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| 0001373670-19-000009-index.html | 2019-05-03 18:56:45 | |
| 0001373670-19-000009.txt | 2019-05-03 18:56:45 | |
 0001373670-19-000009-xbrl.zip | 179132 | 2019-05-03 18:56:45 |
| a331201910-q.htm | 978556 | 2019-05-03 18:56:45 |
| exhibit101grbk20182.htm | 11039 | 2019-05-03 18:56:45 |
 exhibit101grbk20182001.jpg | 224126 | 2019-05-03 18:56:45 |
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 exhibit101grbk20182005.jpg | 33640 | 2019-05-03 18:56:45 |
| exhibit311certificationofc.htm | 13065 | 2019-05-03 18:56:45 |
| exhibit312certificationofc.htm | 13240 | 2019-05-03 18:56:45 |
| exhibit321certificationofc.htm | 6371 | 2019-05-03 18:56:45 |
| exhibit322certificationofc.htm | 6263 | 2019-05-03 18:56:45 |
| FilingSummary.xml | 39224 | 2019-05-03 18:56:45 |
| Financial_Report.xlsx | 65567 | 2019-05-03 18:56:45 |
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| grbk-20190331.xsd | 47057 | 2019-05-03 18:56:45 |
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| report.css | 2767 | 2019-05-03 18:56:45 |
| Show.js | 1085 | 2019-05-03 18:56:45 |