Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-13-000013-index-headers.html | 2013-02-28 17:46:02 | |
| 0000799233-13-000013-index.html | 2013-02-28 17:46:02 | |
| 0000799233-13-000013.txt | 2013-02-28 17:46:02 | |
 0000799233-13-000013-xbrl.zip | 168315 | 2013-02-28 17:46:02 |
| a2012exhibitno21.htm | 7387 | 2013-02-28 17:46:02 |
| exhibit3112012q4.htm | 23584 | 2013-02-28 17:46:02 |
| exhibit3122012q4.htm | 24731 | 2013-02-28 17:46:02 |
| exhibit3212012q4.htm | 9730 | 2013-02-28 17:46:02 |
| exhibit3222012q4.htm | 10617 | 2013-02-28 17:46:02 |
| FilingSummary.xml | 28027 | 2013-02-28 17:46:02 |
| Financial_Report.xls | 925860 | 2013-02-28 17:46:02 |
| htld-20121231.xml | 1052708 | 2013-02-28 17:46:02 |
| htld-20121231.xsd | 43826 | 2013-02-28 17:46:02 |
| htld-20121231_cal.xml | 78417 | 2013-02-28 17:46:02 |
| htld-20121231_def.xml | 231785 | 2013-02-28 17:46:02 |
| htld-20121231_lab.xml | 577534 | 2013-02-28 17:46:02 |
| htld-20121231_pre.xml | 321362 | 2013-02-28 17:46:02 |
| htld2012q410k.htm | 1460584 | 2013-02-28 17:46:02 |
| R1.htm | 37282 | 2013-02-28 17:46:02 |
| R10.htm | 101297 | 2013-02-28 17:46:02 |
| R11.htm | 126085 | 2013-02-28 17:46:02 |
| R12.htm | 10558 | 2013-02-28 17:46:02 |
| R13.htm | 19546 | 2013-02-28 17:46:02 |
| R14.htm | 37720 | 2013-02-28 17:46:02 |
| R15.htm | 6946 | 2013-02-28 17:46:02 |
| R16.htm | 9301 | 2013-02-28 17:46:02 |
| R17.htm | 56758 | 2013-02-28 17:46:02 |
| R18.htm | 5594 | 2013-02-28 17:46:02 |
| R19.htm | 36422 | 2013-02-28 17:46:02 |
| R2.htm | 146242 | 2013-02-28 17:46:02 |
| R20.htm | 154029 | 2013-02-28 17:46:02 |
| R21.htm | 35278 | 2013-02-28 17:46:02 |
| R22.htm | 81803 | 2013-02-28 17:46:02 |
| R23.htm | 121037 | 2013-02-28 17:46:02 |
| R24.htm | 29981 | 2013-02-28 17:46:02 |
| R25.htm | 54722 | 2013-02-28 17:46:02 |
| R26.htm | 9050 | 2013-02-28 17:46:02 |
| R27.htm | 6199 | 2013-02-28 17:46:02 |
| R28.htm | 13993 | 2013-02-28 17:46:02 |
| R29.htm | 8189 | 2013-02-28 17:46:02 |
| R3.htm | 26250 | 2013-02-28 17:46:02 |
| R30.htm | 25796 | 2013-02-28 17:46:02 |
| R31.htm | 5981 | 2013-02-28 17:46:02 |
| R32.htm | 5086 | 2013-02-28 17:46:02 |
| R33.htm | 5223 | 2013-02-28 17:46:02 |
| R34.htm | 6423 | 2013-02-28 17:46:02 |
| R35.htm | 45477 | 2013-02-28 17:46:02 |
| R36.htm | 4994 | 2013-02-28 17:46:02 |
| R37.htm | 14318 | 2013-02-28 17:46:02 |
| R38.htm | 125220 | 2013-02-28 17:46:02 |
| R39.htm | 53965 | 2013-02-28 17:46:02 |
| R4.htm | 98556 | 2013-02-28 17:46:02 |
| R40.htm | 22161 | 2013-02-28 17:46:02 |
| R41.htm | 37830 | 2013-02-28 17:46:02 |
| R42.htm | 13140 | 2013-02-28 17:46:02 |
| R43.htm | 59828 | 2013-02-28 17:46:02 |
| R44.htm | 15551 | 2013-02-28 17:46:02 |
| R45.htm | 15565 | 2013-02-28 17:46:02 |
| R46.htm | 7213 | 2013-02-28 17:46:02 |
| R47.htm | 53713 | 2013-02-28 17:46:02 |
| R48.htm | 6116 | 2013-02-28 17:46:02 |
| R49.htm | 5846 | 2013-02-28 17:46:02 |
| R5.htm | 35729 | 2013-02-28 17:46:02 |
| R50.htm | 32810 | 2013-02-28 17:46:02 |
| R51.htm | 14729 | 2013-02-28 17:46:02 |
| R6.htm | 3842 | 2013-02-28 17:46:02 |
| R7.htm | 112432 | 2013-02-28 17:46:02 |
| R8.htm | 73292 | 2013-02-28 17:46:02 |
| R9.htm | 12782 | 2013-02-28 17:46:02 |
| report.css | 2721 | 2013-02-28 17:46:02 |
| Show.js | 6423 | 2013-02-28 17:46:02 |