Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-22-000051-index-headers.html | 2022-09-19 18:10:11 | |
| 0000799233-22-000051-index.html | 2022-09-19 18:10:11 | |
| 0000799233-22-000051.txt | 2022-09-19 18:10:11 | |
 0000799233-22-000051-xbrl.zip | 12023 | 2022-09-19 18:10:11 |
| FilingSummary.xml | 1677 | 2022-09-19 18:10:11 |
| Financial_Report.xlsx | 5688 | 2022-09-19 18:10:11 |
| htld-20220916.htm | 38431 | 2022-09-19 18:10:11 |
| htld-20220916.xsd | 2175 | 2022-09-19 18:10:11 |
| htld-20220916_htm.xml | 10816 | 2022-09-19 18:10:11 |
| htld-20220916_lab.xml | 24451 | 2022-09-19 18:10:11 |
| htld-20220916_pre.xml | 12631 | 2022-09-19 18:10:11 |
| htld2022q3dividendreleasee.htm | 4044 | 2022-09-19 18:10:11 |
| MetaLinks.json | 16849 | 2022-09-19 18:10:11 |
| R1.htm | 38124 | 2022-09-19 18:10:11 |
| report.css | 2767 | 2022-09-19 18:10:11 |
| Show.js | 1084 | 2022-09-19 18:10:11 |