Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000104889-21-000036-index-headers.html | 2021-06-14 09:48:16 | |
| 0000104889-21-000036-index.html | 2021-06-14 09:48:16 | |
| 0000104889-21-000036.txt | 2021-06-14 09:48:16 | |
 0000104889-21-000036-xbrl.zip | 11965 | 2021-06-14 09:48:16 |
| a2021-06x14form8xkex991.htm | 3573 | 2021-06-14 09:48:16 |
| FilingSummary.xml | 1643 | 2021-06-14 09:48:16 |
| Financial_Report.xlsx | 5678 | 2021-06-14 09:48:16 |
| ghc-20210614.htm | 41678 | 2021-06-14 09:48:16 |
| ghc-20210614.xsd | 1900 | 2021-06-14 09:48:16 |
| ghc-20210614_htm.xml | 11255 | 2021-06-14 09:48:16 |
| ghc-20210614_lab.xml | 24137 | 2021-06-14 09:48:16 |
| ghc-20210614_pre.xml | 12511 | 2021-06-14 09:48:16 |
| MetaLinks.json | 16677 | 2021-06-14 09:48:16 |
| R1.htm | 38586 | 2021-06-14 09:48:16 |
| report.css | 2767 | 2021-06-14 09:48:16 |
| Show.js | 1084 | 2021-06-14 09:48:16 |