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Organization and Basis of Presentation - Accumulated Other Comprehensive Loss - Partnership (Details) $ in Thousands | 9 Months Ended
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Sep. 30, 2016 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |
Balance at period beginning | $ 6,337,023
Balance at period end | 6,183,902
Essex Portfolio, L.P. [Member] | AOCI Including Portion Attributable to Noncontrolling Interest [Member] |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |
Balance at period beginning | (39,598)
Other comprehensive (loss) income before reclassification | (3,399)
Amounts reclassified from accumulated other comprehensive loss | 5,380
Other comprehensive income (loss) | 1,981
Balance at period end | (37,617)
Essex Portfolio, L.P. [Member] | Change in fair value and amortization of swap settlements |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |
Balance at period beginning | (46,087)
Other comprehensive (loss) income before reclassification | (4,775)
Amounts reclassified from accumulated other comprehensive loss | 8,256
Other comprehensive income (loss) | 3,481
Balance at period end | (42,606)
Essex Portfolio, L.P. [Member] | Unrealized gains on available for sale securities |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |
Balance at period beginning | 6,489
Other comprehensive (loss) income before reclassification | 1,376
Amounts reclassified from accumulated other comprehensive loss | (2,876)
Other comprehensive income (loss) | (1,500)
Balance at period end | $ 4,989

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