Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000046619-21-000037-index-headers.html | 2021-08-24 16:55:45 | |
| 0000046619-21-000037-index.html | 2021-08-24 16:55:45 | |
| 0000046619-21-000037.txt | 2021-08-24 16:55:45 | |
 0000046619-21-000037-xbrl.zip | 28720 | 2021-08-24 16:55:45 |
| a7312021q3ex991earningsrel.htm | 186836 | 2021-08-24 16:55:45 |
| FilingSummary.xml | 2253 | 2021-08-24 16:55:45 |
| Financial_Report.xlsx | 6378 | 2021-08-24 16:55:45 |
| hei-20210824.htm | 41244 | 2021-08-24 16:55:45 |
| hei-20210824.xsd | 3143 | 2021-08-24 16:55:45 |
| hei-20210824_def.xml | 19362 | 2021-08-24 16:55:45 |
| hei-20210824_htm.xml | 14082 | 2021-08-24 16:55:45 |
| hei-20210824_lab.xml | 36154 | 2021-08-24 16:55:45 |
| hei-20210824_pre.xml | 19720 | 2021-08-24 16:55:45 |
| MetaLinks.json | 25564 | 2021-08-24 16:55:45 |
| R1.htm | 14689 | 2021-08-24 16:55:45 |
| R2.htm | 30679 | 2021-08-24 16:55:45 |
| report.css | 2767 | 2021-08-24 16:55:45 |
| Show.js | 1085 | 2021-08-24 16:55:45 |