Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000104889-25-000022-index-headers.html | 2025-02-26 08:20:44 | |
| 0000104889-25-000022-index.html | 2025-02-26 08:20:44 | |
| 0000104889-25-000022.txt | 2025-02-26 08:20:44 | |
 0000104889-25-000022-xbrl.zip | 744257 | 2025-02-26 08:20:44 |
| a2024q410-kex19.htm | 34169 | 2025-02-26 08:20:44 |
| a2024q410-kex21.htm | 363843 | 2025-02-26 08:20:44 |
| a2024q410-kex23.htm | 2058 | 2025-02-26 08:20:44 |
| a2024q410-kex24.htm | 10414 | 2025-02-26 08:20:44 |
| a2024q410-kex311.htm | 8230 | 2025-02-26 08:20:44 |
| a2024q410-kex312.htm | 8146 | 2025-02-26 08:20:44 |
| a2024q410-kex32.htm | 5217 | 2025-02-26 08:20:44 |
| FilingSummary.xml | 77641 | 2025-02-26 08:20:44 |
| Financial_Report.xlsx | 263375 | 2025-02-26 08:20:44 |
| ghc-20241231.htm | 3723473 | 2025-02-26 08:20:44 |
| ghc-20241231.xsd | 138613 | 2025-02-26 08:20:44 |
| ghc-20241231_cal.xml | 202757 | 2025-02-26 08:20:44 |
| ghc-20241231_def.xml | 919285 | 2025-02-26 08:20:44 |
 ghc-20241231_g1.jpg | 50526 | 2025-02-26 08:20:44 |
| ghc-20241231_htm.xml | 4557277 | 2025-02-26 08:20:44 |
| ghc-20241231_lab.xml | 1629040 | 2025-02-26 08:20:44 |
| ghc-20241231_pre.xml | 1240795 | 2025-02-26 08:20:44 |
| MetaLinks.json | 1831253 | 2025-02-26 08:20:44 |
| R1.htm | 66661 | 2025-02-26 08:20:44 |
| R10.htm | 78615 | 2025-02-26 08:20:44 |
| R100.htm | 188877 | 2025-02-26 08:20:44 |
| R101.htm | 51835 | 2025-02-26 08:20:44 |
| R102.htm | 22902 | 2025-02-26 08:20:44 |
| R103.htm | 23985 | 2025-02-26 08:20:44 |
| R104.htm | 22477 | 2025-02-26 08:20:44 |
| R105.htm | 69849 | 2025-02-26 08:20:44 |
| R106.htm | 30492 | 2025-02-26 08:20:44 |
| R107.htm | 25085 | 2025-02-26 08:20:44 |
| R108.htm | 16427 | 2025-02-26 08:20:44 |
| R109.htm | 69060 | 2025-02-26 08:20:44 |
| R11.htm | 43357 | 2025-02-26 08:20:44 |
| R110.htm | 21289 | 2025-02-26 08:20:44 |
| R111.htm | 20542 | 2025-02-26 08:20:44 |
| R112.htm | 65241 | 2025-02-26 08:20:44 |
| R113.htm | 47041 | 2025-02-26 08:20:44 |
| R114.htm | 60164 | 2025-02-26 08:20:44 |
| R115.htm | 18532 | 2025-02-26 08:20:44 |
| R116.htm | 40511 | 2025-02-26 08:20:44 |
| R117.htm | 181992 | 2025-02-26 08:20:44 |
| R12.htm | 30542 | 2025-02-26 08:20:44 |
| R13.htm | 40086 | 2025-02-26 08:20:44 |
| R14.htm | 12375 | 2025-02-26 08:20:44 |
| R15.htm | 16281 | 2025-02-26 08:20:44 |
| R16.htm | 83090 | 2025-02-26 08:20:44 |
| R17.htm | 148851 | 2025-02-26 08:20:44 |
| R18.htm | 124254 | 2025-02-26 08:20:44 |
| R19.htm | 44714 | 2025-02-26 08:20:44 |
| R2.htm | 7824 | 2025-02-26 08:20:44 |
| R20.htm | 92463 | 2025-02-26 08:20:44 |
| R21.htm | 26141 | 2025-02-26 08:20:44 |
| R22.htm | 98587 | 2025-02-26 08:20:44 |
| R23.htm | 289756 | 2025-02-26 08:20:44 |
| R24.htm | 22472 | 2025-02-26 08:20:44 |
| R25.htm | 111131 | 2025-02-26 08:20:44 |
| R26.htm | 15597 | 2025-02-26 08:20:44 |
| R27.htm | 404310 | 2025-02-26 08:20:44 |
| R28.htm | 14670 | 2025-02-26 08:20:44 |
| R29.htm | 8481 | 2025-02-26 08:20:44 |
| R3.htm | 107262 | 2025-02-26 08:20:44 |
| R30.htm | 4387 | 2025-02-26 08:20:44 |
| R31.htm | 47571 | 2025-02-26 08:20:44 |
| R32.htm | 146181 | 2025-02-26 08:20:44 |
| R33.htm | 31803 | 2025-02-26 08:20:44 |
| R34.htm | 21447 | 2025-02-26 08:20:44 |
| R35.htm | 43588 | 2025-02-26 08:20:44 |
| R36.htm | 13311 | 2025-02-26 08:20:44 |
| R37.htm | 14941 | 2025-02-26 08:20:44 |
| R38.htm | 91284 | 2025-02-26 08:20:44 |
| R39.htm | 147264 | 2025-02-26 08:20:44 |
| R4.htm | 74971 | 2025-02-26 08:20:44 |
| R40.htm | 125307 | 2025-02-26 08:20:44 |
| R41.htm | 31504 | 2025-02-26 08:20:44 |
| R42.htm | 87979 | 2025-02-26 08:20:44 |
| R43.htm | 20415 | 2025-02-26 08:20:44 |
| R44.htm | 82452 | 2025-02-26 08:20:44 |
| R45.htm | 302256 | 2025-02-26 08:20:44 |
| R46.htm | 19929 | 2025-02-26 08:20:44 |
| R47.htm | 114526 | 2025-02-26 08:20:44 |
| R48.htm | 385333 | 2025-02-26 08:20:44 |
| R49.htm | 8622 | 2025-02-26 08:20:44 |
| R5.htm | 171206 | 2025-02-26 08:20:44 |
| R50.htm | 125798 | 2025-02-26 08:20:44 |
| R51.htm | 110365 | 2025-02-26 08:20:44 |
| R52.htm | 39879 | 2025-02-26 08:20:44 |
| R53.htm | 7155 | 2025-02-26 08:20:44 |
| R54.htm | 135891 | 2025-02-26 08:20:44 |
| R55.htm | 10311 | 2025-02-26 08:20:44 |
| R56.htm | 9578 | 2025-02-26 08:20:44 |
| R57.htm | 23628 | 2025-02-26 08:20:44 |
| R58.htm | 12240 | 2025-02-26 08:20:44 |
| R59.htm | 10641 | 2025-02-26 08:20:44 |
| R6.htm | 23209 | 2025-02-26 08:20:44 |
| R60.htm | 13357 | 2025-02-26 08:20:44 |
| R61.htm | 17833 | 2025-02-26 08:20:44 |
| R62.htm | 13529 | 2025-02-26 08:20:44 |
| R63.htm | 7141 | 2025-02-26 08:20:44 |
| R64.htm | 21714 | 2025-02-26 08:20:44 |
| R65.htm | 12479 | 2025-02-26 08:20:44 |
| R66.htm | 11891 | 2025-02-26 08:20:44 |
| R67.htm | 19472 | 2025-02-26 08:20:44 |
| R68.htm | 20830 | 2025-02-26 08:20:44 |
| R69.htm | 12102 | 2025-02-26 08:20:44 |
| R7.htm | 126450 | 2025-02-26 08:20:44 |
| R70.htm | 28147 | 2025-02-26 08:20:44 |
| R71.htm | 18846 | 2025-02-26 08:20:44 |
| R72.htm | 29321 | 2025-02-26 08:20:44 |
| R73.htm | 12672 | 2025-02-26 08:20:44 |
| R74.htm | 25738 | 2025-02-26 08:20:44 |
| R75.htm | 70267 | 2025-02-26 08:20:44 |
| R76.htm | 56909 | 2025-02-26 08:20:44 |
| R77.htm | 56223 | 2025-02-26 08:20:44 |
| R78.htm | 12824 | 2025-02-26 08:20:44 |
| R79.htm | 35725 | 2025-02-26 08:20:44 |
| R8.htm | 125875 | 2025-02-26 08:20:44 |
| R80.htm | 27186 | 2025-02-26 08:20:44 |
| R81.htm | 54762 | 2025-02-26 08:20:44 |
| R82.htm | 26577 | 2025-02-26 08:20:44 |
| R83.htm | 10528 | 2025-02-26 08:20:44 |
| R84.htm | 17336 | 2025-02-26 08:20:44 |
| R85.htm | 114753 | 2025-02-26 08:20:44 |
| R86.htm | 74352 | 2025-02-26 08:20:44 |
| R87.htm | 14927 | 2025-02-26 08:20:44 |
| R88.htm | 54733 | 2025-02-26 08:20:44 |
| R89.htm | 28224 | 2025-02-26 08:20:44 |
| R9.htm | 8930 | 2025-02-26 08:20:44 |
| R90.htm | 44940 | 2025-02-26 08:20:44 |
| R91.htm | 12633 | 2025-02-26 08:20:44 |
| R92.htm | 6147 | 2025-02-26 08:20:44 |
| R93.htm | 10261 | 2025-02-26 08:20:44 |
| R94.htm | 145020 | 2025-02-26 08:20:44 |
| R95.htm | 24301 | 2025-02-26 08:20:44 |
| R96.htm | 23752 | 2025-02-26 08:20:44 |
| R97.htm | 32372 | 2025-02-26 08:20:44 |
| R98.htm | 61051 | 2025-02-26 08:20:44 |
| R99.htm | 14788 | 2025-02-26 08:20:44 |
| report.css | 2768 | 2025-02-26 08:20:44 |
| Show.js | 1086 | 2025-02-26 08:20:44 |