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| 0000046619-17-000009-index.html | 2017-03-02 14:40:25 | |
| 0000046619-17-000009.txt | 2017-03-02 14:40:25 | |
 0000046619-17-000009-xbrl.zip | 161481 | 2017-03-02 14:40:25 |
| a13117heiexhibit311.htm | 13182 | 2017-03-02 14:40:25 |
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| a13117heiexhibit321.htm | 6812 | 2017-03-02 14:40:25 |
| a13117heiexhibit322.htm | 6827 | 2017-03-02 14:40:25 |
| a13117heiform10q.htm | 957367 | 2017-03-02 14:40:25 |
| FilingSummary.xml | 32021 | 2017-03-02 14:40:25 |
| Financial_Report.xlsx | 53501 | 2017-03-02 14:40:25 |
| hei-20170131.xml | 1174689 | 2017-03-02 14:40:25 |
| hei-20170131.xsd | 40231 | 2017-03-02 14:40:25 |
| hei-20170131_cal.xml | 78934 | 2017-03-02 14:40:25 |
| hei-20170131_def.xml | 283836 | 2017-03-02 14:40:25 |
| hei-20170131_lab.xml | 546533 | 2017-03-02 14:40:25 |
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| report.css | 2767 | 2017-03-02 14:40:25 |
| Show.js | 1410 | 2017-03-02 14:40:25 |