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| 0000046619-18-000016-index.html | 2018-03-01 16:50:10 | |
| 0000046619-18-000016.txt | 2018-03-01 16:50:10 | |
 0000046619-18-000016-xbrl.zip | 169090 | 2018-03-01 16:50:10 |
| a13118heiexhibit311.htm | 13182 | 2018-03-01 16:50:10 |
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| a13118heiexhibit321.htm | 6812 | 2018-03-01 16:50:10 |
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| Financial_Report.xlsx | 58436 | 2018-03-01 16:50:10 |
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| hei-20180131.xsd | 42284 | 2018-03-01 16:50:10 |
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| report.css | 2767 | 2018-03-01 16:50:10 |
| Show.js | 1410 | 2018-03-01 16:50:10 |