Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-16-000078-index-headers.html | 2016-08-09 16:54:43 | |
| 0000799233-16-000078-index.html | 2016-08-09 16:54:43 | |
| 0000799233-16-000078.txt | 2016-08-09 16:54:43 | |
 0000799233-16-000078-xbrl.zip | 113222 | 2016-08-09 16:54:43 |
| exhibit3112016q2.htm | 23572 | 2016-08-09 16:54:43 |
| exhibit3122016q2.htm | 24714 | 2016-08-09 16:54:43 |
| exhibit3212016q2.htm | 9716 | 2016-08-09 16:54:43 |
| exhibit3222016q2.htm | 10603 | 2016-08-09 16:54:43 |
| FilingSummary.xml | 24676 | 2016-08-09 16:54:43 |
| Financial_Report.xlsx | 49070 | 2016-08-09 16:54:43 |
| htld-20160630.xml | 577699 | 2016-08-09 16:54:43 |
| htld-20160630.xsd | 32232 | 2016-08-09 16:54:43 |
| htld-20160630_cal.xml | 57892 | 2016-08-09 16:54:43 |
| htld-20160630_def.xml | 85914 | 2016-08-09 16:54:43 |
| htld-20160630_lab.xml | 435853 | 2016-08-09 16:54:43 |
| htld-20160630_pre.xml | 229241 | 2016-08-09 16:54:43 |
| htld2016q210q.htm | 801659 | 2016-08-09 16:54:43 |
| R1.htm | 20523 | 2016-08-09 16:54:43 |
| R10.htm | 5427 | 2016-08-09 16:54:43 |
| R11.htm | 7642 | 2016-08-09 16:54:43 |
| R12.htm | 8653 | 2016-08-09 16:54:43 |
| R13.htm | 34179 | 2016-08-09 16:54:43 |
| R14.htm | 52793 | 2016-08-09 16:54:43 |
| R15.htm | 13261 | 2016-08-09 16:54:43 |
| R16.htm | 56503 | 2016-08-09 16:54:43 |
| R17.htm | 9084 | 2016-08-09 16:54:43 |
| R18.htm | 26034 | 2016-08-09 16:54:43 |
| R19.htm | 11293 | 2016-08-09 16:54:43 |
| R2.htm | 103000 | 2016-08-09 16:54:43 |
| R20.htm | 37888 | 2016-08-09 16:54:43 |
| R21.htm | 6886 | 2016-08-09 16:54:43 |
| R22.htm | 5040 | 2016-08-09 16:54:43 |
| R23.htm | 49454 | 2016-08-09 16:54:43 |
| R24.htm | 30676 | 2016-08-09 16:54:43 |
| R25.htm | 49969 | 2016-08-09 16:54:43 |
| R26.htm | 49506 | 2016-08-09 16:54:43 |
| R27.htm | 12789 | 2016-08-09 16:54:43 |
| R28.htm | 33906 | 2016-08-09 16:54:43 |
| R29.htm | 4236 | 2016-08-09 16:54:43 |
| R3.htm | 20938 | 2016-08-09 16:54:43 |
| R30.htm | 7045 | 2016-08-09 16:54:43 |
| R31.htm | 14643 | 2016-08-09 16:54:43 |
| R32.htm | 31241 | 2016-08-09 16:54:43 |
| R33.htm | 7071 | 2016-08-09 16:54:43 |
| R34.htm | 25995 | 2016-08-09 16:54:43 |
| R35.htm | 11013 | 2016-08-09 16:54:43 |
| R36.htm | 4710 | 2016-08-09 16:54:43 |
| R37.htm | 54897 | 2016-08-09 16:54:43 |
| R38.htm | 24199 | 2016-08-09 16:54:43 |
| R39.htm | 42818 | 2016-08-09 16:54:43 |
| R4.htm | 65961 | 2016-08-09 16:54:43 |
| R40.htm | 12447 | 2016-08-09 16:54:43 |
| R41.htm | 25290 | 2016-08-09 16:54:43 |
| R42.htm | 4529 | 2016-08-09 16:54:43 |
| R5.htm | 20581 | 2016-08-09 16:54:43 |
| R6.htm | 3209 | 2016-08-09 16:54:43 |
| R7.htm | 76038 | 2016-08-09 16:54:43 |
| R8.htm | 13634 | 2016-08-09 16:54:43 |
| R9.htm | 6877 | 2016-08-09 16:54:43 |
| report.css | 2767 | 2016-08-09 16:54:43 |
| Show.js | 1410 | 2016-08-09 16:54:43 |