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v2.4.1.9

Notes Receivable (Schedule of Notes Receivables) (Details) (USD $) In Thousands, unless otherwise specified | 0 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Nov. 23, 2013 | Nov. 22, 2013 | Dec. 31, 2013 | Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Notes receivable |  |  | $ 7,556 us-gaap_NotesReceivableNet | $ 0 us-gaap_NotesReceivableNet
Rivendell UM, LLC |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Notes receivable |  |  | 5,256 us-gaap_NotesReceivableNet / us-gaap_CounterpartyNameAxis = grbk_RivendellUMLLCMember |
Interest rate | 17.90%grbk_FinancingReceivableInterestRate / us-gaap_CounterpartyNameAxis = grbk_RivendellUMLLCMember | 15.00%grbk_FinancingReceivableInterestRate / us-gaap_CounterpartyNameAxis = grbk_RivendellUMLLCMember | 17.90%grbk_FinancingReceivableInterestRate / us-gaap_CounterpartyNameAxis = grbk_RivendellUMLLCMember |
Major Road Developers, LLC |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Notes receivable |  |  | 2,200 us-gaap_NotesReceivableNet / us-gaap_CounterpartyNameAxis = grbk_MajorRoadDevelopersLLCMember |
Interest rate |  |  | 0.00%grbk_FinancingReceivableInterestRate / us-gaap_CounterpartyNameAxis = grbk_MajorRoadDevelopersLLCMember |
Other Note Receivables |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Notes receivable |  |  | $ 100 us-gaap_NotesReceivableNet / us-gaap_CounterpartyNameAxis = grbk_OtherNoteReceivablesMember |
Interest rate |  |  | 5.00%grbk_FinancingReceivableInterestRate / us-gaap_CounterpartyNameAxis = grbk_OtherNoteReceivablesMember |

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- Definition Interest rate on notes receivable. + References No definition available. + Details
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Period Type: | duration

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- Details
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- Definition Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 + Details
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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |