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| 0001373670-22-000008.txt | 2022-03-01 17:01:43 | |
 0001373670-22-000008-xbrl.zip | 512341 | 2022-03-01 17:01:43 |
| exhibit1036.htm | 20174 | 2022-03-01 17:01:43 |
| exhibit21listofsubsidiarie.htm | 81115 | 2022-03-01 17:01:43 |
| exhibit23consentofrsmusllp.htm | 2425 | 2022-03-01 17:01:43 |
| exhibit311certificationofc.htm | 10788 | 2022-03-01 17:01:43 |
| exhibit312certificationofc.htm | 10757 | 2022-03-01 17:01:43 |
| exhibit321certificationofc.htm | 4997 | 2022-03-01 17:01:43 |
| exhibit322certificationofc.htm | 4992 | 2022-03-01 17:01:43 |
| exhibit42.htm | 25826 | 2022-03-01 17:01:43 |
| FilingSummary.xml | 25793 | 2022-03-01 17:01:43 |
| Financial_Report.xlsx | 107660 | 2022-03-01 17:01:43 |
| grbk-20211231.htm | 2307976 | 2022-03-01 17:01:43 |
| grbk-20211231.xsd | 37877 | 2022-03-01 17:01:43 |
| grbk-20211231_cal.xml | 78523 | 2022-03-01 17:01:43 |
| grbk-20211231_def.xml | 331217 | 2022-03-01 17:01:43 |
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| grbk-20211231_htm.xml | 1839644 | 2022-03-01 17:01:43 |
| grbk-20211231_lab.xml | 773383 | 2022-03-01 17:01:43 |
| grbk-20211231_pre.xml | 523867 | 2022-03-01 17:01:43 |
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| report.css | 2767 | 2022-03-01 17:01:43 |
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