Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-23-000039-index-headers.html | 2023-09-19 10:14:01 | |
| 0000799233-23-000039-index.html | 2023-09-19 10:14:01 | |
| 0000799233-23-000039.txt | 2023-09-19 10:14:01 | |
 0000799233-23-000039-xbrl.zip | 10614 | 2023-09-19 10:14:01 |
| FilingSummary.xml | 1644 | 2023-09-19 10:14:01 |
| Financial_Report.xlsx | 5689 | 2023-09-19 10:14:01 |
| htld-20230915.htm | 30590 | 2023-09-19 10:14:01 |
| htld-20230915.xsd | 2177 | 2023-09-19 10:14:01 |
| htld-20230915_htm.xml | 2709 | 2023-09-19 10:14:01 |
| htld-20230915_lab.xml | 24453 | 2023-09-19 10:14:01 |
| htld-20230915_pre.xml | 12633 | 2023-09-19 10:14:01 |
| htld2023q3dividendreleasee.htm | 3993 | 2023-09-19 10:14:01 |
| MetaLinks.json | 17281 | 2023-09-19 10:14:01 |
| R1.htm | 38114 | 2023-09-19 10:14:01 |
| report.css | 2767 | 2023-09-19 10:14:01 |
| Show.js | 1084 | 2023-09-19 10:14:01 |