Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000104889-20-000029-index-headers.html | 2020-05-05 08:42:11 | |
| 0000104889-20-000029-index.html | 2020-05-05 08:42:11 | |
| 0000104889-20-000029.txt | 2020-05-05 08:42:11 | |
 0000104889-20-000029-xbrl.zip | 33445 | 2020-05-05 08:42:11 |
| a2020q18-kearningsrele.htm | 51861 | 2020-05-05 08:42:11 |
| a2020q18-kearningsrele_htm.xml | 4214 | 2020-05-05 08:42:11 |
| dexhibit991.htm | 405280 | 2020-05-05 08:42:11 |
| FilingSummary.xml | 1742 | 2020-05-05 08:42:11 |
| Financial_Report.xlsx | 5800 | 2020-05-05 08:42:11 |
| ghc-20200505.xsd | 4427 | 2020-05-05 08:42:11 |
| ghc-20200505_cal.xml | 611 | 2020-05-05 08:42:11 |
| ghc-20200505_def.xml | 1461 | 2020-05-05 08:42:11 |
| ghc-20200505_lab.xml | 26147 | 2020-05-05 08:42:11 |
| ghc-20200505_pre.xml | 13567 | 2020-05-05 08:42:11 |
| MetaLinks.json | 18228 | 2020-05-05 08:42:11 |
| R1.htm | 38619 | 2020-05-05 08:42:11 |
| report.css | 2767 | 2020-05-05 08:42:11 |
| Show.js | 1085 | 2020-05-05 08:42:11 |