XML 70 R11.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Inventory (Tables) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Inventory, Real Estate [Abstract] |  |  |  |
Inventory with potential indicators of impairment | $ 11,200 |  |  |
Inventory [Line Items] |  |  |  |
Impairment of Tangible Assets, Other Descriptors | $ 100 | $ 100 | $ 100 |
Inventory Disclosure [Text Block] | INVENTORY A summary of inventory is as follows (in thousands):
| December 31, 2019 |  | December 31, 2018
Homes completed or under construction | $ | 314,966 |  |  | $ | 268,763 |
Land and lots - developed and under development | 437,553 |  |  | 399,809 |
Land held for sale | 1,048 |  |  | 389 |
Total inventory | $ | 753,567 |  |  | $ | 668,961 |
A summary of interest costs incurred, capitalized and expensed is as follows (in thousands):
| Years Ended December 31,
| 2019 |  | 2018 |  | 2017
Interest capitalized at beginning of period | $ | 14,780 |  |  | $ | 10,474 |  |  | $ | 9,417 |
Interest incurred | 12,140 |  |  | 9,003 |  |  | 4,456 |
Interest charged to cost of revenues | (8,324 | ) |  | (4,697 | ) |  | (3,399 | )
Interest capitalized at end of period | $ | 18,596 |  |  | $ | 14,780 |  |  | $ | 10,474 |
As of December 31, 2019, the Company reviewed the performance and outlook for all of its communities for indicators of potential impairment and performed detailed impairment analysis when necessary. As of December 31, 2019, the Company performed further impairment analysis of the selling communities with indicators of impairment with a combined corresponding carrying value of approximately $11.2 million. For the years ended December 31, 2019, 2018 and 2017, the Company recorded impairment adjustments of $0.1 million, $0.1 million, and $0.1 million, respectively, to reduce the carrying value of impaired communities to fair value. The recorded impairment adjustments related to real estate inventory in our builder operations segments and were included in cost of residential units in our consolidated statements of income. |  |  |
Finished Homes and Homes under Construction | $ 314,966 | 268,763 |  |
Inventory, Real Estate, Land and Land Development Costs | 437,553 | 399,809 |  |
Inventory, Land Held-for-sale | 1,048 | 389 |  |
Inventory, Real Estate | $ 753,567 | 668,961 |  |
Schedule of Inventory, Current [Table Text Block] | A summary of inventory is as follows (in thousands):
| December 31, 2019 |  | December 31, 2018
Homes completed or under construction | $ | 314,966 |  |  | $ | 268,763 |
Land and lots - developed and under development | 437,553 |  |  | 399,809 |
Land held for sale | 1,048 |  |  | 389 |
Total inventory | $ | 753,567 |  |  | $ | 668,961 |
Real Estate Inventory, Capitalized Interest Costs [Roll Forward] | A summary of interest costs incurred, capitalized and expensed is as follows (in thousands):
| Years Ended December 31,
| 2019 |  | 2018 |  | 2017
Interest capitalized at beginning of period | $ | 14,780 |  |  | $ | 10,474 |  |  | $ | 9,417 |
Interest incurred | 12,140 |  |  | 9,003 |  |  | 4,456 |
Interest charged to cost of revenues | (8,324 | ) |  | (4,697 | ) |  | (3,399 | )
Interest capitalized at end of period | $ | 18,596 |  |  | $ | 14,780 |  |  | $ | 10,474 |
Real Estate Inventory, Capitalized Interest Costs | $ 18,596 | 14,780 | 10,474 | $ 9,417
Real Estate Inventory, Capitalized Interest Costs Incurred | 12,140 | 9,003 | 4,456 |
Real Estate Inventory, Capitalized Interest Costs, Cost of Sales | $ 8,324 | $ 4,697 | $ 3,399 |

X
- Definition Finished Homes and Homes under Construction + References No definition available. + Details
Name: | grbk_FinishedHomesandHomesunderConstruction
Namespace Prefix: | grbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Inventory with potential indicators of impairment + References No definition available. + Details
Name: | grbk_Inventorywithpotentialindicatorsofimpairment
Namespace Prefix: | grbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 + Details
Name: | us-gaap_ImpairmentOfRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
Name: | us-gaap_InventoryDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount as of the balance sheet date of parcels of land held for sale, and on which the entity has no intention or no further intention to perform construction activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_InventoryLandHeldForSale
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_InventoryLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total of (1) improvements, (2) held-for-sale, (3) land and land under development, (4) construction-in-process, (5) mortgage loans held-in-inventory, and (6) other real estate investments which are considered inventory due to being held for sale or disposition. + References No definition available. + Details
Name: | us-gaap_InventoryRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Carrying amount as of the balance sheet date, net of valuation allowances and impairment losses, of costs of land expected to be developed in the near term plus capitalized costs of development, for purposes of selling completed units to home buyers or commercial or industrial entities.. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_InventoryRealEstateLandAndLandDevelopmentCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Carrying amount as of the balance sheet date of interest costs that were capitalized to properties under development during the land development and construction period of a project, and which are included in inventory. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
Name: | us-gaap_RealEstateInventoryCapitalizedInterestCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of interest cost charged to cost of sales that had been previously capitalized to inventory. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
Name: | us-gaap_RealEstateInventoryCapitalizedInterestCostsCostOfSales1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of interest capitalized to an operative builder's inventory during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
Name: | us-gaap_RealEstateInventoryCapitalizedInterestCostsIncurred
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(c)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 + Details
Name: | us-gaap_ScheduleOfInventoryCurrentTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration