Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-23-000044-index-headers.html | 2023-11-02 17:19:33 | |
| 0000799233-23-000044-index.html | 2023-11-02 17:19:33 | |
| 0000799233-23-000044.txt | 2023-11-02 17:19:33 | |
 0000799233-23-000044-xbrl.zip | 9729 | 2023-11-02 17:19:33 |
| FilingSummary.xml | 1630 | 2023-11-02 17:19:33 |
| Financial_Report.xlsx | 5680 | 2023-11-02 17:19:33 |
| htld-20231030.htm | 28608 | 2023-11-02 17:19:33 |
| htld-20231030.xsd | 1928 | 2023-11-02 17:19:33 |
| htld-20231030_htm.xml | 2710 | 2023-11-02 17:19:33 |
| htld-20231030_lab.xml | 23834 | 2023-11-02 17:19:33 |
| htld-20231030_pre.xml | 12526 | 2023-11-02 17:19:33 |
| MetaLinks.json | 17096 | 2023-11-02 17:19:33 |
| R1.htm | 38079 | 2023-11-02 17:19:33 |
| report.css | 2766 | 2023-11-02 17:19:33 |
| Show.js | 1084 | 2023-11-02 17:19:33 |