Organization and Basis of Presentation - Schedule of Changes in Accumulated Other Comprehensive Income, Net by Component (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2026 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	$ 5,708,632
Balance at period end	5,601,356
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	6,047
Other comprehensive loss before reclassification	(782)
Amounts reclassified from accumulated other comprehensive income	899
Other comprehensive income (loss)	117
Balance at period end	6,164
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 loss before reclassification	(566)
Amounts reclassified from accumulated other comprehensive income	912
Other comprehensive income (loss)	346
Balance at period end	6,183
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 loss before reclassification	(216)
Amounts reclassified from accumulated other comprehensive income	(13)
Other comprehensive income (loss)	(229)
Balance at period end	(19)
Essex Portfolio, L.P. | Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	10,138
Other comprehensive loss before reclassification	(810)
Amounts reclassified from accumulated other comprehensive income	931
Other comprehensive income (loss)	121
Balance at period end	10,259
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 loss before reclassification	(586)
Amounts reclassified from accumulated other comprehensive income	944
Other comprehensive income (loss)	358
Balance at period end	10,279
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 loss before reclassification	(224)
Amounts reclassified from accumulated other comprehensive income	(13)
Other comprehensive income (loss)	(237)
Balance at period end	$ (20)