Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-20-000058-index-headers.html | 2020-11-23 18:24:57 | |
| 0000799233-20-000058-index.html | 2020-11-23 18:24:57 | |
| 0000799233-20-000058.txt | 2020-11-23 18:24:57 | |
 0000799233-20-000058-xbrl.zip | 13295 | 2020-11-23 18:24:57 |
| FilingSummary.xml | 1743 | 2020-11-23 18:24:57 |
| Financial_Report.xlsx | 5479 | 2020-11-23 18:24:57 |
| htld-20201123.htm | 38677 | 2020-11-23 18:24:57 |
| htld-20201123.xsd | 2696 | 2020-11-23 18:24:57 |
| htld-20201123_cal.xml | 738 | 2020-11-23 18:24:57 |
| htld-20201123_def.xml | 1675 | 2020-11-23 18:24:57 |
| htld-20201123_htm.xml | 11090 | 2020-11-23 18:24:57 |
| htld-20201123_lab.xml | 24583 | 2020-11-23 18:24:57 |
| htld-20201123_pre.xml | 12763 | 2020-11-23 18:24:57 |
| MetaLinks.json | 17584 | 2020-11-23 18:24:57 |
| q42020dividendpressrel.htm | 4450 | 2020-11-23 18:24:57 |
| R1.htm | 39673 | 2020-11-23 18:24:57 |
| report.css | 2767 | 2020-11-23 18:24:57 |
| Show.js | 1085 | 2020-11-23 18:24:57 |