Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000046619-21-000017-index-headers.html | 2021-02-23 17:23:20 | |
| 0000046619-21-000017-index.html | 2021-02-23 17:23:20 | |
| 0000046619-21-000017.txt | 2021-02-23 17:23:20 | |
 0000046619-21-000017-xbrl.zip | 27352 | 2021-02-23 17:23:20 |
| a01312021q1ex991earningsre.htm | 141533 | 2021-02-23 17:23:20 |
| FilingSummary.xml | 2456 | 2021-02-23 17:23:20 |
| Financial_Report.xlsx | 6186 | 2021-02-23 17:23:20 |
| hei-20210223.htm | 40964 | 2021-02-23 17:23:20 |
| hei-20210223.xsd | 3560 | 2021-02-23 17:23:20 |
| hei-20210223_cal.xml | 1134 | 2021-02-23 17:23:20 |
| hei-20210223_def.xml | 19742 | 2021-02-23 17:23:20 |
| hei-20210223_htm.xml | 14206 | 2021-02-23 17:23:20 |
| hei-20210223_lab.xml | 36337 | 2021-02-23 17:23:20 |
| hei-20210223_pre.xml | 20053 | 2021-02-23 17:23:20 |
| MetaLinks.json | 27033 | 2021-02-23 17:23:20 |
| R1.htm | 14771 | 2021-02-23 17:23:20 |
| R2.htm | 30693 | 2021-02-23 17:23:20 |
| report.css | 2767 | 2021-02-23 17:23:20 |
| Show.js | 1085 | 2021-02-23 17:23:20 |