Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001144204-14-019501-index-headers.html | 2014-03-31 16:46:40 | |
| 0001144204-14-019501-index.html | 2014-03-31 16:46:40 | |
| 0001144204-14-019501.txt | 2014-03-31 16:46:40 | |
 0001144204-14-019501-xbrl.zip | 142302 | 2014-03-31 16:46:40 |
| ers-20131231.xml | 1154304 | 2014-03-31 16:46:40 |
| ers-20131231.xsd | 67745 | 2014-03-31 16:46:40 |
| ers-20131231_cal.xml | 60276 | 2014-03-31 16:46:40 |
| ers-20131231_def.xml | 295958 | 2014-03-31 16:46:40 |
| ers-20131231_lab.xml | 401718 | 2014-03-31 16:46:40 |
| ers-20131231_pre.xml | 373876 | 2014-03-31 16:46:40 |
| FilingSummary.xml | 33685 | 2014-03-31 16:46:40 |
| Financial_Report.xls | 1061269 | 2014-03-31 16:46:40 |
| Financial_Report.xlsx | 152399 | 2014-03-31 16:46:40 |
| R1.htm | 39425 | 2014-03-31 16:46:40 |
| R10.htm | 77873 | 2014-03-31 16:46:40 |
| R11.htm | 7278 | 2014-03-31 16:46:40 |
| R12.htm | 26351 | 2014-03-31 16:46:40 |
| R13.htm | 66322 | 2014-03-31 16:46:40 |
| R14.htm | 14736 | 2014-03-31 16:46:40 |
| R15.htm | 7097 | 2014-03-31 16:46:40 |
| R16.htm | 11263 | 2014-03-31 16:46:40 |
| R17.htm | 35129 | 2014-03-31 16:46:40 |
| R18.htm | 44887 | 2014-03-31 16:46:40 |
| R19.htm | 6721 | 2014-03-31 16:46:40 |
| R2.htm | 119734 | 2014-03-31 16:46:40 |
| R20.htm | 45959 | 2014-03-31 16:46:40 |
| R21.htm | 104558 | 2014-03-31 16:46:40 |
| R22.htm | 13415 | 2014-03-31 16:46:40 |
| R23.htm | 35918 | 2014-03-31 16:46:40 |
| R24.htm | 7319 | 2014-03-31 16:46:40 |
| R25.htm | 23889 | 2014-03-31 16:46:40 |
| R26.htm | 14274 | 2014-03-31 16:46:40 |
| R27.htm | 122337 | 2014-03-31 16:46:40 |
| R28.htm | 48348 | 2014-03-31 16:46:40 |
| R29.htm | 24540 | 2014-03-31 16:46:40 |
| R3.htm | 23531 | 2014-03-31 16:46:40 |
| R30.htm | 60165 | 2014-03-31 16:46:40 |
| R31.htm | 13410 | 2014-03-31 16:46:40 |
| R32.htm | 25547 | 2014-03-31 16:46:40 |
| R33.htm | 40088 | 2014-03-31 16:46:40 |
| R34.htm | 51683 | 2014-03-31 16:46:40 |
| R35.htm | 108260 | 2014-03-31 16:46:40 |
| R36.htm | 10320 | 2014-03-31 16:46:40 |
| R37.htm | 33570 | 2014-03-31 16:46:40 |
| R38.htm | 20075 | 2014-03-31 16:46:40 |
| R39.htm | 10433 | 2014-03-31 16:46:40 |
| R4.htm | 52297 | 2014-03-31 16:46:40 |
| R40.htm | 9827 | 2014-03-31 16:46:40 |
| R41.htm | 10586 | 2014-03-31 16:46:40 |
| R42.htm | 6021 | 2014-03-31 16:46:40 |
| R43.htm | 19727 | 2014-03-31 16:46:40 |
| R44.htm | 5487 | 2014-03-31 16:46:40 |
| R45.htm | 12544 | 2014-03-31 16:46:40 |
| R46.htm | 5884 | 2014-03-31 16:46:40 |
| R47.htm | 12173 | 2014-03-31 16:46:40 |
| R48.htm | 10329 | 2014-03-31 16:46:40 |
| R49.htm | 12831 | 2014-03-31 16:46:40 |
| R5.htm | 30691 | 2014-03-31 16:46:40 |
| R50.htm | 9424 | 2014-03-31 16:46:40 |
| R51.htm | 32595 | 2014-03-31 16:46:40 |
| R52.htm | 16073 | 2014-03-31 16:46:40 |
| R53.htm | 57443 | 2014-03-31 16:46:40 |
| R54.htm | 28384 | 2014-03-31 16:46:40 |
| R55.htm | 5963 | 2014-03-31 16:46:40 |
| R56.htm | 15737 | 2014-03-31 16:46:40 |
| R57.htm | 57733 | 2014-03-31 16:46:40 |
| R58.htm | 12905 | 2014-03-31 16:46:40 |
| R59.htm | 11159 | 2014-03-31 16:46:40 |
| R6.htm | 116391 | 2014-03-31 16:46:40 |
| R60.htm | 11171 | 2014-03-31 16:46:40 |
| R61.htm | 39377 | 2014-03-31 16:46:40 |
| R62.htm | 20972 | 2014-03-31 16:46:40 |
| R63.htm | 54800 | 2014-03-31 16:46:40 |
| R64.htm | 11340 | 2014-03-31 16:46:40 |
| R65.htm | 22236 | 2014-03-31 16:46:40 |
| R66.htm | 8310 | 2014-03-31 16:46:40 |
| R67.htm | 12574 | 2014-03-31 16:46:40 |
| R68.htm | 42248 | 2014-03-31 16:46:40 |
| R69.htm | 4562 | 2014-03-31 16:46:40 |
| R7.htm | 34926 | 2014-03-31 16:46:40 |
| R70.htm | 8409 | 2014-03-31 16:46:40 |
| R71.htm | 11072 | 2014-03-31 16:46:40 |
| R72.htm | 11633 | 2014-03-31 16:46:40 |
| R73.htm | 7525 | 2014-03-31 16:46:40 |
| R8.htm | 8232 | 2014-03-31 16:46:40 |
| R9.htm | 10084 | 2014-03-31 16:46:40 |
| report.css | 2740 | 2014-03-31 16:46:40 |
| Show.js | 1410 | 2014-03-31 16:46:40 |
| v371395_10k.htm | 1340294 | 2014-03-31 16:46:40 |
| v371395_ex31-1.htm | 10161 | 2014-03-31 16:46:40 |
| v371395_ex31-2.htm | 10527 | 2014-03-31 16:46:40 |
| v371395_ex32-1.htm | 5236 | 2014-03-31 16:46:40 |
| v371395_ex32-2.htm | 5120 | 2014-03-31 16:46:40 |