Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-22-000058-index-headers.html | 2022-11-07 08:11:01 | |
| 0000799233-22-000058-index.html | 2022-11-07 08:11:01 | |
| 0000799233-22-000058.txt | 2022-11-07 08:11:01 | |
 0000799233-22-000058-xbrl.zip | 24211 | 2022-11-07 08:11:01 |
| FilingSummary.xml | 1665 | 2022-11-07 08:11:01 |
| Financial_Report.xlsx | 5685 | 2022-11-07 08:11:01 |
| htld-20221102.htm | 42140 | 2022-11-07 08:11:01 |
| htld-20221102.xsd | 1932 | 2022-11-07 08:11:01 |
| htld-20221102_htm.xml | 11257 | 2022-11-07 08:11:01 |
| htld-20221102_lab.xml | 23924 | 2022-11-07 08:11:01 |
| htld-20221102_pre.xml | 12616 | 2022-11-07 08:11:01 |
| htld2022q3earningsrelease9.htm | 238682 | 2022-11-07 08:11:01 |
| MetaLinks.json | 16714 | 2022-11-07 08:11:01 |
| R1.htm | 38082 | 2022-11-07 08:11:01 |
| report.css | 2767 | 2022-11-07 08:11:01 |
| Show.js | 1084 | 2022-11-07 08:11:01 |