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| 0000104889-23-000036.txt | 2023-05-05 13:47:52 | |
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| a2023-05x05form8xkex991.htm | 3327 | 2023-05-05 13:47:52 |
| FilingSummary.xml | 1654 | 2023-05-05 13:47:52 |
| Financial_Report.xlsx | 5698 | 2023-05-05 13:47:52 |
| ghc-20230504.htm | 62444 | 2023-05-05 13:47:52 |
| ghc-20230504.xsd | 1900 | 2023-05-05 13:47:52 |
| ghc-20230504_htm.xml | 11373 | 2023-05-05 13:47:52 |
| ghc-20230504_lab.xml | 24137 | 2023-05-05 13:47:52 |
| ghc-20230504_pre.xml | 12511 | 2023-05-05 13:47:52 |
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| Show.js | 1084 | 2023-05-05 13:47:52 |