XML 44 R44.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Variable Interest Entities and Joint Ventures - Condensed Balance Sheets of Consolidated JV (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | --- | ---
Variable Interest Entity [Line Items] |  |  |
Cash | $ 906 | $ 462 |
Restricted cash | 505 | 503 |
Other assets | 833 | 125 |
Land under development | 13,382 | 19,092 |
Total assets | 15,626 | 20,182 | 22,371
Debt | 4,574 | 4,983 |
Accrued expenses | 935 | 108 |
Equity | 10,117 | 15,091 |
Total liabilities and equity | $ 15,626 | $ 20,182 |

X
- Definition Accrued expenses related to consolidated joint venture. + References No definition available. + Details
Name: | nvr_AccruedExpensesRelatedToConsolidatedJointVenture
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash related to consolidated joint venture. + References No definition available. + Details
Name: | nvr_CashRelatedToConsolidatedJointVenture
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Equity related to consolidated joint venture. + References No definition available. + Details
Name: | nvr_EquityRelatedToConsolidatedJointVenture
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Land under development related to consolidated joint venture. + References No definition available. + Details
Name: | nvr_LandUnderDevelopmentRelatedToConsolidatedJointVenture
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Other assets related to consolidated joint venture. + References No definition available. + Details
Name: | nvr_OtherAssetsRelatedToConsolidatedJointVenture
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Restricted cash related to consolidated joint venture. + References No definition available. + Details
Name: | nvr_RestrictedCashRelatedToConsolidatedJointVenture
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The carrying amount of the consolidated joint venture's liability and equity included in the reporting entity's statement of financial position. + References No definition available. + Details
Name: | nvr_VariableInterestEntityConsolidatedCarryingAmountLiabilitiesAndEquity
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of debt for which creditor does not have general recourse to the debtor but rather has recourse only to the property used for collateral in the transaction or other specific property. + References No definition available. + Details
Name: | us-gaap_NonRecourseDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=7880789&loc=d3e5710-111685 + Details
Name: | us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_VariableInterestEntityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration