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Land Under Development - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 Lot Parcels | Dec. 31, 2013 Lot Parcels
Real Estate [Abstract] |  |
Number of raw parcels of land acquired | 4 nvr_NumberOfRawParcelsOfLandAcquired | 5 nvr_NumberOfRawParcelsOfLandAcquired
Carrying value of raw parcels of land | $ 33,689 us-gaap_InventoryRealEstateLandAndLandDevelopmentCosts | $ 41,328 us-gaap_InventoryRealEstateLandAndLandDevelopmentCosts
Number of finished lots for use in homebuilding operations | 480 nvr_NumberOfFinishedLotsIntendedToBeDevelopedFromRawParcelsOfLand | 650 nvr_NumberOfFinishedLotsIntendedToBeDevelopedFromRawParcelsOfLand
Finished lots under lot purchase agreements | 94 nvr_AggregateFinishedLotsUnderContractToBeSoldToUnrelatedPartyUnderAgreement |
Lots sold to unrelated party | 19 nvr_FinishedLotsSoldUnderContractUnrelatedParty | 15 nvr_FinishedLotsSoldUnderContractUnrelatedParty
Aggregate sale price of finished lots to unrelated party | $ 3,100 nvr_AmountOfFinishedLotsSoldUnderContractUnrelatedParty | $ 2,600 nvr_AmountOfFinishedLotsSoldUnderContractUnrelatedParty

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- Definition Aggregate finished lots under contract to be sold to unrelated party under agreement. + References No definition available. + Details
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- Definition Amount of finished lots sold under contract unrelated party. + References No definition available. + Details
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- Definition Finished lots sold under contract unrelated party. + References No definition available. + Details
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- Definition Number of finished lots intended to be developed from raw parcels of land for use in homebuilding operation. + References No definition available. + Details
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- Definition Number of raw parcels of land acquired. + References No definition available. + Details
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- 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)) -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 6 -Subparagraph a -Article 5 + Details
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- Details
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