Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-21-000050-index-headers.html | 2021-10-29 17:50:03 | |
| 0000799233-21-000050-index.html | 2021-10-29 17:50:03 | |
| 0000799233-21-000050.txt | 2021-10-29 17:50:03 | |
 0000799233-21-000050-xbrl.zip | 10658 | 2021-10-29 17:50:03 |
| FilingSummary.xml | 1602 | 2021-10-29 17:50:03 |
| Financial_Report.xlsx | 5681 | 2021-10-29 17:50:03 |
| htld-20211029.htm | 38957 | 2021-10-29 17:50:03 |
| htld-20211029.xsd | 1926 | 2021-10-29 17:50:03 |
| htld-20211029_htm.xml | 11580 | 2021-10-29 17:50:03 |
| htld-20211029_lab.xml | 23832 | 2021-10-29 17:50:03 |
| htld-20211029_pre.xml | 12524 | 2021-10-29 17:50:03 |
| MetaLinks.json | 16664 | 2021-10-29 17:50:03 |
| R1.htm | 39596 | 2021-10-29 17:50:03 |
| report.css | 2766 | 2021-10-29 17:50:03 |
| Show.js | 1084 | 2021-10-29 17:50:03 |