Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-23-000053-index-headers.html | 2023-11-22 17:50:35 | |
| 0000799233-23-000053-index.html | 2023-11-22 17:50:35 | |
| 0000799233-23-000053.txt | 2023-11-22 17:50:35 | |
 0000799233-23-000053-xbrl.zip | 10618 | 2023-11-22 17:50:35 |
| FilingSummary.xml | 1644 | 2023-11-22 17:50:35 |
| Financial_Report.xlsx | 5689 | 2023-11-22 17:50:35 |
| htld-20231121.htm | 30586 | 2023-11-22 17:50:35 |
| htld-20231121.xsd | 2177 | 2023-11-22 17:50:35 |
| htld-20231121_htm.xml | 2709 | 2023-11-22 17:50:35 |
| htld-20231121_lab.xml | 24453 | 2023-11-22 17:50:35 |
| htld-20231121_pre.xml | 12633 | 2023-11-22 17:50:35 |
| htld2023q4dividendreleasee.htm | 3993 | 2023-11-22 17:50:35 |
| MetaLinks.json | 17281 | 2023-11-22 17:50:35 |
| R1.htm | 38114 | 2023-11-22 17:50:35 |
| report.css | 2767 | 2023-11-22 17:50:35 |
| Show.js | 1084 | 2023-11-22 17:50:35 |