Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000104889-20-000063-index-headers.html | 2020-11-04 08:36:26 | |
| 0000104889-20-000063-index.html | 2020-11-04 08:36:26 | |
| 0000104889-20-000063.txt | 2020-11-04 08:36:26 | |
 0000104889-20-000063-xbrl.zip | 39789 | 2020-11-04 08:36:26 |
| a2020q38-kexhibit991.htm | 547482 | 2020-11-04 08:36:26 |
| FilingSummary.xml | 1721 | 2020-11-04 08:36:26 |
| Financial_Report.xlsx | 5460 | 2020-11-04 08:36:26 |
| ghc-20201104.htm | 41108 | 2020-11-04 08:36:26 |
| ghc-20201104.xsd | 2419 | 2020-11-04 08:36:26 |
| ghc-20201104_cal.xml | 713 | 2020-11-04 08:36:26 |
| ghc-20201104_def.xml | 1650 | 2020-11-04 08:36:26 |
| ghc-20201104_htm.xml | 11261 | 2020-11-04 08:36:26 |
| ghc-20201104_lab.xml | 24275 | 2020-11-04 08:36:26 |
| ghc-20201104_pre.xml | 12649 | 2020-11-04 08:36:26 |
| MetaLinks.json | 17251 | 2020-11-04 08:36:26 |
| R1.htm | 38626 | 2020-11-04 08:36:26 |
| report.css | 2767 | 2020-11-04 08:36:26 |
| Show.js | 1085 | 2020-11-04 08:36:26 |