Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-16-663358-index-headers.html | 2016-07-29 08:00:13 | |
| 0001193125-16-663358-index.html | 2016-07-29 08:00:13 | |
| 0001193125-16-663358.txt | 2016-07-29 08:00:13 | |
 0001193125-16-663358-xbrl.zip | 236196 | 2016-07-29 08:00:13 |
| d224345d10q.htm | 1287999 | 2016-07-29 08:00:13 |
| d224345dex101.htm | 41309 | 2016-07-29 08:00:13 |
| d224345dex102.htm | 6847 | 2016-07-29 08:00:13 |
| d224345dex311.htm | 8448 | 2016-07-29 08:00:13 |
| d224345dex312.htm | 8433 | 2016-07-29 08:00:13 |
| d224345dex321.htm | 3099 | 2016-07-29 08:00:13 |
| d224345dex322.htm | 3109 | 2016-07-29 08:00:13 |
| esi-20160630.xml | 1822906 | 2016-07-29 08:00:13 |
| esi-20160630.xsd | 86497 | 2016-07-29 08:00:13 |
| esi-20160630_cal.xml | 100998 | 2016-07-29 08:00:13 |
| esi-20160630_def.xml | 274924 | 2016-07-29 08:00:13 |
| esi-20160630_lab.xml | 556425 | 2016-07-29 08:00:13 |
| esi-20160630_pre.xml | 467076 | 2016-07-29 08:00:13 |
| FilingSummary.xml | 51610 | 2016-07-29 08:00:13 |
| Financial_Report.xlsx | 113841 | 2016-07-29 08:00:13 |
| R1.htm | 21363 | 2016-07-29 08:00:13 |
| R10.htm | 19500 | 2016-07-29 08:00:13 |
| R11.htm | 52633 | 2016-07-29 08:00:13 |
| R12.htm | 51275 | 2016-07-29 08:00:13 |
| R13.htm | 116352 | 2016-07-29 08:00:13 |
| R14.htm | 83829 | 2016-07-29 08:00:13 |
| R15.htm | 64552 | 2016-07-29 08:00:13 |
| R16.htm | 66472 | 2016-07-29 08:00:13 |
| R17.htm | 14611 | 2016-07-29 08:00:13 |
| R18.htm | 31417 | 2016-07-29 08:00:13 |
| R19.htm | 279815 | 2016-07-29 08:00:13 |
| R2.htm | 95574 | 2016-07-29 08:00:13 |
| R20.htm | 37692 | 2016-07-29 08:00:13 |
| R21.htm | 37524 | 2016-07-29 08:00:13 |
| R22.htm | 55529 | 2016-07-29 08:00:13 |
| R23.htm | 70572 | 2016-07-29 08:00:13 |
| R24.htm | 63126 | 2016-07-29 08:00:13 |
| R25.htm | 58227 | 2016-07-29 08:00:13 |
| R26.htm | 45137 | 2016-07-29 08:00:13 |
| R27.htm | 12880 | 2016-07-29 08:00:13 |
| R28.htm | 33514 | 2016-07-29 08:00:13 |
| R29.htm | 48882 | 2016-07-29 08:00:13 |
| R3.htm | 17403 | 2016-07-29 08:00:13 |
| R30.htm | 28457 | 2016-07-29 08:00:13 |
| R31.htm | 26668 | 2016-07-29 08:00:13 |
| R32.htm | 59056 | 2016-07-29 08:00:13 |
| R33.htm | 13208 | 2016-07-29 08:00:13 |
| R34.htm | 9610 | 2016-07-29 08:00:13 |
| R35.htm | 63509 | 2016-07-29 08:00:13 |
| R36.htm | 17128 | 2016-07-29 08:00:13 |
| R37.htm | 12322 | 2016-07-29 08:00:13 |
| R38.htm | 24056 | 2016-07-29 08:00:13 |
| R39.htm | 27510 | 2016-07-29 08:00:13 |
| R4.htm | 50558 | 2016-07-29 08:00:13 |
| R40.htm | 6669 | 2016-07-29 08:00:13 |
| R41.htm | 19934 | 2016-07-29 08:00:13 |
| R42.htm | 7379 | 2016-07-29 08:00:13 |
| R43.htm | 30539 | 2016-07-29 08:00:13 |
| R44.htm | 6653 | 2016-07-29 08:00:13 |
| R45.htm | 12871 | 2016-07-29 08:00:13 |
| R46.htm | 19916 | 2016-07-29 08:00:13 |
| R47.htm | 13799 | 2016-07-29 08:00:13 |
| R48.htm | 10187 | 2016-07-29 08:00:13 |
| R49.htm | 17327 | 2016-07-29 08:00:13 |
| R5.htm | 20248 | 2016-07-29 08:00:13 |
| R50.htm | 23378 | 2016-07-29 08:00:13 |
| R51.htm | 22829 | 2016-07-29 08:00:13 |
| R52.htm | 5797 | 2016-07-29 08:00:13 |
| R53.htm | 24682 | 2016-07-29 08:00:13 |
| R54.htm | 5665 | 2016-07-29 08:00:13 |
| R55.htm | 12533 | 2016-07-29 08:00:13 |
| R56.htm | 23028 | 2016-07-29 08:00:13 |
| R57.htm | 50093 | 2016-07-29 08:00:13 |
| R58.htm | 16348 | 2016-07-29 08:00:13 |
| R59.htm | 9207 | 2016-07-29 08:00:13 |
| R6.htm | 8142 | 2016-07-29 08:00:13 |
| R60.htm | 6401 | 2016-07-29 08:00:13 |
| R61.htm | 46886 | 2016-07-29 08:00:13 |
| R62.htm | 17310 | 2016-07-29 08:00:13 |
| R63.htm | 11052 | 2016-07-29 08:00:13 |
| R64.htm | 10553 | 2016-07-29 08:00:13 |
| R65.htm | 5779 | 2016-07-29 08:00:13 |
| R66.htm | 14724 | 2016-07-29 08:00:13 |
| R67.htm | 15558 | 2016-07-29 08:00:13 |
| R68.htm | 30246 | 2016-07-29 08:00:13 |
| R69.htm | 10423 | 2016-07-29 08:00:13 |
| R7.htm | 76573 | 2016-07-29 08:00:13 |
| R70.htm | 209275 | 2016-07-29 08:00:13 |
| R71.htm | 9202 | 2016-07-29 08:00:13 |
| R72.htm | 10056 | 2016-07-29 08:00:13 |
| R73.htm | 19755 | 2016-07-29 08:00:13 |
| R74.htm | 20279 | 2016-07-29 08:00:13 |
| R75.htm | 10061 | 2016-07-29 08:00:13 |
| R76.htm | 51297 | 2016-07-29 08:00:13 |
| R8.htm | 49416 | 2016-07-29 08:00:13 |
| R9.htm | 14655 | 2016-07-29 08:00:13 |
| report.css | 2767 | 2016-07-29 08:00:13 |
| Show.js | 1410 | 2016-07-29 08:00:13 |