Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-20-000048-index-headers.html | 2020-10-19 19:41:02 | |
| 0000799233-20-000048-index.html | 2020-10-19 19:41:02 | |
| 0000799233-20-000048.txt | 2020-10-19 19:41:02 | |
 0000799233-20-000048-xbrl.zip | 24593 | 2020-10-19 19:41:02 |
| FilingSummary.xml | 1729 | 2020-10-19 19:41:02 |
| Financial_Report.xlsx | 5468 | 2020-10-19 19:41:02 |
| htld-20201016.htm | 52972 | 2020-10-19 19:41:02 |
| htld-20201016.xsd | 2447 | 2020-10-19 19:41:02 |
| htld-20201016_cal.xml | 726 | 2020-10-19 19:41:02 |
| htld-20201016_def.xml | 1659 | 2020-10-19 19:41:02 |
| htld-20201016_htm.xml | 11515 | 2020-10-19 19:41:02 |
| htld-20201016_lab.xml | 23970 | 2020-10-19 19:41:02 |
| htld-20201016_pre.xml | 12662 | 2020-10-19 19:41:02 |
| htld2020q3earningsrele.htm | 263798 | 2020-10-19 19:41:02 |
| MetaLinks.json | 17405 | 2020-10-19 19:41:02 |
| R1.htm | 39638 | 2020-10-19 19:41:02 |
| report.css | 2767 | 2020-10-19 19:41:02 |
| Show.js | 1085 | 2020-10-19 19:41:02 |