Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-23-000023-index-headers.html | 2023-05-15 18:27:11 | |
| 0000799233-23-000023-index.html | 2023-05-15 18:27:11 | |
| 0000799233-23-000023.txt | 2023-05-15 18:27:11 | |
 0000799233-23-000023-xbrl.zip | 11688 | 2023-05-15 18:27:11 |
| FilingSummary.xml | 1615 | 2023-05-15 18:27:11 |
| Financial_Report.xlsx | 5681 | 2023-05-15 18:27:11 |
| htld-20230511.htm | 58492 | 2023-05-15 18:27:11 |
| htld-20230511.xsd | 1932 | 2023-05-15 18:27:11 |
| htld-20230511_htm.xml | 11259 | 2023-05-15 18:27:11 |
| htld-20230511_lab.xml | 23924 | 2023-05-15 18:27:11 |
| htld-20230511_pre.xml | 12616 | 2023-05-15 18:27:11 |
| MetaLinks.json | 17248 | 2023-05-15 18:27:11 |
| R1.htm | 38077 | 2023-05-15 18:27:11 |
| report.css | 2766 | 2023-05-15 18:27:11 |
| Show.js | 1084 | 2023-05-15 18:27:11 |