Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000104889-21-000020-index-headers.html | 2021-02-25 09:43:44 | |
| 0000104889-21-000020-index.html | 2021-02-25 09:43:44 | |
| 0000104889-21-000020.txt | 2021-02-25 09:43:44 | |
 0000104889-21-000020-xbrl.zip | 14454 | 2021-02-25 09:43:44 |
| a2021-02x25form8xkex991.htm | 6619 | 2021-02-25 09:43:44 |
| FilingSummary.xml | 1724 | 2021-02-25 09:43:44 |
| Financial_Report.xlsx | 5457 | 2021-02-25 09:43:44 |
| ghc-20210223.htm | 43001 | 2021-02-25 09:43:44 |
| ghc-20210223.xsd | 2419 | 2021-02-25 09:43:44 |
| ghc-20210223_cal.xml | 713 | 2021-02-25 09:43:44 |
| ghc-20210223_def.xml | 1650 | 2021-02-25 09:43:44 |
| ghc-20210223_htm.xml | 11261 | 2021-02-25 09:43:44 |
| ghc-20210223_lab.xml | 24275 | 2021-02-25 09:43:44 |
| ghc-20210223_pre.xml | 12649 | 2021-02-25 09:43:44 |
| MetaLinks.json | 17251 | 2021-02-25 09:43:44 |
| R1.htm | 38625 | 2021-02-25 09:43:44 |
| report.css | 2767 | 2021-02-25 09:43:44 |
| Show.js | 1085 | 2021-02-25 09:43:44 |