Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-20-000046-index-headers.html | 2020-09-11 16:03:41 | |
| 0000799233-20-000046-index.html | 2020-09-11 16:03:41 | |
| 0000799233-20-000046.txt | 2020-09-11 16:03:41 | |
 0000799233-20-000046-xbrl.zip | 14434 | 2020-09-11 16:03:41 |
| dividend8k2020q3.htm | 47367 | 2020-09-11 16:03:41 |
| dividend8k2020q3_htm.xml | 4217 | 2020-09-11 16:03:41 |
| FilingSummary.xml | 1752 | 2020-09-11 16:03:41 |
| Financial_Report.xlsx | 5452 | 2020-09-11 16:03:41 |
| htld-20200911.xsd | 4706 | 2020-09-11 16:03:41 |
| htld-20200911_cal.xml | 636 | 2020-09-11 16:03:41 |
| htld-20200911_def.xml | 1486 | 2020-09-11 16:03:41 |
| htld-20200911_lab.xml | 26457 | 2020-09-11 16:03:41 |
| htld-20200911_pre.xml | 13681 | 2020-09-11 16:03:41 |
| MetaLinks.json | 18528 | 2020-09-11 16:03:41 |
| q32020dividendpressrel.htm | 5911 | 2020-09-11 16:03:41 |
| R1.htm | 38639 | 2020-09-11 16:03:41 |
| report.css | 2767 | 2020-09-11 16:03:41 |
| Show.js | 1085 | 2020-09-11 16:03:41 |