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| 0000104889-22-000015.txt | 2022-05-04 08:33:15 | |
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| a2022q18-kexhibit991.htm | 382083 | 2022-05-04 08:33:15 |
| FilingSummary.xml | 1651 | 2022-05-04 08:33:15 |
| Financial_Report.xlsx | 5678 | 2022-05-04 08:33:15 |
| ghc-20220504.htm | 41001 | 2022-05-04 08:33:15 |
| ghc-20220504.xsd | 1900 | 2022-05-04 08:33:15 |
| ghc-20220504_htm.xml | 11342 | 2022-05-04 08:33:15 |
| ghc-20220504_lab.xml | 24137 | 2022-05-04 08:33:15 |
| ghc-20220504_pre.xml | 12511 | 2022-05-04 08:33:15 |
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| R1.htm | 38717 | 2022-05-04 08:33:15 |
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| Show.js | 1084 | 2022-05-04 08:33:15 |