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Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Cash paid for interest, capitalized | $ 4.2 | $ 3.3
Essex Portfolio, L.P. [Member] |  |
Cash paid for interest, capitalized | $ 4.2 | $ 3.3

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