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| a5ex311certificationofchie.htm | 10812 | 2022-11-02 16:37:43 |
| a6ex312certificationofchie.htm | 10764 | 2022-11-02 16:37:43 |
| a7ex321certificationofchie.htm | 5021 | 2022-11-02 16:37:43 |
| a8ex322certificationofchie.htm | 4999 | 2022-11-02 16:37:43 |
| FilingSummary.xml | 32591 | 2022-11-02 16:37:43 |
| Financial_Report.xlsx | 91006 | 2022-11-02 16:37:43 |
| grbk-20220930.htm | 1771604 | 2022-11-02 16:37:43 |
| grbk-20220930.xsd | 33354 | 2022-11-02 16:37:43 |
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