Parent Directory| Name | Size | Last Modified |
|---|---|---|
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| 0000046619-22-000028-index.html | 2022-05-23 17:18:43 | |
| 0000046619-22-000028.txt | 2022-05-23 17:18:43 | |
 0000046619-22-000028-xbrl.zip | 27807 | 2022-05-23 17:18:43 |
| a04302022ex991earningsrele.htm | 180083 | 2022-05-23 17:18:43 |
| FilingSummary.xml | 2196 | 2022-05-23 17:18:43 |
| Financial_Report.xlsx | 6376 | 2022-05-23 17:18:43 |
| hei-20220523.htm | 40523 | 2022-05-23 17:18:43 |
| hei-20220523.xsd | 3131 | 2022-05-23 17:18:43 |
| hei-20220523_def.xml | 19338 | 2022-05-23 17:18:43 |
| hei-20220523_htm.xml | 14185 | 2022-05-23 17:18:43 |
| hei-20220523_lab.xml | 36136 | 2022-05-23 17:18:43 |
| hei-20220523_pre.xml | 19702 | 2022-05-23 17:18:43 |
| MetaLinks.json | 25396 | 2022-05-23 17:18:43 |
| R1.htm | 14729 | 2022-05-23 17:18:43 |
| R2.htm | 30778 | 2022-05-23 17:18:43 |
| report.css | 2767 | 2022-05-23 17:18:43 |
| Show.js | 1085 | 2022-05-23 17:18:43 |