Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000046619-20-000073-index-headers.html | 2020-12-21 17:16:36 | |
| 0000046619-20-000073-index.html | 2020-12-21 17:16:36 | |
| 0000046619-20-000073.txt | 2020-12-21 17:16:36 | |
 0000046619-20-000073-xbrl.zip | 29829 | 2020-12-21 17:16:36 |
| a10312020q4earningsrelease.htm | 182687 | 2020-12-21 17:16:36 |
| FilingSummary.xml | 2456 | 2020-12-21 17:16:36 |
| Financial_Report.xlsx | 6184 | 2020-12-21 17:16:36 |
| hei-20201221.htm | 40709 | 2020-12-21 17:16:36 |
| hei-20201221.xsd | 3560 | 2020-12-21 17:16:36 |
| hei-20201221_cal.xml | 1134 | 2020-12-21 17:16:36 |
| hei-20201221_def.xml | 19742 | 2020-12-21 17:16:36 |
| hei-20201221_htm.xml | 14195 | 2020-12-21 17:16:36 |
| hei-20201221_lab.xml | 36337 | 2020-12-21 17:16:36 |
| hei-20201221_pre.xml | 20053 | 2020-12-21 17:16:36 |
| MetaLinks.json | 27033 | 2020-12-21 17:16:36 |
| R1.htm | 14771 | 2020-12-21 17:16:36 |
| R2.htm | 30693 | 2020-12-21 17:16:36 |
| report.css | 2767 | 2020-12-21 17:16:36 |
| Show.js | 1085 | 2020-12-21 17:16:36 |