Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-21-000046-index-headers.html | 2021-09-02 10:05:14 | |
| 0000799233-21-000046-index.html | 2021-09-02 10:05:14 | |
| 0000799233-21-000046.txt | 2021-09-02 10:05:14 | |
 0000799233-21-000046-xbrl.zip | 11352 | 2021-09-02 10:05:14 |
| FilingSummary.xml | 1616 | 2021-09-02 10:05:14 |
| Financial_Report.xlsx | 5694 | 2021-09-02 10:05:14 |
| htld-20210831.htm | 37155 | 2021-09-02 10:05:14 |
| htld-20210831.xsd | 2175 | 2021-09-02 10:05:14 |
| htld-20210831_htm.xml | 11081 | 2021-09-02 10:05:14 |
| htld-20210831_lab.xml | 24451 | 2021-09-02 10:05:14 |
| htld-20210831_pre.xml | 12631 | 2021-09-02 10:05:14 |
| MetaLinks.json | 17014 | 2021-09-02 10:05:14 |
| R1.htm | 39631 | 2021-09-02 10:05:14 |
| report.css | 2766 | 2021-09-02 10:05:14 |
| Show.js | 1084 | 2021-09-02 10:05:14 |