Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-21-000048-index-headers.html | 2021-10-15 18:44:38 | |
| 0000799233-21-000048-index.html | 2021-10-15 18:44:38 | |
| 0000799233-21-000048.txt | 2021-10-15 18:44:38 | |
 0000799233-21-000048-xbrl.zip | 22589 | 2021-10-15 18:44:38 |
| FilingSummary.xml | 1650 | 2021-10-15 18:44:38 |
| Financial_Report.xlsx | 5682 | 2021-10-15 18:44:38 |
| htld-20211014.htm | 42290 | 2021-10-15 18:44:38 |
| htld-20211014.xsd | 1926 | 2021-10-15 18:44:38 |
| htld-20211014_htm.xml | 11506 | 2021-10-15 18:44:38 |
| htld-20211014_lab.xml | 23832 | 2021-10-15 18:44:38 |
| htld-20211014_pre.xml | 12524 | 2021-10-15 18:44:38 |
| htld2021q3earningsreleasee.htm | 208375 | 2021-10-15 18:44:38 |
| MetaLinks.json | 16664 | 2021-10-15 18:44:38 |
| R1.htm | 39596 | 2021-10-15 18:44:38 |
| report.css | 2767 | 2021-10-15 18:44:38 |
| Show.js | 1084 | 2021-10-15 18:44:38 |