Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001104659-19-061125-index-headers.html | 2019-11-07 16:17:20 | |
| 0001104659-19-061125-index.html | 2019-11-07 16:17:20 | |
| 0001104659-19-061125.txt | 2019-11-07 16:17:20 | |
 0001104659-19-061125-xbrl.zip | 229982 | 2019-11-07 16:17:20 |
| a19-17613_110q.htm | 1804244 | 2019-11-07 16:17:20 |
| a19-17613_1ex31d1.htm | 13284 | 2019-11-07 16:17:20 |
| a19-17613_1ex31d2.htm | 13321 | 2019-11-07 16:17:20 |
| a19-17613_1ex32.htm | 6797 | 2019-11-07 16:17:20 |
| FilingSummary.xml | 52555 | 2019-11-07 16:17:20 |
| Financial_Report.xlsx | 106923 | 2019-11-07 16:17:20 |
| hgr-20190930.xml | 3856857 | 2019-11-07 16:17:20 |
| hgr-20190930.xsd | 73954 | 2019-11-07 16:17:20 |
| hgr-20190930_cal.xml | 133727 | 2019-11-07 16:17:20 |
| hgr-20190930_def.xml | 201504 | 2019-11-07 16:17:20 |
| hgr-20190930_lab.xml | 640974 | 2019-11-07 16:17:20 |
| hgr-20190930_pre.xml | 485465 | 2019-11-07 16:17:20 |
| R1.htm | 27699 | 2019-11-07 16:17:20 |
| R10.htm | 65704 | 2019-11-07 16:17:20 |
| R11.htm | 85073 | 2019-11-07 16:17:20 |
| R12.htm | 77348 | 2019-11-07 16:17:20 |
| R13.htm | 22135 | 2019-11-07 16:17:20 |
| R14.htm | 38677 | 2019-11-07 16:17:20 |
| R15.htm | 59327 | 2019-11-07 16:17:20 |
| R16.htm | 240298 | 2019-11-07 16:17:20 |
| R17.htm | 62566 | 2019-11-07 16:17:20 |
| R18.htm | 60381 | 2019-11-07 16:17:20 |
| R19.htm | 7133 | 2019-11-07 16:17:20 |
| R2.htm | 80993 | 2019-11-07 16:17:20 |
| R20.htm | 165915 | 2019-11-07 16:17:20 |
| R21.htm | 69810 | 2019-11-07 16:17:20 |
| R22.htm | 9592 | 2019-11-07 16:17:20 |
| R23.htm | 67612 | 2019-11-07 16:17:20 |
| R24.htm | 7733 | 2019-11-07 16:17:20 |
| R25.htm | 57426 | 2019-11-07 16:17:20 |
| R26.htm | 18321 | 2019-11-07 16:17:20 |
| R27.htm | 305108 | 2019-11-07 16:17:20 |
| R28.htm | 58841 | 2019-11-07 16:17:20 |
| R29.htm | 5491 | 2019-11-07 16:17:20 |
| R3.htm | 13029 | 2019-11-07 16:17:20 |
| R30.htm | 233893 | 2019-11-07 16:17:20 |
| R31.htm | 105958 | 2019-11-07 16:17:20 |
| R32.htm | 63970 | 2019-11-07 16:17:20 |
| R33.htm | 84631 | 2019-11-07 16:17:20 |
| R34.htm | 73416 | 2019-11-07 16:17:20 |
| R35.htm | 22667 | 2019-11-07 16:17:20 |
| R36.htm | 37843 | 2019-11-07 16:17:20 |
| R37.htm | 50353 | 2019-11-07 16:17:20 |
| R38.htm | 242693 | 2019-11-07 16:17:20 |
| R39.htm | 63753 | 2019-11-07 16:17:20 |
| R4.htm | 51134 | 2019-11-07 16:17:20 |
| R40.htm | 61280 | 2019-11-07 16:17:20 |
| R41.htm | 172260 | 2019-11-07 16:17:20 |
| R42.htm | 63545 | 2019-11-07 16:17:20 |
| R43.htm | 65688 | 2019-11-07 16:17:20 |
| R44.htm | 54433 | 2019-11-07 16:17:20 |
| R45.htm | 299022 | 2019-11-07 16:17:20 |
| R46.htm | 58120 | 2019-11-07 16:17:20 |
| R47.htm | 4762 | 2019-11-07 16:17:20 |
| R48.htm | 82880 | 2019-11-07 16:17:20 |
| R49.htm | 31730 | 2019-11-07 16:17:20 |
| R5.htm | 19396 | 2019-11-07 16:17:20 |
| R50.htm | 30057 | 2019-11-07 16:17:20 |
| R51.htm | 24032 | 2019-11-07 16:17:20 |
| R52.htm | 12031 | 2019-11-07 16:17:20 |
| R53.htm | 32203 | 2019-11-07 16:17:20 |
| R54.htm | 81766 | 2019-11-07 16:17:20 |
| R55.htm | 25373 | 2019-11-07 16:17:20 |
| R56.htm | 36756 | 2019-11-07 16:17:20 |
| R57.htm | 17017 | 2019-11-07 16:17:20 |
| R58.htm | 21910 | 2019-11-07 16:17:20 |
| R59.htm | 18177 | 2019-11-07 16:17:20 |
| R6.htm | 7194 | 2019-11-07 16:17:20 |
| R60.htm | 21803 | 2019-11-07 16:17:20 |
| R61.htm | 18621 | 2019-11-07 16:17:20 |
| R62.htm | 10588 | 2019-11-07 16:17:20 |
| R63.htm | 17201 | 2019-11-07 16:17:20 |
| R64.htm | 19673 | 2019-11-07 16:17:20 |
| R65.htm | 52980 | 2019-11-07 16:17:20 |
| R66.htm | 11221 | 2019-11-07 16:17:20 |
| R67.htm | 13332 | 2019-11-07 16:17:20 |
| R68.htm | 45454 | 2019-11-07 16:17:20 |
| R69.htm | 22180 | 2019-11-07 16:17:20 |
| R7.htm | 76405 | 2019-11-07 16:17:20 |
| R70.htm | 50940 | 2019-11-07 16:17:20 |
| R71.htm | 11267 | 2019-11-07 16:17:20 |
| R72.htm | 24916 | 2019-11-07 16:17:20 |
| R73.htm | 29581 | 2019-11-07 16:17:20 |
| R74.htm | 7197 | 2019-11-07 16:17:20 |
| R75.htm | 13268 | 2019-11-07 16:17:20 |
| R76.htm | 9878 | 2019-11-07 16:17:20 |
| R77.htm | 38016 | 2019-11-07 16:17:20 |
| R78.htm | 28878 | 2019-11-07 16:17:20 |
| R79.htm | 7842 | 2019-11-07 16:17:20 |
| R8.htm | 90285 | 2019-11-07 16:17:20 |
| R80.htm | 4013 | 2019-11-07 16:17:20 |
| R81.htm | 8535 | 2019-11-07 16:17:20 |
| R82.htm | 32716 | 2019-11-07 16:17:20 |
| R83.htm | 47486 | 2019-11-07 16:17:20 |
| R84.htm | 36201 | 2019-11-07 16:17:20 |
| R85.htm | 14390 | 2019-11-07 16:17:20 |
| R9.htm | 122232 | 2019-11-07 16:17:20 |
| report.css | 2767 | 2019-11-07 16:17:20 |
| Show.js | 1085 | 2019-11-07 16:17:20 |