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| 0000920522-18-000021-index.html | 2018-05-04 16:28:18 | |
| 0000920522-18-000021.txt | 2018-05-04 16:28:18 | |
 0000920522-18-000021-xbrl.zip | 234018 | 2018-05-04 16:28:18 |
| ess-20180331.xml | 1506060 | 2018-05-04 16:28:18 |
| ess-20180331.xsd | 56090 | 2018-05-04 16:28:18 |
| ess-20180331_cal.xml | 106499 | 2018-05-04 16:28:18 |
| ess-20180331_def.xml | 380418 | 2018-05-04 16:28:18 |
| ess-20180331_lab.xml | 738757 | 2018-05-04 16:28:18 |
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| ess-33118x10q.htm | 1438000 | 2018-05-04 16:28:18 |
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| ess-33118xex311.htm | 13000 | 2018-05-04 16:28:18 |
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| ess-33118xex321.htm | 6426 | 2018-05-04 16:28:18 |
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| ess-33118xex324.htm | 6749 | 2018-05-04 16:28:18 |
| FilingSummary.xml | 28135 | 2018-05-04 16:28:18 |
| Financial_Report.xlsx | 74404 | 2018-05-04 16:28:18 |
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| report.css | 2767 | 2018-05-04 16:28:18 |
| Show.js | 1410 | 2018-05-04 16:28:18 |