Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-24-000007-index-headers.html | 2024-03-19 10:38:25 | |
| 0000799233-24-000007-index.html | 2024-03-19 10:38:25 | |
| 0000799233-24-000007.txt | 2024-03-19 10:38:25 | |
 0000799233-24-000007-xbrl.zip | 10548 | 2024-03-19 10:38:25 |
| FilingSummary.xml | 1644 | 2024-03-19 10:38:25 |
| Financial_Report.xlsx | 5691 | 2024-03-19 10:38:25 |
| htld-20240315.htm | 30282 | 2024-03-19 10:38:25 |
| htld-20240315.xsd | 2177 | 2024-03-19 10:38:25 |
| htld-20240315_htm.xml | 2709 | 2024-03-19 10:38:25 |
| htld-20240315_lab.xml | 22150 | 2024-03-19 10:38:25 |
| htld-20240315_pre.xml | 12633 | 2024-03-19 10:38:25 |
| htld2024q1dividendreleasee.htm | 3979 | 2024-03-19 10:38:25 |
| MetaLinks.json | 17281 | 2024-03-19 10:38:25 |
| R1.htm | 38114 | 2024-03-19 10:38:25 |
| report.css | 2767 | 2024-03-19 10:38:25 |
| Show.js | 1084 | 2024-03-19 10:38:25 |