Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-24-000012-index-headers.html | 2024-03-29 11:22:36 | |
| 0000799233-24-000012-index.html | 2024-03-29 11:22:36 | |
| 0000799233-24-000012.txt | 2024-03-29 11:22:36 | |
 0000799233-24-000012-xbrl.zip | 1219534 | 2024-03-29 11:22:36 |
| FilingSummary.xml | 2771 | 2024-03-29 11:22:36 |
| htld-20240327.htm | 561001 | 2024-03-29 11:22:36 |
| htld-20240327.xsd | 11836 | 2024-03-29 11:22:36 |
| htld-20240327_def.xml | 26829 | 2024-03-29 11:22:36 |
 htld-20240327_g1.jpg | 442159 | 2024-03-29 11:22:36 |
 htld-20240327_g2.jpg | 432629 | 2024-03-29 11:22:36 |
 htld-20240327_g3.jpg | 445397 | 2024-03-29 11:22:36 |
 htld-20240327_g4.jpg | 167135 | 2024-03-29 11:22:36 |
 htld-20240327_g5.jpg | 170612 | 2024-03-29 11:22:36 |
| htld-20240327_htm.xml | 93141 | 2024-03-29 11:22:36 |
| htld-20240327_lab.xml | 60694 | 2024-03-29 11:22:36 |
| htld-20240327_pre.xml | 28532 | 2024-03-29 11:22:36 |
| MetaLinks.json | 34006 | 2024-03-29 11:22:36 |
| R1.htm | 10846 | 2024-03-29 11:22:36 |
| R2.htm | 121146 | 2024-03-29 11:22:36 |
| report.css | 2767 | 2024-03-29 11:22:36 |
| Show.js | 1085 | 2024-03-29 11:22:36 |