EPLP - Condensed Consolidated Statements of Capital (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	$ 172,724	$ 125,487	$ 617,028	$ 509,613
Change in fair value of derivatives and amortization of swap settlements	(4,050)	(21,433)	(17,571)	(15,925)
Change in fair value of marketable debt securities, net	114		201
Issuance of common units under:
General partner’s stock based compensation, net	(41)	11,351	8,370	12,313
Sale of common stock by general partner, net	(179)	(467)	(280)	(580)
Changes in the redemption value of redeemable noncontrolling interest	3,176	(609)	1,103	(2,293)
Distributions to noncontrolling interest	(8,192)	(9,118)	(24,677)	(26,193)
Redemptions	(4,919)	(797)	(13,475)	(1,076)
Essex Portfolio, L.P.
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at period beginning	5,805,914	5,654,500	5,720,390	5,593,978
Net income	172,724	125,487	617,028	509,613
Reversal of unrealized gains upon the sale of marketable debt securities	(17)		(17)
Change in fair value of derivatives and amortization of swap settlements	(4,050)	(21,433)	(17,571)	(15,925)
Change in fair value of marketable debt securities, net	114		201
Issuance of common units under:
General partner’s stock based compensation, net	(41)	11,351	8,370	12,313
Sale of common stock by general partner, net	(179)	(467)	(280)	(580)
Equity based compensation costs	2,607	1,991	7,021	5,734
Changes in the redemption value of redeemable noncontrolling interest	3,176	(609)	1,103	(2,293)
Changes in noncontrolling interest from acquisition		24,930		24,930
Distributions to noncontrolling interest	(2,392)	(3,404)	(7,209)	(9,409)
Redemptions	(4,919)	(797)	(13,475)	(1,076)
Distributions declared	(171,410)	(163,189)	(514,034)	(488,925)
Balance at period end	$ 5,801,527	$ 5,628,360	$ 5,801,527	$ 5,628,360
Essex Portfolio, L.P. | Common Equity | General Partner
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at period beginning (in shares)	64,404	64,210	64,280	64,203
Balance at period beginning	$ 5,623,574	$ 5,442,762	$ 5,512,391	$ 5,389,190
Net income	164,621	$ 118,424	$ 589,093	$ 484,069
Issuance of common units under:
General partner’s stock based compensation, net (in shares)		51	49	58
General partner’s stock based compensation, net	(41)	$ 11,351	$ 8,370	$ 12,313
Sale of common stock by general partner, net	(179)	(467)	(280)	(580)
Equity based compensation costs	2,519	1,923	6,783	5,539
Changes in the redemption value of redeemable noncontrolling interest	3,016	$ (813)	$ 1,314	$ (2,436)
Redemptions (in shares)		(6)	(75)	(6)
Redemptions	(4,440)	$ (43)	$ 2,355	$ (292)
Distributions declared	$ (165,610)	$ (157,475)	$ (496,566)	$ (472,141)
Balance at period end (in shares)	64,404	64,267	64,404	64,267
Balance at period end	$ 5,623,460	$ 5,415,662	$ 5,623,460	$ 5,415,662
Essex Portfolio, L.P. | Common Equity | Limited Partners
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at period beginning (in shares)	2,256	2,259	2,331	2,259
Balance at period beginning	$ 64,809	$ 46,819	$ 73,418	$ 44,991
Net income	5,767	4,206	20,827	17,075
Issuance of common units under:
Equity based compensation costs	88	68	238	195
Changes in the redemption value of redeemable noncontrolling interest	(124)	$ 123	$ (434)	$ 25
Changes in noncontrolling interest from acquisition (in shares)		82		82
Changes in noncontrolling interest from acquisition		$ 24,930		$ 24,930
Redemptions (in shares)		9	75	9
Redemptions		$ (676)	$ (11,841)	$ (676)
Distributions declared	$ (5,800)	$ (5,714)	$ (17,468)	$ (16,784)
Balance at period end (in shares)	2,256	2,332	2,256	2,332
Balance at period end	$ 64,740	$ 69,756	$ 64,740	$ 69,756
Essex Portfolio, L.P. | Accumulated other comprehensive income, net
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at period beginning	15,995	44,154	29,429	38,646
Reversal of unrealized gains upon the sale of marketable debt securities	(17)		(17)
Change in fair value of derivatives and amortization of swap settlements	(4,050)	(21,433)	(17,571)	(15,925)
Change in fair value of marketable debt securities, net	114		201
Issuance of common units under:
Balance at period end	12,042	22,721	12,042	22,721
Essex Portfolio, L.P. | Noncontrolling interest
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at period beginning	101,536	120,765	105,152	121,151
Net income	2,336	2,857	7,108	8,469
Issuance of common units under:
Changes in the redemption value of redeemable noncontrolling interest	284	81	223	118
Distributions to noncontrolling interest	(2,392)	(3,404)	(7,209)	(9,409)
Redemptions	(479)	(78)	(3,989)	(108)
Balance at period end	$ 101,285	$ 120,221	$ 101,285	$ 120,221