Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000104889-21-000032-index-headers.html | 2021-05-10 10:58:16 | |
| 0000104889-21-000032-index.html | 2021-05-10 10:58:16 | |
| 0000104889-21-000032.txt | 2021-05-10 10:58:16 | |
 0000104889-21-000032-xbrl.zip | 12554 | 2021-05-10 10:58:16 |
| FilingSummary.xml | 1679 | 2021-05-10 10:58:16 |
| Financial_Report.xlsx | 5677 | 2021-05-10 10:58:16 |
| ghc-20210506.htm | 57079 | 2021-05-10 10:58:16 |
| ghc-20210506.xsd | 2419 | 2021-05-10 10:58:16 |
| ghc-20210506_cal.xml | 713 | 2021-05-10 10:58:16 |
| ghc-20210506_def.xml | 1650 | 2021-05-10 10:58:16 |
| ghc-20210506_htm.xml | 11261 | 2021-05-10 10:58:16 |
| ghc-20210506_lab.xml | 24275 | 2021-05-10 10:58:16 |
| ghc-20210506_pre.xml | 12649 | 2021-05-10 10:58:16 |
| MetaLinks.json | 17251 | 2021-05-10 10:58:16 |
| R1.htm | 38624 | 2021-05-10 10:58:16 |
| report.css | 2767 | 2021-05-10 10:58:16 |
| Show.js | 1085 | 2021-05-10 10:58:16 |