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| 0001373670-20-000051-index.html | 2020-08-04 16:38:07 | |
| 0001373670-20-000051.txt | 2020-08-04 16:38:07 | |
 0001373670-20-000051-xbrl.zip | 261965 | 2020-08-04 16:38:07 |
| exhibit311certificatio.htm | 12558 | 2020-08-04 16:38:07 |
| exhibit312certificatio.htm | 12543 | 2020-08-04 16:38:07 |
| exhibit321certificatio.htm | 6038 | 2020-08-04 16:38:07 |
| exhibit322certificatio.htm | 6050 | 2020-08-04 16:38:07 |
| FilingSummary.xml | 31554 | 2020-08-04 16:38:07 |
| Financial_Report.xlsx | 77491 | 2020-08-04 16:38:07 |
| grbk-20200630.htm | 2379316 | 2020-08-04 16:38:07 |
| grbk-20200630.xsd | 31703 | 2020-08-04 16:38:07 |
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| grbk-20200630_lab.xml | 515120 | 2020-08-04 16:38:07 |
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| report.css | 2767 | 2020-08-04 16:38:07 |
| Show.js | 1085 | 2020-08-04 16:38:07 |