Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-23-000051-index-headers.html | 2023-11-13 17:35:35 | |
| 0000799233-23-000051-index.html | 2023-11-13 17:35:35 | |
| 0000799233-23-000051.txt | 2023-11-13 17:35:35 | |
 0000799233-23-000051-xbrl.zip | 9548 | 2023-11-13 17:35:35 |
| FilingSummary.xml | 1644 | 2023-11-13 17:35:35 |
| Financial_Report.xlsx | 5688 | 2023-11-13 17:35:35 |
| htld-20231110.htm | 27027 | 2023-11-13 17:35:35 |
| htld-20231110.xsd | 2177 | 2023-11-13 17:35:35 |
| htld-20231110_htm.xml | 2709 | 2023-11-13 17:35:35 |
| htld-20231110_lab.xml | 24453 | 2023-11-13 17:35:35 |
| htld-20231110_pre.xml | 12633 | 2023-11-13 17:35:35 |
| MetaLinks.json | 17281 | 2023-11-13 17:35:35 |
| R1.htm | 38114 | 2023-11-13 17:35:35 |
| report.css | 2766 | 2023-11-13 17:35:35 |
| Show.js | 1084 | 2023-11-13 17:35:35 |