Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-25-000013-index-headers.html | 2025-03-18 17:03:25 | |
| 0000799233-25-000013-index.html | 2025-03-18 17:03:25 | |
| 0000799233-25-000013.txt | 2025-03-18 17:03:25 | |
 0000799233-25-000013-xbrl.zip | 10861 | 2025-03-18 17:03:25 |
| FilingSummary.xml | 1644 | 2025-03-18 17:03:25 |
| Financial_Report.xlsx | 5711 | 2025-03-18 17:03:25 |
| htld-20250314.htm | 30721 | 2025-03-18 17:03:25 |
| htld-20250314.xsd | 2058 | 2025-03-18 17:03:25 |
| htld-20250314_htm.xml | 2709 | 2025-03-18 17:03:25 |
| htld-20250314_lab.xml | 22150 | 2025-03-18 17:03:25 |
| htld-20250314_pre.xml | 12633 | 2025-03-18 17:03:25 |
| htld2025q1dividendreleasee.htm | 3981 | 2025-03-18 17:03:25 |
| MetaLinks.json | 17281 | 2025-03-18 17:03:25 |
| R1.htm | 38099 | 2025-03-18 17:03:25 |
| report.css | 2767 | 2025-03-18 17:03:25 |
| Show.js | 1084 | 2025-03-18 17:03:25 |