Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-20-000050-index-headers.html | 2020-10-30 12:56:56 | |
| 0000799233-20-000050-index.html | 2020-10-30 12:56:56 | |
| 0000799233-20-000050.txt | 2020-10-30 12:56:56 | |
 0000799233-20-000050-xbrl.zip | 12442 | 2020-10-30 12:56:56 |
| FilingSummary.xml | 1685 | 2020-10-30 12:56:56 |
| Financial_Report.xlsx | 5483 | 2020-10-30 12:56:56 |
| htld-20201028.htm | 37702 | 2020-10-30 12:56:56 |
| htld-20201028.xsd | 2447 | 2020-10-30 12:56:56 |
| htld-20201028_cal.xml | 726 | 2020-10-30 12:56:56 |
| htld-20201028_def.xml | 1659 | 2020-10-30 12:56:56 |
| htld-20201028_htm.xml | 11840 | 2020-10-30 12:56:56 |
| htld-20201028_lab.xml | 23970 | 2020-10-30 12:56:56 |
| htld-20201028_pre.xml | 12662 | 2020-10-30 12:56:56 |
| MetaLinks.json | 17405 | 2020-10-30 12:56:56 |
| R1.htm | 40672 | 2020-10-30 12:56:56 |
| report.css | 2767 | 2020-10-30 12:56:56 |
| Show.js | 1085 | 2020-10-30 12:56:56 |