Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-20-000054-index-headers.html | 2020-11-20 18:12:16 | |
| 0000799233-20-000054-index.html | 2020-11-20 18:12:16 | |
| 0000799233-20-000054.txt | 2020-11-20 18:12:16 | |
 0000799233-20-000054-xbrl.zip | 11910 | 2020-11-20 18:12:16 |
| FilingSummary.xml | 1685 | 2020-11-20 18:12:16 |
| Financial_Report.xlsx | 5467 | 2020-11-20 18:12:16 |
| htld-20201120.htm | 40620 | 2020-11-20 18:12:16 |
| htld-20201120.xsd | 2447 | 2020-11-20 18:12:16 |
| htld-20201120_cal.xml | 726 | 2020-11-20 18:12:16 |
| htld-20201120_def.xml | 1659 | 2020-11-20 18:12:16 |
| htld-20201120_htm.xml | 11515 | 2020-11-20 18:12:16 |
| htld-20201120_lab.xml | 23970 | 2020-11-20 18:12:16 |
| htld-20201120_pre.xml | 12662 | 2020-11-20 18:12:16 |
| MetaLinks.json | 17405 | 2020-11-20 18:12:16 |
| R1.htm | 39638 | 2020-11-20 18:12:16 |
| report.css | 2767 | 2020-11-20 18:12:16 |
| Show.js | 1085 | 2020-11-20 18:12:16 |