Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000920522-16-000097-index-headers.html | 2016-02-26 16:02:10 | |
| 0000920522-16-000097-index.html | 2016-02-26 16:02:10 | |
| 0000920522-16-000097.txt | 2016-02-26 16:02:10 | |
 0000920522-16-000097-xbrl.zip | 653248 | 2016-02-26 16:02:10 |
| ess-123115x10k.htm | 5867280 | 2016-02-26 16:02:10 |
| ess-123115xex1030.htm | 120573 | 2016-02-26 16:02:10 |
| ess-123115xex121.htm | 193579 | 2016-02-26 16:02:10 |
| ess-123115xex211.htm | 112813 | 2016-02-26 16:02:10 |
| ess-123115xex231.htm | 3319 | 2016-02-26 16:02:10 |
| ess-123115xex232.htm | 2879 | 2016-02-26 16:02:10 |
| ess-123115xex311.htm | 13548 | 2016-02-26 16:02:10 |
| ess-123115xex312.htm | 13544 | 2016-02-26 16:02:10 |
| ess-123115xex313.htm | 14009 | 2016-02-26 16:02:10 |
| ess-123115xex314.htm | 13908 | 2016-02-26 16:02:10 |
| ess-123115xex321.htm | 6397 | 2016-02-26 16:02:10 |
| ess-123115xex322.htm | 6522 | 2016-02-26 16:02:10 |
| ess-123115xex323.htm | 7240 | 2016-02-26 16:02:10 |
| ess-123115xex324.htm | 7214 | 2016-02-26 16:02:10 |
 ess-123115x_chartx17848a01.jpg | 67115 | 2016-02-26 16:02:10 |
| ess-20151231.xml | 7048948 | 2016-02-26 16:02:10 |
| ess-20151231.xsd | 165431 | 2016-02-26 16:02:10 |
| ess-20151231_cal.xml | 143431 | 2016-02-26 16:02:10 |
| ess-20151231_def.xml | 771481 | 2016-02-26 16:02:10 |
| ess-20151231_lab.xml | 1765864 | 2016-02-26 16:02:10 |
| ess-20151231_pre.xml | 947647 | 2016-02-26 16:02:10 |
| FilingSummary.xml | 40507 | 2016-02-26 16:02:10 |
| Financial_Report.xlsx | 198216 | 2016-02-26 16:02:10 |
| R1.htm | 32430 | 2016-02-26 16:02:10 |
| R10.htm | 191286 | 2016-02-26 16:02:10 |
| R11.htm | 139413 | 2016-02-26 16:02:10 |
| R12.htm | 15567 | 2016-02-26 16:02:10 |
| R13.htm | 19408 | 2016-02-26 16:02:10 |
| R14.htm | 22924 | 2016-02-26 16:02:10 |
| R15.htm | 109088 | 2016-02-26 16:02:10 |
| R16.htm | 29665 | 2016-02-26 16:02:10 |
| R17.htm | 17424 | 2016-02-26 16:02:10 |
| R18.htm | 15140 | 2016-02-26 16:02:10 |
| R19.htm | 17978 | 2016-02-26 16:02:10 |
| R2.htm | 122685 | 2016-02-26 16:02:10 |
| R20.htm | 163287 | 2016-02-26 16:02:10 |
| R21.htm | 211562 | 2016-02-26 16:02:10 |
| R22.htm | 95798 | 2016-02-26 16:02:10 |
| R23.htm | 7454 | 2016-02-26 16:02:10 |
| R24.htm | 15704 | 2016-02-26 16:02:10 |
| R25.htm | 7896 | 2016-02-26 16:02:10 |
| R26.htm | 182688 | 2016-02-26 16:02:10 |
| R27.htm | 1322821 | 2016-02-26 16:02:10 |
| R28.htm | 90031 | 2016-02-26 16:02:10 |
| R29.htm | 139309 | 2016-02-26 16:02:10 |
| R3.htm | 20989 | 2016-02-26 16:02:10 |
| R30.htm | 137605 | 2016-02-26 16:02:10 |
| R31.htm | 14962 | 2016-02-26 16:02:10 |
| R32.htm | 33532 | 2016-02-26 16:02:10 |
| R33.htm | 118581 | 2016-02-26 16:02:10 |
| R34.htm | 64659 | 2016-02-26 16:02:10 |
| R35.htm | 12501 | 2016-02-26 16:02:10 |
| R36.htm | 161088 | 2016-02-26 16:02:10 |
| R37.htm | 195091 | 2016-02-26 16:02:10 |
| R38.htm | 91449 | 2016-02-26 16:02:10 |
| R39.htm | 183536 | 2016-02-26 16:02:10 |
| R4.htm | 100828 | 2016-02-26 16:02:10 |
| R40.htm | 38667 | 2016-02-26 16:02:10 |
| R41.htm | 186051 | 2016-02-26 16:02:10 |
| R42.htm | 46025 | 2016-02-26 16:02:10 |
| R43.htm | 49378 | 2016-02-26 16:02:10 |
| R44.htm | 19222 | 2016-02-26 16:02:10 |
| R45.htm | 109846 | 2016-02-26 16:02:10 |
| R46.htm | 34726 | 2016-02-26 16:02:10 |
| R47.htm | 54669 | 2016-02-26 16:02:10 |
| R48.htm | 16064 | 2016-02-26 16:02:10 |
| R49.htm | 66543 | 2016-02-26 16:02:10 |
| R5.htm | 29128 | 2016-02-26 16:02:10 |
| R50.htm | 38107 | 2016-02-26 16:02:10 |
| R51.htm | 20920 | 2016-02-26 16:02:10 |
| R52.htm | 24202 | 2016-02-26 16:02:10 |
| R53.htm | 31122 | 2016-02-26 16:02:10 |
| R54.htm | 22640 | 2016-02-26 16:02:10 |
| R55.htm | 132057 | 2016-02-26 16:02:10 |
| R56.htm | 47866 | 2016-02-26 16:02:10 |
| R57.htm | 22678 | 2016-02-26 16:02:10 |
| R58.htm | 35893 | 2016-02-26 16:02:10 |
| R59.htm | 20752 | 2016-02-26 16:02:10 |
| R6.htm | 89285 | 2016-02-26 16:02:10 |
| R60.htm | 49778 | 2016-02-26 16:02:10 |
| R61.htm | 88777 | 2016-02-26 16:02:10 |
| R62.htm | 113549 | 2016-02-26 16:02:10 |
| R63.htm | 14138 | 2016-02-26 16:02:10 |
| R64.htm | 32491 | 2016-02-26 16:02:10 |
| R65.htm | 32504 | 2016-02-26 16:02:10 |
| R66.htm | 62612 | 2016-02-26 16:02:10 |
| R67.htm | 89598 | 2016-02-26 16:02:10 |
| R68.htm | 7982 | 2016-02-26 16:02:10 |
| R69.htm | 26813 | 2016-02-26 16:02:10 |
| R7.htm | 124221 | 2016-02-26 16:02:10 |
| R70.htm | 38933 | 2016-02-26 16:02:10 |
| R71.htm | 39557 | 2016-02-26 16:02:10 |
| R72.htm | 2935070 | 2016-02-26 16:02:10 |
| R8.htm | 166769 | 2016-02-26 16:02:10 |
| R9.htm | 14336 | 2016-02-26 16:02:10 |
| report.css | 2767 | 2016-02-26 16:02:10 |
| Show.js | 1410 | 2016-02-26 16:02:10 |