XML 36 R23.htm IDEA: XBRL DOCUMENT
v3.21.2

Inventory (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2021
Inventory Disclosure [Abstract] |
Schedule of Real Estate Inventory | A summary of inventory is as follows (in thousands):
| June 30, 2021 |  | December 31, 2020
Homes completed or under construction | $ | 535,138 |  |  | $ | 356,706 |
Land and lots - developed and under development | 567,398 |  |  | 482,371 |
Land held for sale | 3,605 |  |  | 5,558 |
Total inventory | $ | 1,106,141 |  |  | $ | 844,635 |
Summary of Real Estate Inventory Capitalized Interest Costs | A summary of interest costs incurred, capitalized and expensed is as follows (in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Interest capitalized at beginning of period | $ | 18,380 |  |  | $ | 18,876 |  | $ | 17,520 |  |  | $ | 18,596 |
Interest incurred | 3,250 |  |  | 2,708 |  | 6,101 |  |  | 5,667 |
Interest charged to cost of revenues | (2,670) |  |  | (2,793) |  | (4,661) |  |  | (5,472) |
Interest capitalized at end of period | $ | 18,960 |  |  | $ | 18,791 |  | $ | 18,960 |  |  | $ | 18,791 |
Capitalized interest as a percentage of inventory | 1.7 | % |  | 2.5 | % |  | 1.7 | % |  | 2.5 | %

X
- Definition Summary of Real Estate Inventory Capitalized Interest Costs [Table Text Block] + References No definition available. + Details
Name: | grbk_SummaryofRealEstateInventoryCapitalizedInterestCostsTableTextBlock
Namespace Prefix: | grbk_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of real estate properties and units in those properties that are included in the discussion of the nature of an entity's operations. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRealEstatePropertiesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration