Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-23-000026-index-headers.html | 2023-06-21 12:38:37 | |
| 0000799233-23-000026-index.html | 2023-06-21 12:38:37 | |
| 0000799233-23-000026.txt | 2023-06-21 12:38:37 | |
 0000799233-23-000026-xbrl.zip | 10655 | 2023-06-21 12:38:37 |
| FilingSummary.xml | 1675 | 2023-06-21 12:38:37 |
| Financial_Report.xlsx | 5690 | 2023-06-21 12:38:37 |
| htld-20230616.htm | 31697 | 2023-06-21 12:38:37 |
| htld-20230616.xsd | 2177 | 2023-06-21 12:38:37 |
| htld-20230616_htm.xml | 4100 | 2023-06-21 12:38:37 |
| htld-20230616_lab.xml | 24453 | 2023-06-21 12:38:37 |
| htld-20230616_pre.xml | 12633 | 2023-06-21 12:38:37 |
| htld2023q2dividendreleasee.htm | 3972 | 2023-06-21 12:38:37 |
| MetaLinks.json | 17379 | 2023-06-21 12:38:37 |
| R1.htm | 38114 | 2023-06-21 12:38:37 |
| report.css | 2767 | 2023-06-21 12:38:37 |
| Show.js | 1084 | 2023-06-21 12:38:37 |