Parent Directory| Name | Size | Last Modified |
|---|---|---|
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| 0000046619-22-000010-index.html | 2022-03-21 16:32:43 | |
| 0000046619-22-000010.txt | 2022-03-21 16:32:43 | |
 0000046619-22-000010-xbrl.zip | 15400 | 2022-03-21 16:32:43 |
| FilingSummary.xml | 2264 | 2022-03-21 16:32:43 |
| Financial_Report.xlsx | 6403 | 2022-03-21 16:32:43 |
| hei-20220318.htm | 55721 | 2022-03-21 16:32:43 |
| hei-20220318.xsd | 3257 | 2022-03-21 16:32:43 |
| hei-20220318_def.xml | 13624 | 2022-03-21 16:32:43 |
| hei-20220318_htm.xml | 13306 | 2022-03-21 16:32:43 |
| hei-20220318_lab.xml | 32244 | 2022-03-21 16:32:43 |
| hei-20220318_pre.xml | 17650 | 2022-03-21 16:32:43 |
| MetaLinks.json | 23613 | 2022-03-21 16:32:43 |
| R1.htm | 14508 | 2022-03-21 16:32:43 |
| R2.htm | 30799 | 2022-03-21 16:32:43 |
| report.css | 2767 | 2022-03-21 16:32:43 |
| Show.js | 1085 | 2022-03-21 16:32:43 |