Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000104889-21-000016-index-headers.html | 2021-02-24 08:36:17 | |
| 0000104889-21-000016-index.html | 2021-02-24 08:36:17 | |
| 0000104889-21-000016.txt | 2021-02-24 08:36:17 | |
 0000104889-21-000016-xbrl.zip | 43158 | 2021-02-24 08:36:17 |
| a2020q48-kexhibit991.htm | 600113 | 2021-02-24 08:36:17 |
| FilingSummary.xml | 1721 | 2021-02-24 08:36:17 |
| Financial_Report.xlsx | 5456 | 2021-02-24 08:36:17 |
| ghc-20210224.htm | 41243 | 2021-02-24 08:36:17 |
| ghc-20210224.xsd | 2419 | 2021-02-24 08:36:17 |
| ghc-20210224_cal.xml | 713 | 2021-02-24 08:36:17 |
| ghc-20210224_def.xml | 1650 | 2021-02-24 08:36:17 |
| ghc-20210224_htm.xml | 11274 | 2021-02-24 08:36:17 |
| ghc-20210224_lab.xml | 24275 | 2021-02-24 08:36:17 |
| ghc-20210224_pre.xml | 12649 | 2021-02-24 08:36:17 |
| MetaLinks.json | 17251 | 2021-02-24 08:36:17 |
| R1.htm | 38625 | 2021-02-24 08:36:17 |
| report.css | 2767 | 2021-02-24 08:36:17 |
| Show.js | 1085 | 2021-02-24 08:36:17 |