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| 0001628280-26-028610.txt | 2026-04-30 08:31:42 | |
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| FilingSummary.xml | 1626 | 2026-04-30 08:31:42 |
| ghc-20260430.htm | 32524 | 2026-04-30 08:31:42 |
| ghc-20260430.xsd | 1783 | 2026-04-30 08:31:42 |
| ghc-20260430_htm.xml | 2729 | 2026-04-30 08:31:42 |
| ghc-20260430_lab.xml | 21885 | 2026-04-30 08:31:42 |
| ghc-20260430_pre.xml | 12513 | 2026-04-30 08:31:42 |
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| R1.htm | 38088 | 2026-04-30 08:31:42 |
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| Show.js | 1084 | 2026-04-30 08:31:42 |