Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-23-000007-index-headers.html | 2023-03-21 20:48:55 | |
| 0000799233-23-000007-index.html | 2023-03-21 20:48:55 | |
| 0000799233-23-000007.txt | 2023-03-21 20:48:55 | |
 0000799233-23-000007-xbrl.zip | 10746 | 2023-03-21 20:48:55 |
| FilingSummary.xml | 1675 | 2023-03-21 20:48:55 |
| Financial_Report.xlsx | 5691 | 2023-03-21 20:48:55 |
| htld-20230317.htm | 31699 | 2023-03-21 20:48:55 |
| htld-20230317.xsd | 2175 | 2023-03-21 20:48:55 |
| htld-20230317_htm.xml | 4100 | 2023-03-21 20:48:55 |
| htld-20230317_lab.xml | 24451 | 2023-03-21 20:48:55 |
| htld-20230317_pre.xml | 12631 | 2023-03-21 20:48:55 |
| htld2023q1dividendreleasee.htm | 4058 | 2023-03-21 20:48:55 |
| MetaLinks.json | 17381 | 2023-03-21 20:48:55 |
| R1.htm | 38122 | 2023-03-21 20:48:55 |
| report.css | 2767 | 2023-03-21 20:48:55 |
| Show.js | 1084 | 2023-03-21 20:48:55 |