Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-20-000011-index-headers.html | 2020-03-10 13:26:19 | |
| 0000799233-20-000011-index.html | 2020-03-10 13:26:19 | |
| 0000799233-20-000011.txt | 2020-03-10 13:26:19 | |
 0000799233-20-000011-xbrl.zip | 13875 | 2020-03-10 13:26:19 |
| dividend8k2020q1.htm | 47371 | 2020-03-10 13:26:19 |
| dividend8k2020q1_htm.xml | 4237 | 2020-03-10 13:26:19 |
| FilingSummary.xml | 1752 | 2020-03-10 13:26:19 |
| Financial_Report.xlsx | 5793 | 2020-03-10 13:26:19 |
| htld-20200310.xsd | 4706 | 2020-03-10 13:26:19 |
| htld-20200310_cal.xml | 636 | 2020-03-10 13:26:19 |
| htld-20200310_def.xml | 1486 | 2020-03-10 13:26:19 |
| htld-20200310_lab.xml | 26457 | 2020-03-10 13:26:19 |
| htld-20200310_pre.xml | 13681 | 2020-03-10 13:26:19 |
| MetaLinks.json | 18528 | 2020-03-10 13:26:19 |
| q12020dividendpressrel.htm | 5673 | 2020-03-10 13:26:19 |
| R1.htm | 38635 | 2020-03-10 13:26:19 |
| report.css | 2767 | 2020-03-10 13:26:19 |
| Show.js | 1085 | 2020-03-10 13:26:19 |