Organization and Basis of Presentation - Accumulated Other Comprehensive Income (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	$ 5,593,978
Balance at period end	5,654,500
Accumulated Other Comprehensive Loss, Net
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	33,556
Balance at period end	38,877
Change in fair value and amortization of swap settlements
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	33,556
Other comprehensive income before reclassification	5,297
Amounts reclassified from accumulated other comprehensive income	24
Other comprehensive income	5,321
Balance at period end	38,877
Essex Portfolio, L.P. | Change in fair value and amortization of swap settlements
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	38,646
Other comprehensive income before reclassification	5,483
Amounts reclassified from accumulated other comprehensive income	25
Other comprehensive income	5,508
Balance at period end	$ 44,154