Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000104889-20-000068-index-headers.html | 2020-11-10 11:22:31 | |
| 0000104889-20-000068-index.html | 2020-11-10 11:22:31 | |
| 0000104889-20-000068.txt | 2020-11-10 11:22:31 | |
 0000104889-20-000068-xbrl.zip | 13419 | 2020-11-10 11:22:31 |
| a2020-11x10form8xkex991.htm | 4009 | 2020-11-10 11:22:31 |
| FilingSummary.xml | 1724 | 2020-11-10 11:22:31 |
| Financial_Report.xlsx | 5455 | 2020-11-10 11:22:31 |
| ghc-20201110.htm | 42035 | 2020-11-10 11:22:31 |
| ghc-20201110.xsd | 2419 | 2020-11-10 11:22:31 |
| ghc-20201110_cal.xml | 713 | 2020-11-10 11:22:31 |
| ghc-20201110_def.xml | 1650 | 2020-11-10 11:22:31 |
| ghc-20201110_htm.xml | 11261 | 2020-11-10 11:22:31 |
| ghc-20201110_lab.xml | 24275 | 2020-11-10 11:22:31 |
| ghc-20201110_pre.xml | 12649 | 2020-11-10 11:22:31 |
| MetaLinks.json | 17251 | 2020-11-10 11:22:31 |
| R1.htm | 38625 | 2020-11-10 11:22:31 |
| report.css | 2767 | 2020-11-10 11:22:31 |
| Show.js | 1085 | 2020-11-10 11:22:31 |