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| 0001373670-23-000006.txt | 2023-02-27 16:38:02 | |
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| a51ex312certificationofchi.htm | 10761 | 2023-02-27 16:38:02 |
| a5ex311certificationofchie.htm | 10809 | 2023-02-27 16:38:02 |
| a61ex322certificationofchi.htm | 4996 | 2023-02-27 16:38:02 |
| a6ex321certificationofchie.htm | 5018 | 2023-02-27 16:38:02 |
| a7ex21listofsubsidiaries12.htm | 81117 | 2023-02-27 16:38:02 |
| a8ex23consentofrsmusllpind.htm | 2461 | 2023-02-27 16:38:02 |
| FilingSummary.xml | 28273 | 2023-02-27 16:38:02 |
| Financial_Report.xlsx | 121784 | 2023-02-27 16:38:02 |
| grbk-20221231.htm | 2347187 | 2023-02-27 16:38:02 |
| grbk-20221231.xsd | 38026 | 2023-02-27 16:38:02 |
| grbk-20221231_cal.xml | 75811 | 2023-02-27 16:38:02 |
| grbk-20221231_def.xml | 344723 | 2023-02-27 16:38:02 |
 grbk-20221231_g1.jpg | 57158 | 2023-02-27 16:38:02 |
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| grbk-20221231_htm.xml | 1851573 | 2023-02-27 16:38:02 |
| grbk-20221231_lab.xml | 768463 | 2023-02-27 16:38:02 |
| grbk-20221231_pre.xml | 531330 | 2023-02-27 16:38:02 |
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| nsuit-employmentagreement.htm | 131161 | 2023-02-27 16:38:02 |
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| R10.htm | 20815 | 2023-02-27 16:38:02 |
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| R20.htm | 115763 | 2023-02-27 16:38:02 |
| R21.htm | 22877 | 2023-02-27 16:38:02 |
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| R27.htm | 37872 | 2023-02-27 16:38:02 |
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| R3.htm | 6472 | 2023-02-27 16:38:02 |
| R30.htm | 26845 | 2023-02-27 16:38:02 |
| R31.htm | 234156 | 2023-02-27 16:38:02 |
| R32.htm | 37672 | 2023-02-27 16:38:02 |
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| report.css | 2767 | 2023-02-27 16:38:02 |
| Show.js | 1085 | 2023-02-27 16:38:02 |