Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-23-000002-index-headers.html | 2023-02-08 18:39:16 | |
| 0000799233-23-000002-index.html | 2023-02-08 18:39:16 | |
| 0000799233-23-000002.txt | 2023-02-08 18:39:16 | |
 0000799233-23-000002-xbrl.zip | 23718 | 2023-02-08 18:39:16 |
| a2022q4earningsrelease.htm | 185741 | 2023-02-08 18:39:16 |
| FilingSummary.xml | 1659 | 2023-02-08 18:39:16 |
| Financial_Report.xlsx | 5685 | 2023-02-08 18:39:16 |
| htld-20230203.htm | 42069 | 2023-02-08 18:39:16 |
| htld-20230203.xsd | 1932 | 2023-02-08 18:39:16 |
| htld-20230203_htm.xml | 11257 | 2023-02-08 18:39:16 |
| htld-20230203_lab.xml | 23924 | 2023-02-08 18:39:16 |
| htld-20230203_pre.xml | 12616 | 2023-02-08 18:39:16 |
| MetaLinks.json | 17248 | 2023-02-08 18:39:16 |
| R1.htm | 38080 | 2023-02-08 18:39:16 |
| report.css | 2767 | 2023-02-08 18:39:16 |
| Show.js | 1084 | 2023-02-08 18:39:16 |