Parent Directory| Name | Size | Last Modified |
|---|---|---|
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| 0000046619-23-000081-index.html | 2023-05-22 17:12:21 | |
| 0000046619-23-000081.txt | 2023-05-22 17:12:21 | |
 0000046619-23-000081-xbrl.zip | 28638 | 2023-05-22 17:12:21 |
| a04302023ex991earningsrele.htm | 193817 | 2023-05-22 17:12:21 |
| FilingSummary.xml | 2196 | 2023-05-22 17:12:21 |
| Financial_Report.xlsx | 6447 | 2023-05-22 17:12:21 |
| hei-20230522.htm | 41132 | 2023-05-22 17:12:21 |
| hei-20230522.xsd | 3133 | 2023-05-22 17:12:21 |
| hei-20230522_def.xml | 19338 | 2023-05-22 17:12:21 |
| hei-20230522_htm.xml | 14185 | 2023-05-22 17:12:21 |
| hei-20230522_lab.xml | 36136 | 2023-05-22 17:12:21 |
| hei-20230522_pre.xml | 19702 | 2023-05-22 17:12:21 |
| MetaLinks.json | 26032 | 2023-05-22 17:12:21 |
| R1.htm | 14527 | 2023-05-22 17:12:21 |
| R2.htm | 30291 | 2023-05-22 17:12:21 |
| report.css | 2767 | 2023-05-22 17:12:21 |
| Show.js | 1085 | 2023-05-22 17:12:21 |