Organization and Basis of Presentation - Schedule of Changes in Accumulated Other Comprehensive Income, Net by Component (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2026 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	$ 5,708,632
Balance at period end	5,485,516
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	6,047
Other comprehensive income (loss) before reclassification	1,953
Amounts reclassified from accumulated other comprehensive income	1,124
Other comprehensive income (loss)	3,077
Balance at period end	9,124
Change in fair value of derivatives and amortization of swap settlements
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	5,837
Other comprehensive income (loss) before reclassification	2,235
Amounts reclassified from accumulated other comprehensive income	1,150
Other comprehensive income (loss)	3,385
Balance at period end	9,222
Unrealized gain (loss) on available for sale debt securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	210
Other comprehensive income (loss) before reclassification	(282)
Amounts reclassified from accumulated other comprehensive income	(26)
Other comprehensive income (loss)	(308)
Balance at period end	(98)
Essex Portfolio, L.P. | Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	10,138
Other comprehensive income (loss) before reclassification	2,018
Amounts reclassified from accumulated other comprehensive income	1,164
Other comprehensive income (loss)	3,182
Balance at period end	13,320
Essex Portfolio, L.P. | Change in fair value of derivatives and amortization of swap settlements
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	9,921
Other comprehensive income (loss) before reclassification	2,311
Amounts reclassified from accumulated other comprehensive income	1,190
Other comprehensive income (loss)	3,501
Balance at period end	13,422
Essex Portfolio, L.P. | Unrealized gain (loss) on available for sale debt securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	217
Other comprehensive income (loss) before reclassification	(293)
Amounts reclassified from accumulated other comprehensive income	(26)
Other comprehensive income (loss)	(319)
Balance at period end	$ (102)