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Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2018 | Sep. 30, 2017
Cash paid for interest, capitalized | $ 13.3 | $ 10.0
Essex Portfolio, L.P. [Member] |  |
Cash paid for interest, capitalized | $ 13.3 | $ 10.0

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