Parent Directory| Name | Size | Last Modified |
|---|---|---|
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| 0000046619-22-000040-index.html | 2022-08-29 17:19:58 | |
| 0000046619-22-000040.txt | 2022-08-29 17:19:58 | |
 0000046619-22-000040-xbrl.zip | 28824 | 2022-08-29 17:19:58 |
| a07312022ex991earningsrele.htm | 187475 | 2022-08-29 17:19:58 |
| FilingSummary.xml | 2198 | 2022-08-29 17:19:58 |
| Financial_Report.xlsx | 6449 | 2022-08-29 17:19:58 |
| hei-20220829.htm | 41347 | 2022-08-29 17:19:58 |
| hei-20220829.xsd | 3131 | 2022-08-29 17:19:58 |
| hei-20220829_def.xml | 19338 | 2022-08-29 17:19:58 |
| hei-20220829_htm.xml | 14185 | 2022-08-29 17:19:58 |
| hei-20220829_lab.xml | 36136 | 2022-08-29 17:19:58 |
| hei-20220829_pre.xml | 19702 | 2022-08-29 17:19:58 |
| MetaLinks.json | 25396 | 2022-08-29 17:19:58 |
| R1.htm | 14531 | 2022-08-29 17:19:58 |
| R2.htm | 30294 | 2022-08-29 17:19:58 |
| report.css | 2767 | 2022-08-29 17:19:58 |
| Show.js | 1085 | 2022-08-29 17:19:58 |