Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000104889-20-000018-index-headers.html | 2020-03-31 08:32:07 | |
| 0000104889-20-000018-index.html | 2020-03-31 08:32:07 | |
| 0000104889-20-000018.txt | 2020-03-31 08:32:07 | |
 0000104889-20-000018-xbrl.zip | 15283 | 2020-03-31 08:32:07 |
| FilingSummary.xml | 1664 | 2020-03-31 08:32:07 |
| Financial_Report.xlsx | 5791 | 2020-03-31 08:32:07 |
| form8-k.htm | 57120 | 2020-03-31 08:32:07 |
| form8-k_htm.xml | 4366 | 2020-03-31 08:32:07 |
| ghc-20200331.xsd | 4427 | 2020-03-31 08:32:07 |
| ghc-20200331_cal.xml | 611 | 2020-03-31 08:32:07 |
| ghc-20200331_def.xml | 1461 | 2020-03-31 08:32:07 |
| ghc-20200331_lab.xml | 26142 | 2020-03-31 08:32:07 |
| ghc-20200331_pre.xml | 13567 | 2020-03-31 08:32:07 |
| MetaLinks.json | 18171 | 2020-03-31 08:32:07 |
| R1.htm | 38616 | 2020-03-31 08:32:07 |
| report.css | 2767 | 2020-03-31 08:32:07 |
| Show.js | 1084 | 2020-03-31 08:32:07 |