Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000104889-22-000016-index-headers.html | 2022-05-04 08:37:15 | |
| 0000104889-22-000016-index.html | 2022-05-04 08:37:15 | |
| 0000104889-22-000016.txt | 2022-05-04 08:37:15 | |
 0000104889-22-000016-xbrl.zip | 537621 | 2022-05-04 08:37:15 |
| a2022q110-qex101.htm | 1177997 | 2022-05-04 08:37:15 |
| a2022q110-qex311.htm | 9578 | 2022-05-04 08:37:15 |
| a2022q110-qex312.htm | 9490 | 2022-05-04 08:37:15 |
| a2022q110-qex32.htm | 5471 | 2022-05-04 08:37:15 |
| FilingSummary.xml | 48629 | 2022-05-04 08:37:15 |
| Financial_Report.xlsx | 112351 | 2022-05-04 08:37:15 |
| ghc-20220331.htm | 2153216 | 2022-05-04 08:37:15 |
| ghc-20220331.xsd | 82191 | 2022-05-04 08:37:15 |
| ghc-20220331_cal.xml | 127830 | 2022-05-04 08:37:15 |
| ghc-20220331_def.xml | 574307 | 2022-05-04 08:37:15 |
| ghc-20220331_htm.xml | 2481982 | 2022-05-04 08:37:15 |
| ghc-20220331_lab.xml | 974157 | 2022-05-04 08:37:15 |
| ghc-20220331_pre.xml | 725448 | 2022-05-04 08:37:15 |
| MetaLinks.json | 976906 | 2022-05-04 08:37:15 |
| R1.htm | 53818 | 2022-05-04 08:37:15 |
| R10.htm | 24065 | 2022-05-04 08:37:15 |
| R11.htm | 18108 | 2022-05-04 08:37:15 |
| R12.htm | 15646 | 2022-05-04 08:37:15 |
| R13.htm | 106404 | 2022-05-04 08:37:15 |
| R14.htm | 32940 | 2022-05-04 08:37:15 |
| R15.htm | 81143 | 2022-05-04 08:37:15 |
| R16.htm | 22865 | 2022-05-04 08:37:15 |
| R17.htm | 35636 | 2022-05-04 08:37:15 |
| R18.htm | 51937 | 2022-05-04 08:37:15 |
| R19.htm | 17329 | 2022-05-04 08:37:15 |
| R2.htm | 101589 | 2022-05-04 08:37:15 |
| R20.htm | 80577 | 2022-05-04 08:37:15 |
| R21.htm | 10860 | 2022-05-04 08:37:15 |
| R22.htm | 238973 | 2022-05-04 08:37:15 |
| R23.htm | 11235 | 2022-05-04 08:37:15 |
| R24.htm | 23049 | 2022-05-04 08:37:15 |
| R25.htm | 19629 | 2022-05-04 08:37:15 |
| R26.htm | 20090 | 2022-05-04 08:37:15 |
| R27.htm | 13474 | 2022-05-04 08:37:15 |
| R28.htm | 107921 | 2022-05-04 08:37:15 |
| R29.htm | 25567 | 2022-05-04 08:37:15 |
| R3.htm | 58720 | 2022-05-04 08:37:15 |
| R30.htm | 82483 | 2022-05-04 08:37:15 |
| R31.htm | 17150 | 2022-05-04 08:37:15 |
| R32.htm | 35917 | 2022-05-04 08:37:15 |
| R33.htm | 49516 | 2022-05-04 08:37:15 |
| R34.htm | 16473 | 2022-05-04 08:37:15 |
| R35.htm | 84023 | 2022-05-04 08:37:15 |
| R36.htm | 194582 | 2022-05-04 08:37:15 |
| R37.htm | 3940 | 2022-05-04 08:37:15 |
| R38.htm | 43306 | 2022-05-04 08:37:15 |
| R39.htm | 10167 | 2022-05-04 08:37:15 |
| R4.htm | 159890 | 2022-05-04 08:37:15 |
| R40.htm | 35656 | 2022-05-04 08:37:15 |
| R41.htm | 7431 | 2022-05-04 08:37:15 |
| R42.htm | 73525 | 2022-05-04 08:37:15 |
| R43.htm | 9605 | 2022-05-04 08:37:15 |
| R44.htm | 9194 | 2022-05-04 08:37:15 |
| R45.htm | 7651 | 2022-05-04 08:37:15 |
| R46.htm | 23118 | 2022-05-04 08:37:15 |
| R47.htm | 25282 | 2022-05-04 08:37:15 |
| R48.htm | 13815 | 2022-05-04 08:37:15 |
| R49.htm | 22430 | 2022-05-04 08:37:15 |
| R5.htm | 5411 | 2022-05-04 08:37:15 |
| R50.htm | 50941 | 2022-05-04 08:37:15 |
| R51.htm | 55417 | 2022-05-04 08:37:15 |
| R52.htm | 66952 | 2022-05-04 08:37:15 |
| R53.htm | 56996 | 2022-05-04 08:37:15 |
| R54.htm | 6998 | 2022-05-04 08:37:15 |
| R55.htm | 42939 | 2022-05-04 08:37:15 |
| R56.htm | 25303 | 2022-05-04 08:37:15 |
| R57.htm | 37569 | 2022-05-04 08:37:15 |
| R58.htm | 12826 | 2022-05-04 08:37:15 |
| R59.htm | 6208 | 2022-05-04 08:37:15 |
| R6.htm | 109172 | 2022-05-04 08:37:15 |
| R60.htm | 9872 | 2022-05-04 08:37:15 |
| R61.htm | 8956 | 2022-05-04 08:37:15 |
| R62.htm | 60320 | 2022-05-04 08:37:15 |
| R63.htm | 6773 | 2022-05-04 08:37:15 |
| R64.htm | 46270 | 2022-05-04 08:37:15 |
| R65.htm | 30610 | 2022-05-04 08:37:15 |
| R66.htm | 16545 | 2022-05-04 08:37:15 |
| R67.htm | 7621 | 2022-05-04 08:37:15 |
| R68.htm | 18245 | 2022-05-04 08:37:15 |
| R69.htm | 49720 | 2022-05-04 08:37:15 |
| R7.htm | 76192 | 2022-05-04 08:37:15 |
| R70.htm | 40340 | 2022-05-04 08:37:15 |
| R71.htm | 49653 | 2022-05-04 08:37:15 |
| R72.htm | 30105 | 2022-05-04 08:37:15 |
| R73.htm | 4718 | 2022-05-04 08:37:15 |
| R74.htm | 118401 | 2022-05-04 08:37:15 |
| R8.htm | 11666 | 2022-05-04 08:37:15 |
| R9.htm | 27534 | 2022-05-04 08:37:15 |
| report.css | 2767 | 2022-05-04 08:37:15 |
| Show.js | 1085 | 2022-05-04 08:37:15 |