Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-22-000047-index-headers.html | 2022-08-31 17:13:15 | |
| 0000799233-22-000047-index.html | 2022-08-31 17:13:15 | |
| 0000799233-22-000047.txt | 2022-08-31 17:13:15 | |
 0000799233-22-000047-xbrl.zip | 20474 | 2022-08-31 17:13:15 |
| FilingSummary.xml | 1665 | 2022-08-31 17:13:15 |
| Financial_Report.xlsx | 5681 | 2022-08-31 17:13:15 |
| htld-20220831.htm | 73689 | 2022-08-31 17:13:15 |
| htld-20220831.xsd | 1932 | 2022-08-31 17:13:15 |
| htld-20220831_htm.xml | 11257 | 2022-08-31 17:13:15 |
| htld-20220831_lab.xml | 23924 | 2022-08-31 17:13:15 |
| htld-20220831_pre.xml | 12616 | 2022-08-31 17:13:15 |
| htld2022august31acquisitio.htm | 9834 | 2022-08-31 17:13:15 |
| MetaLinks.json | 16714 | 2022-08-31 17:13:15 |
| R1.htm | 38081 | 2022-08-31 17:13:15 |
| report.css | 2767 | 2022-08-31 17:13:15 |
| Show.js | 1084 | 2022-08-31 17:13:15 |