Organization and Basis of Presentation - Schedule of Changes in Accumulated Other Comprehensive Income, Net by Component (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2025 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	$ 5,720,390
Balance at period end	5,805,914
Accumulated Other Comprehensive Loss, Net
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	24,655
Other comprehensive loss before reclassification	(15,231)
Amounts reclassified from accumulated other comprehensive income	2,251
Other comprehensive loss	(12,980)
Balance at period end	11,675
Change in fair value and amortization of swap settlements
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	24,655
Other comprehensive loss before reclassification	(15,315)
Amounts reclassified from accumulated other comprehensive income	2,251
Other comprehensive loss	(13,064)
Balance at period end	11,591
Unrealized gain on available for sale debt securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	0
Other comprehensive loss before reclassification	84
Amounts reclassified from accumulated other comprehensive income	0
Other comprehensive loss	84
Balance at period end	84
Essex Portfolio, L.P. | Accumulated Other Comprehensive Loss, Net
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	29,429
Other comprehensive loss before reclassification	(15,765)
Amounts reclassified from accumulated other comprehensive income	2,331
Other comprehensive loss	(13,434)
Balance at period end	15,995
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	29,429
Other comprehensive loss before reclassification	(15,852)
Amounts reclassified from accumulated other comprehensive income	2,331
Other comprehensive loss	(13,521)
Balance at period end	15,908
Essex Portfolio, L.P. | Unrealized gain on available for sale debt securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at period beginning	0
Other comprehensive loss before reclassification	87
Amounts reclassified from accumulated other comprehensive income	0
Other comprehensive loss	87
Balance at period end	$ 87