Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-22-000037-index-headers.html | 2022-07-27 16:05:59 | |
| 0000799233-22-000037-index.html | 2022-07-27 16:05:59 | |
| 0000799233-22-000037.txt | 2022-07-27 16:05:59 | |
 0000799233-22-000037-xbrl.zip | 22824 | 2022-07-27 16:05:59 |
| FilingSummary.xml | 1662 | 2022-07-27 16:05:59 |
| Financial_Report.xlsx | 5682 | 2022-07-27 16:05:59 |
| htld-20220725.htm | 42388 | 2022-07-27 16:05:59 |
| htld-20220725.xsd | 1932 | 2022-07-27 16:05:59 |
| htld-20220725_htm.xml | 11257 | 2022-07-27 16:05:59 |
| htld-20220725_lab.xml | 23924 | 2022-07-27 16:05:59 |
| htld-20220725_pre.xml | 12616 | 2022-07-27 16:05:59 |
| htld2022q2earningsrelease.htm | 226702 | 2022-07-27 16:05:59 |
| MetaLinks.json | 16714 | 2022-07-27 16:05:59 |
| R1.htm | 38531 | 2022-07-27 16:05:59 |
| report.css | 2767 | 2022-07-27 16:05:59 |
| Show.js | 1084 | 2022-07-27 16:05:59 |