Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000046619-22-000006-index-headers.html | 2022-02-23 17:04:24 | |
| 0000046619-22-000006-index.html | 2022-02-23 17:04:24 | |
| 0000046619-22-000006.txt | 2022-02-23 17:04:24 | |
 0000046619-22-000006-xbrl.zip | 26816 | 2022-02-23 17:04:24 |
| a01312022q1ex991earningsre.htm | 140303 | 2022-02-23 17:04:24 |
| FilingSummary.xml | 2361 | 2022-02-23 17:04:24 |
| Financial_Report.xlsx | 6406 | 2022-02-23 17:04:24 |
| hei-20220223.htm | 41366 | 2022-02-23 17:04:24 |
| hei-20220223.xsd | 3301 | 2022-02-23 17:04:24 |
| hei-20220223_def.xml | 19682 | 2022-02-23 17:04:24 |
| hei-20220223_htm.xml | 14193 | 2022-02-23 17:04:24 |
| hei-20220223_lab.xml | 36278 | 2022-02-23 17:04:24 |
| hei-20220223_pre.xml | 19992 | 2022-02-23 17:04:24 |
| MetaLinks.json | 26339 | 2022-02-23 17:04:24 |
| R1.htm | 14734 | 2022-02-23 17:04:24 |
| R2.htm | 30686 | 2022-02-23 17:04:24 |
| report.css | 2767 | 2022-02-23 17:04:24 |
| Show.js | 1085 | 2022-02-23 17:04:24 |