Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-11-000017-index-headers.html | 2011-05-06 16:43:06 | |
| 0000799233-11-000017-index.html | 2011-05-06 16:43:06 | |
| 0000799233-11-000017.txt | 2011-05-06 16:43:06 | |
 0000799233-11-000017-xbrl.zip | 65280 | 2011-05-06 16:43:06 |
| defnref.xml | 23263 | 2011-05-06 16:43:06 |
| exhibit3112011q1.htm | 23664 | 2011-05-06 16:43:06 |
| exhibit3122011q1.htm | 24911 | 2011-05-06 16:43:06 |
| exhibit3212011q1.htm | 7381 | 2011-05-06 16:43:06 |
| exhibit3222011q1.htm | 8261 | 2011-05-06 16:43:06 |
| FilingSummary.xml | 12883 | 2011-05-06 16:43:06 |
| Financial_Report.xls | 218889 | 2011-05-06 16:43:06 |
| htld-20110331.xml | 241879 | 2011-05-06 16:43:06 |
| htld-20110331.xsd | 16551 | 2011-05-06 16:43:06 |
| htld-20110331_cal.xml | 44002 | 2011-05-06 16:43:06 |
| htld-20110331_def.xml | 97326 | 2011-05-06 16:43:06 |
| htld-20110331_lab.xml | 209305 | 2011-05-06 16:43:06 |
| htld-20110331_pre.xml | 117791 | 2011-05-06 16:43:06 |
| htld2011q110q.htm | 580414 | 2011-05-06 16:43:06 |
| R1.xml | 31142 | 2011-05-06 16:43:06 |
| R10.xml | 8830 | 2011-05-06 16:43:06 |
| R11.xml | 10503 | 2011-05-06 16:43:06 |
| R12.xml | 163509 | 2011-05-06 16:43:06 |
| R13.xml | 10316 | 2011-05-06 16:43:06 |
| R14.xml | 7446 | 2011-05-06 16:43:06 |
| R15.xml | 8581 | 2011-05-06 16:43:06 |
| R16.xml | 25601 | 2011-05-06 16:43:06 |
| R17.xml | 8505 | 2011-05-06 16:43:06 |
| R18.xml | 9552 | 2011-05-06 16:43:06 |
| R19.xml | 8403 | 2011-05-06 16:43:06 |
| R2.xml | 124872 | 2011-05-06 16:43:06 |
| R3.xml | 23975 | 2011-05-06 16:43:06 |
| R4.xml | 59021 | 2011-05-06 16:43:06 |
| R5.xml | 42552 | 2011-05-06 16:43:06 |
| R6.xml | 7256 | 2011-05-06 16:43:06 |
| R7.xml | 80658 | 2011-05-06 16:43:06 |
| R8.xml | 10395 | 2011-05-06 16:43:06 |
| R9.xml | 9098 | 2011-05-06 16:43:06 |