Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000046619-25-000030-index-headers.html | 2025-04-22 13:55:57 | |
| 0000046619-25-000030-index.html | 2025-04-22 13:55:57 | |
| 0000046619-25-000030.txt | 2025-04-22 13:55:57 | |
 0000046619-25-000030-xbrl.zip | 18447 | 2025-04-22 13:55:57 |
| a04222025ex991managementch.htm | 13044 | 2025-04-22 13:55:57 |
| FilingSummary.xml | 2341 | 2025-04-22 13:55:57 |
| Financial_Report.xlsx | 6500 | 2025-04-22 13:55:57 |
| hei-20250418.htm | 30264 | 2025-04-22 13:55:57 |
| hei-20250418.xsd | 3168 | 2025-04-22 13:55:57 |
| hei-20250418_def.xml | 19368 | 2025-04-22 13:55:57 |
| hei-20250418_htm.xml | 4040 | 2025-04-22 13:55:57 |
| hei-20250418_lab.xml | 32659 | 2025-04-22 13:55:57 |
| hei-20250418_pre.xml | 19848 | 2025-04-22 13:55:57 |
 image_0.jpg | 68473 | 2025-04-22 13:55:57 |
 image_1.jpg | 62049 | 2025-04-22 13:55:57 |
| MetaLinks.json | 26709 | 2025-04-22 13:55:57 |
| R1.htm | 14557 | 2025-04-22 13:55:57 |
| R2.htm | 30291 | 2025-04-22 13:55:57 |
| report.css | 2767 | 2025-04-22 13:55:57 |
| Show.js | 1085 | 2025-04-22 13:55:57 |