Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000046619-22-000068-index-headers.html | 2022-12-21 16:24:22 | |
| 0000046619-22-000068-index.html | 2022-12-21 16:24:22 | |
| 0000046619-22-000068.txt | 2022-12-21 16:24:22 | |
 0000046619-22-000068-xbrl.zip | 18597 | 2022-12-21 16:24:22 |
| a20221221ex991directorappo.htm | 6473 | 2022-12-21 16:24:22 |
| FilingSummary.xml | 2356 | 2022-12-21 16:24:22 |
| Financial_Report.xlsx | 6477 | 2022-12-21 16:24:22 |
| hei-20221216.htm | 41157 | 2022-12-21 16:24:22 |
| hei-20221216.xsd | 3283 | 2022-12-21 16:24:22 |
| hei-20221216_def.xml | 19530 | 2022-12-21 16:24:22 |
| hei-20221216_htm.xml | 14198 | 2022-12-21 16:24:22 |
| hei-20221216_lab.xml | 36136 | 2022-12-21 16:24:22 |
| hei-20221216_pre.xml | 19846 | 2022-12-21 16:24:22 |
| MetaLinks.json | 26792 | 2022-12-21 16:24:22 |
| R1.htm | 14572 | 2022-12-21 16:24:22 |
| R2.htm | 30305 | 2022-12-21 16:24:22 |
| report.css | 2767 | 2022-12-21 16:24:22 |
| Show.js | 1085 | 2022-12-21 16:24:22 |