Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-23-000041-index-headers.html | 2023-10-31 10:36:12 | |
| 0000799233-23-000041-index.html | 2023-10-31 10:36:12 | |
| 0000799233-23-000041.txt | 2023-10-31 10:36:12 | |
 0000799233-23-000041-xbrl.zip | 22055 | 2023-10-31 10:36:12 |
| FilingSummary.xml | 1630 | 2023-10-31 10:36:12 |
| Financial_Report.xlsx | 5683 | 2023-10-31 10:36:12 |
| htld-20231026.htm | 34881 | 2023-10-31 10:36:12 |
| htld-20231026.xsd | 1928 | 2023-10-31 10:36:12 |
| htld-20231026_htm.xml | 3477 | 2023-10-31 10:36:12 |
| htld-20231026_lab.xml | 23834 | 2023-10-31 10:36:12 |
| htld-20231026_pre.xml | 12526 | 2023-10-31 10:36:12 |
| htld2023q3earningsrelease.htm | 236450 | 2023-10-31 10:36:12 |
| MetaLinks.json | 17096 | 2023-10-31 10:36:12 |
| R1.htm | 38078 | 2023-10-31 10:36:12 |
| report.css | 2767 | 2023-10-31 10:36:12 |
| Show.js | 1084 | 2023-10-31 10:36:12 |