Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000046619-20-000071-index-headers.html | 2020-12-14 17:13:33 | |
| 0000046619-20-000071-index.html | 2020-12-14 17:13:33 | |
| 0000046619-20-000071.txt | 2020-12-14 17:13:33 | |
 0000046619-20-000071-xbrl.zip | 36049 | 2020-12-14 17:13:33 |
| a12142020ex101creditag.htm | 154010 | 2020-12-14 17:13:33 |
| a12142020ex991pressrel.htm | 10190 | 2020-12-14 17:13:33 |
| FilingSummary.xml | 2496 | 2020-12-14 17:13:33 |
| Financial_Report.xlsx | 6184 | 2020-12-14 17:13:33 |
| hei-20201211.htm | 42445 | 2020-12-14 17:13:33 |
| hei-20201211.xsd | 3560 | 2020-12-14 17:13:33 |
| hei-20201211_cal.xml | 1134 | 2020-12-14 17:13:33 |
| hei-20201211_def.xml | 19742 | 2020-12-14 17:13:33 |
| hei-20201211_htm.xml | 14088 | 2020-12-14 17:13:33 |
| hei-20201211_lab.xml | 36337 | 2020-12-14 17:13:33 |
| hei-20201211_pre.xml | 20053 | 2020-12-14 17:13:33 |
| MetaLinks.json | 27033 | 2020-12-14 17:13:33 |
| R1.htm | 14772 | 2020-12-14 17:13:33 |
| R2.htm | 30693 | 2020-12-14 17:13:33 |
| report.css | 2767 | 2020-12-14 17:13:33 |
| Show.js | 1085 | 2020-12-14 17:13:33 |