Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000104889-19-000037-index-headers.html | 2019-10-30 09:20:26 | |
| 0000104889-19-000037-index.html | 2019-10-30 09:20:26 | |
| 0000104889-19-000037.txt | 2019-10-30 09:20:26 | |
 0000104889-19-000037-xbrl.zip | 445645 | 2019-10-30 09:20:26 |
| a2019q310-q.htm | 3244123 | 2019-10-30 09:20:26 |
| a2019q310-q_htm.xml | 4165633 | 2019-10-30 09:20:26 |
| dex101.htm | 57445 | 2019-10-30 09:20:26 |
| dex311.htm | 10411 | 2019-10-30 09:20:26 |
| dex312.htm | 10244 | 2019-10-30 09:20:26 |
| dex32.htm | 6395 | 2019-10-30 09:20:26 |
| FilingSummary.xml | 54751 | 2019-10-30 09:20:26 |
| Financial_Report.xlsx | 125987 | 2019-10-30 09:20:26 |
| ghc-20190930.xsd | 87351 | 2019-10-30 09:20:26 |
| ghc-20190930_cal.xml | 163361 | 2019-10-30 09:20:26 |
| ghc-20190930_def.xml | 556531 | 2019-10-30 09:20:26 |
| ghc-20190930_lab.xml | 1126955 | 2019-10-30 09:20:26 |
| ghc-20190930_pre.xml | 748340 | 2019-10-30 09:20:26 |
| MetaLinks.json | 916708 | 2019-10-30 09:20:26 |
| R1.htm | 53695 | 2019-10-30 09:20:26 |
| R10.htm | 13594 | 2019-10-30 09:20:26 |
| R11.htm | 18548 | 2019-10-30 09:20:26 |
| R12.htm | 43930 | 2019-10-30 09:20:26 |
| R13.htm | 167057 | 2019-10-30 09:20:26 |
| R14.htm | 40521 | 2019-10-30 09:20:26 |
| R15.htm | 56724 | 2019-10-30 09:20:26 |
| R16.htm | 26407 | 2019-10-30 09:20:26 |
| R17.htm | 73073 | 2019-10-30 09:20:26 |
| R18.htm | 91398 | 2019-10-30 09:20:26 |
| R19.htm | 36955 | 2019-10-30 09:20:26 |
| R2.htm | 73057 | 2019-10-30 09:20:26 |
| R20.htm | 159274 | 2019-10-30 09:20:26 |
| R21.htm | 14252 | 2019-10-30 09:20:26 |
| R22.htm | 568644 | 2019-10-30 09:20:26 |
| R23.htm | 30729 | 2019-10-30 09:20:26 |
| R24.htm | 18031 | 2019-10-30 09:20:26 |
| R25.htm | 47496 | 2019-10-30 09:20:26 |
| R26.htm | 29690 | 2019-10-30 09:20:26 |
| R27.htm | 12304 | 2019-10-30 09:20:26 |
| R28.htm | 15771 | 2019-10-30 09:20:26 |
| R29.htm | 44654 | 2019-10-30 09:20:26 |
| R3.htm | 42594 | 2019-10-30 09:20:26 |
| R30.htm | 165095 | 2019-10-30 09:20:26 |
| R31.htm | 21617 | 2019-10-30 09:20:26 |
| R32.htm | 53184 | 2019-10-30 09:20:26 |
| R33.htm | 20052 | 2019-10-30 09:20:26 |
| R34.htm | 71608 | 2019-10-30 09:20:26 |
| R35.htm | 89119 | 2019-10-30 09:20:26 |
| R36.htm | 34009 | 2019-10-30 09:20:26 |
| R37.htm | 163091 | 2019-10-30 09:20:26 |
| R38.htm | 571361 | 2019-10-30 09:20:26 |
| R39.htm | 3935 | 2019-10-30 09:20:26 |
| R4.htm | 112319 | 2019-10-30 09:20:26 |
| R40.htm | 9656 | 2019-10-30 09:20:26 |
| R41.htm | 23190 | 2019-10-30 09:20:26 |
| R42.htm | 76038 | 2019-10-30 09:20:26 |
| R43.htm | 31779 | 2019-10-30 09:20:26 |
| R44.htm | 34761 | 2019-10-30 09:20:26 |
| R45.htm | 9650 | 2019-10-30 09:20:26 |
| R46.htm | 9585 | 2019-10-30 09:20:26 |
| R47.htm | 82709 | 2019-10-30 09:20:26 |
| R48.htm | 9559 | 2019-10-30 09:20:26 |
| R49.htm | 10624 | 2019-10-30 09:20:26 |
| R5.htm | 105399 | 2019-10-30 09:20:26 |
| R50.htm | 5069 | 2019-10-30 09:20:26 |
| R51.htm | 12039 | 2019-10-30 09:20:26 |
| R52.htm | 13775 | 2019-10-30 09:20:26 |
| R53.htm | 18793 | 2019-10-30 09:20:26 |
| R54.htm | 18916 | 2019-10-30 09:20:26 |
| R55.htm | 12430 | 2019-10-30 09:20:26 |
| R56.htm | 19858 | 2019-10-30 09:20:26 |
| R57.htm | 19948 | 2019-10-30 09:20:26 |
| R58.htm | 19585 | 2019-10-30 09:20:26 |
| R59.htm | 4423 | 2019-10-30 09:20:26 |
| R6.htm | 103692 | 2019-10-30 09:20:26 |
| R60.htm | 27849 | 2019-10-30 09:20:26 |
| R61.htm | 53121 | 2019-10-30 09:20:26 |
| R62.htm | 52780 | 2019-10-30 09:20:26 |
| R63.htm | 135374 | 2019-10-30 09:20:26 |
| R64.htm | 32712 | 2019-10-30 09:20:26 |
| R65.htm | 7560 | 2019-10-30 09:20:26 |
| R66.htm | 37965 | 2019-10-30 09:20:26 |
| R67.htm | 28332 | 2019-10-30 09:20:26 |
| R68.htm | 6189 | 2019-10-30 09:20:26 |
| R69.htm | 10163 | 2019-10-30 09:20:26 |
| R7.htm | 25484 | 2019-10-30 09:20:26 |
| R70.htm | 11855 | 2019-10-30 09:20:26 |
| R71.htm | 44729 | 2019-10-30 09:20:26 |
| R72.htm | 4447 | 2019-10-30 09:20:26 |
| R73.htm | 56780 | 2019-10-30 09:20:26 |
| R74.htm | 45445 | 2019-10-30 09:20:26 |
| R75.htm | 14382 | 2019-10-30 09:20:26 |
| R76.htm | 23150 | 2019-10-30 09:20:26 |
| R77.htm | 26199 | 2019-10-30 09:20:26 |
| R78.htm | 48910 | 2019-10-30 09:20:26 |
| R79.htm | 36649 | 2019-10-30 09:20:26 |
| R8.htm | 62316 | 2019-10-30 09:20:26 |
| R80.htm | 48484 | 2019-10-30 09:20:26 |
| R81.htm | 29628 | 2019-10-30 09:20:26 |
| R82.htm | 4459 | 2019-10-30 09:20:26 |
| R83.htm | 151659 | 2019-10-30 09:20:26 |
| R9.htm | 40201 | 2019-10-30 09:20:26 |
| R9999.htm | 6510 | 2019-10-30 09:20:26 |
| report.css | 2767 | 2019-10-30 09:20:26 |
| Show.js | 1085 | 2019-10-30 09:20:26 |