Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000046619-21-000033-index-headers.html | 2021-05-25 17:19:23 | |
| 0000046619-21-000033-index.html | 2021-05-25 17:19:23 | |
| 0000046619-21-000033.txt | 2021-05-25 17:19:23 | |
 0000046619-21-000033-xbrl.zip | 27944 | 2021-05-25 17:19:23 |
| a04302021q2ex991earningsre.htm | 182168 | 2021-05-25 17:19:23 |
| FilingSummary.xml | 2253 | 2021-05-25 17:19:23 |
| Financial_Report.xlsx | 6375 | 2021-05-25 17:19:23 |
| hei-20210525.htm | 40930 | 2021-05-25 17:19:23 |
| hei-20210525.xsd | 3143 | 2021-05-25 17:19:23 |
| hei-20210525_def.xml | 19362 | 2021-05-25 17:19:23 |
| hei-20210525_htm.xml | 14187 | 2021-05-25 17:19:23 |
| hei-20210525_lab.xml | 36154 | 2021-05-25 17:19:23 |
| hei-20210525_pre.xml | 19720 | 2021-05-25 17:19:23 |
| MetaLinks.json | 25564 | 2021-05-25 17:19:23 |
| R1.htm | 14687 | 2021-05-25 17:19:23 |
| R2.htm | 30678 | 2021-05-25 17:19:23 |
| report.css | 2767 | 2021-05-25 17:19:23 |
| Show.js | 1085 | 2021-05-25 17:19:23 |