Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000104889-20-000051-index-headers.html | 2020-09-10 16:56:30 | |
| 0000104889-20-000051-index.html | 2020-09-10 16:56:30 | |
| 0000104889-20-000051.txt | 2020-09-10 16:56:30 | |
 0000104889-20-000051-xbrl.zip | 13261 | 2020-09-10 16:56:30 |
| a2020-09x10form8xkexhi.htm | 4174 | 2020-09-10 16:56:30 |
| FilingSummary.xml | 1723 | 2020-09-10 16:56:30 |
| Financial_Report.xlsx | 5457 | 2020-09-10 16:56:30 |
| ghc-20200910.htm | 51860 | 2020-09-10 16:56:30 |
| ghc-20200910.xsd | 2419 | 2020-09-10 16:56:30 |
| ghc-20200910_cal.xml | 713 | 2020-09-10 16:56:30 |
| ghc-20200910_def.xml | 1650 | 2020-09-10 16:56:30 |
| ghc-20200910_htm.xml | 11307 | 2020-09-10 16:56:30 |
| ghc-20200910_lab.xml | 24275 | 2020-09-10 16:56:30 |
| ghc-20200910_pre.xml | 12649 | 2020-09-10 16:56:30 |
| MetaLinks.json | 17251 | 2020-09-10 16:56:30 |
| R1.htm | 38625 | 2020-09-10 16:56:30 |
| report.css | 2767 | 2020-09-10 16:56:30 |
| Show.js | 1085 | 2020-09-10 16:56:30 |