Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-24-000022-index-headers.html | 2024-05-14 14:11:57 | |
| 0000799233-24-000022-index.html | 2024-05-14 14:11:57 | |
| 0000799233-24-000022.txt | 2024-05-14 14:11:57 | |
 0000799233-24-000022-xbrl.zip | 9581 | 2024-05-14 14:11:57 |
| FilingSummary.xml | 1635 | 2024-05-14 14:11:57 |
| Financial_Report.xlsx | 5683 | 2024-05-14 14:11:57 |
| htld-20240509.htm | 41461 | 2024-05-14 14:11:57 |
| htld-20240509.xsd | 1928 | 2024-05-14 14:11:57 |
| htld-20240509_htm.xml | 2710 | 2024-05-14 14:11:57 |
| htld-20240509_lab.xml | 21629 | 2024-05-14 14:11:57 |
| htld-20240509_pre.xml | 12526 | 2024-05-14 14:11:57 |
| MetaLinks.json | 17095 | 2024-05-14 14:11:57 |
| R1.htm | 38082 | 2024-05-14 14:11:57 |
| report.css | 2766 | 2024-05-14 14:11:57 |
| Show.js | 1084 | 2024-05-14 14:11:57 |