Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000046619-21-000080-index-headers.html | 2021-12-15 16:49:56 | |
| 0000046619-21-000080-index.html | 2021-12-15 16:49:56 | |
| 0000046619-21-000080.txt | 2021-12-15 16:49:56 | |
 0000046619-21-000080-xbrl.zip | 28570 | 2021-12-15 16:49:56 |
| a10312021q4earningsrelease.htm | 182025 | 2021-12-15 16:49:56 |
| FilingSummary.xml | 2413 | 2021-12-15 16:49:56 |
| Financial_Report.xlsx | 6404 | 2021-12-15 16:49:56 |
| hei-20211215.htm | 40737 | 2021-12-15 16:49:56 |
| hei-20211215.xsd | 3295 | 2021-12-15 16:49:56 |
| hei-20211215_def.xml | 19554 | 2021-12-15 16:49:56 |
| hei-20211215_htm.xml | 14191 | 2021-12-15 16:49:56 |
| hei-20211215_lab.xml | 36154 | 2021-12-15 16:49:56 |
| hei-20211215_pre.xml | 19864 | 2021-12-15 16:49:56 |
| MetaLinks.json | 26272 | 2021-12-15 16:49:56 |
| R1.htm | 14732 | 2021-12-15 16:49:56 |
| R2.htm | 30692 | 2021-12-15 16:49:56 |
| report.css | 2767 | 2021-12-15 16:49:56 |
| Show.js | 1085 | 2021-12-15 16:49:56 |