Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-20-000031-index-headers.html | 2020-06-09 13:08:45 | |
| 0000799233-20-000031-index.html | 2020-06-09 13:08:45 | |
| 0000799233-20-000031.txt | 2020-06-09 13:08:45 | |
 0000799233-20-000031-xbrl.zip | 14421 | 2020-06-09 13:08:45 |
| dividend8k2020q2.htm | 47501 | 2020-06-09 13:08:45 |
| dividend8k2020q2_htm.xml | 4375 | 2020-06-09 13:08:45 |
| FilingSummary.xml | 1752 | 2020-06-09 13:08:45 |
| Financial_Report.xlsx | 5797 | 2020-06-09 13:08:45 |
| htld-20200609.xsd | 4706 | 2020-06-09 13:08:45 |
| htld-20200609_cal.xml | 636 | 2020-06-09 13:08:45 |
| htld-20200609_def.xml | 1486 | 2020-06-09 13:08:45 |
| htld-20200609_lab.xml | 26457 | 2020-06-09 13:08:45 |
| htld-20200609_pre.xml | 13681 | 2020-06-09 13:08:45 |
| MetaLinks.json | 18540 | 2020-06-09 13:08:45 |
| q22020dividendpressrel.htm | 5635 | 2020-06-09 13:08:45 |
| R1.htm | 38636 | 2020-06-09 13:08:45 |
| report.css | 2767 | 2020-06-09 13:08:45 |
| Show.js | 1084 | 2020-06-09 13:08:45 |