EPLP - Condensed Consolidated Statements of Capital (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	$ 66,929	$ 231,526	$ 179,137	$ 444,304
Change in fair value of derivatives and amortization of swap settlements	3,143	(4,149)	3,501	(13,521)
Change in fair value of marketable debt securities, net	(69)	70	(293)	87
Issuance of common units under:
General partner’s stock based compensation, net	312	2,902	93	8,411
Sale of common stock, net	(59)	(101)	(59)	(101)
Retirement of common stock, net	(11,702)		(61,915)
Changes in the redemption value and redemptions of redeemable noncontrolling interest	(1,585)	1,454	890	(2,073)
Distributions to noncontrolling interest	(8,000)	(8,185)	(16,017)	(16,485)
Redemptions	(1,562)	0	(1,562)	(8,556)
Essex Portfolio, L.P.
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at period beginning	5,601,356	5,745,575	5,708,632	5,720,390
Net income	66,929	231,526	179,137	444,304
Reversal of unrealized gains upon the sale of marketable debt securities, net	(13)		(26)
Change in fair value of derivatives and amortization of swap settlements	3,143	(4,149)	3,501	(13,521)
Change in fair value of marketable debt securities, net	(69)	70	(293)	87
Issuance of common units under:
General partner’s stock based compensation, net	312	2,902	93	8,411
Sale of common stock, net	(59)	(101)	(59)	(101)
Equity based compensation costs	3,240	2,359	6,190	4,414
Retirement of common stock, net	(11,702)		(61,915)
Changes in the redemption value and redemptions of redeemable noncontrolling interest	(1,585)	1,454	890	(2,073)
Changes in noncontrolling interest from acquisition			0
Distributions to noncontrolling interest	(2,345)	(2,386)	(4,704)	(4,817)
Redemptions	(1,562)	0	(1,562)	(8,556)
Distributions declared	(172,129)	(171,336)	(344,368)	(342,624)
Balance at period end	$ 5,485,516	$ 5,805,914	$ 5,485,516	$ 5,805,914
Essex Portfolio, L.P. | Common Equity | General Partner
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at period beginning (in shares)	64,310	64,358	64,442	64,280
Balance at period beginning	$ 5,429,423	$ 5,554,381	$ 5,535,325	$ 5,512,391
Net income	$ 62,462	$ 221,362	$ 168,648	$ 424,472
Issuance of common units under:
General partner’s stock based compensation, net (in shares)	6	19	13	49
General partner’s stock based compensation, net	$ 312	$ 2,902	$ 93	$ 8,411
Sale of common stock, net	(59)	(101)	(59)	(101)
Equity based compensation costs	$ 3,135	2,279	$ 5,986	4,264
Retirement of common stock, net (in shares)	(48)		(254)
Retirement of common stock, net	$ (11,702)		$ (61,915)
Changes in the redemption value and redemptions of redeemable noncontrolling interest (in shares)			67
Changes in the redemption value and redemptions of redeemable noncontrolling interest	(1,712)	$ 1,473	$ 612	$ (1,702)
Changes in noncontrolling interest from acquisition			$ (250)
Redemptions (in shares)		27	0	75
Redemptions	(1,436)	$ 6,815	$ (1,436)	$ 6,795
Distributions declared	$ (166,474)	$ (165,537)	$ (333,055)	$ (330,956)
Balance at period end (in shares)	64,268	64,404	64,268	64,404
Balance at period end	$ 5,313,949	$ 5,623,574	$ 5,313,949	$ 5,623,574
Essex Portfolio, L.P. | Common Equity | Limited Partners
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at period beginning (in shares)	2,184	2,283	2,250	2,331
Balance at period beginning	$ 60,396	$ 69,653	$ 61,876	$ 73,418
Net income	2,123	7,781	5,792	15,060
Issuance of common units under:
Equity based compensation costs	105	80	$ 204	150
Changes in the redemption value and redemptions of redeemable noncontrolling interest (in shares)			(67)
Changes in the redemption value and redemptions of redeemable noncontrolling interest	50	$ (91)	$ 210	$ (310)
Changes in noncontrolling interest from acquisition (in shares)			1
Changes in noncontrolling interest from acquisition			$ 250
Redemptions (in shares)		(27)	0	(75)
Redemptions	(21)	$ (6,815)	$ (21)	$ (11,841)
Distributions declared	$ (5,655)	$ (5,799)	$ (11,313)	$ (11,668)
Balance at period end (in shares)	2,184	2,256	2,184	2,256
Balance at period end	$ 56,998	$ 64,809	$ 56,998	$ 64,809
Essex Portfolio, L.P. | Accumulated other comprehensive income, net
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at period beginning	10,259	20,074	10,138	29,429
Reversal of unrealized gains upon the sale of marketable debt securities, net	(13)		(26)
Change in fair value of derivatives and amortization of swap settlements	3,143	(4,149)	3,501	(13,521)
Change in fair value of marketable debt securities, net	(69)	70	(293)	87
Issuance of common units under:
Balance at period end	13,320	15,995	13,320	15,995
Essex Portfolio, L.P. | Noncontrolling interest
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at period beginning	101,278	101,467	101,293	105,152
Net income	2,344	2,383	4,697	4,772
Issuance of common units under:
Changes in the redemption value and redemptions of redeemable noncontrolling interest	77	72	68	(61)
Distributions to noncontrolling interest	(2,345)	(2,386)	(4,704)	(4,817)
Redemptions	(105)	0	(105)	(3,510)
Balance at period end	$ 101,249	$ 101,536	$ 101,249	$ 101,536