Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000104889-21-000039-index-headers.html | 2021-08-04 08:36:01 | |
| 0000104889-21-000039-index.html | 2021-08-04 08:36:01 | |
| 0000104889-21-000039.txt | 2021-08-04 08:36:01 | |
 0000104889-21-000039-xbrl.zip | 36922 | 2021-08-04 08:36:01 |
| a2021q28-kexhibit991.htm | 536529 | 2021-08-04 08:36:01 |
| FilingSummary.xml | 1640 | 2021-08-04 08:36:01 |
| Financial_Report.xlsx | 5680 | 2021-08-04 08:36:01 |
| ghc-20210804.htm | 40921 | 2021-08-04 08:36:01 |
| ghc-20210804.xsd | 1900 | 2021-08-04 08:36:01 |
| ghc-20210804_htm.xml | 11255 | 2021-08-04 08:36:01 |
| ghc-20210804_lab.xml | 24137 | 2021-08-04 08:36:01 |
| ghc-20210804_pre.xml | 12511 | 2021-08-04 08:36:01 |
| MetaLinks.json | 16677 | 2021-08-04 08:36:01 |
| R1.htm | 38587 | 2021-08-04 08:36:01 |
| report.css | 2767 | 2021-08-04 08:36:01 |
| Show.js | 1084 | 2021-08-04 08:36:01 |