Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000104889-20-000084-index-headers.html | 2020-12-15 17:33:41 | |
| 0000104889-20-000084-index.html | 2020-12-15 17:33:41 | |
| 0000104889-20-000084.txt | 2020-12-15 17:33:41 | |
 0000104889-20-000084-xbrl.zip | 18016 | 2020-12-15 17:33:41 |
| a2020-12x15form8xkex101.htm | 25802 | 2020-12-15 17:33:41 |
| FilingSummary.xml | 1724 | 2020-12-15 17:33:41 |
| Financial_Report.xlsx | 5456 | 2020-12-15 17:33:41 |
| ghc-20201210.htm | 43740 | 2020-12-15 17:33:41 |
| ghc-20201210.xsd | 2419 | 2020-12-15 17:33:41 |
| ghc-20201210_cal.xml | 713 | 2020-12-15 17:33:41 |
| ghc-20201210_def.xml | 1650 | 2020-12-15 17:33:41 |
| ghc-20201210_htm.xml | 11261 | 2020-12-15 17:33:41 |
| ghc-20201210_lab.xml | 24275 | 2020-12-15 17:33:41 |
| ghc-20201210_pre.xml | 12649 | 2020-12-15 17:33:41 |
| MetaLinks.json | 17251 | 2020-12-15 17:33:41 |
| R1.htm | 38625 | 2020-12-15 17:33:41 |
| report.css | 2767 | 2020-12-15 17:33:41 |
| Show.js | 1085 | 2020-12-15 17:33:41 |