap settlements	4,113	26,189	9,205	58,084
Change in fair value of marketable debt securities, net		(92)		204
Issuance of common units under:
Balance at period end	61,215	56,484	61,215	56,484
Essex Portfolio, L.P. | Noncontrolling interest
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at period beginning	121,306	122,672	121,746	122,655
Net income	2,655	2,611	7,943	7,815
Issuance of common units under:
Changes in the redemption value of redeemable noncontrolling interest	(12)	360	2	410
Distributions to noncontrolling interest	(2,754)	(2,747)	(8,344)	(7,965)
Redemptions	(2)	(563)	(154)	(707)
Balance at period end	$ 121,193	$ 122,333	$ 121,193	$ 122,333