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Segment Disclosures - Corporate Capital Allocation Charge (Detail) (Corporate Capital Allocation [Member], USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Segment Reporting Other Significant Reconciling Item [Line Items] |  |
Segment reporting reconciling amount for operating profit | $ 36,945 nvr_SegmentReportingReconcilingAmountsForOperatingProfitLossFromSegmentToConsolidatedTotal | $ 28,966 nvr_SegmentReportingReconcilingAmountsForOperatingProfitLossFromSegmentToConsolidatedTotal
Homebuilding Mid Atlantic [Member] |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |
Segment reporting reconciling amount for operating profit | 23,411 nvr_SegmentReportingReconcilingAmountsForOperatingProfitLossFromSegmentToConsolidatedTotal / us-gaap_IncomeStatementLocationAxis = nvr_CorporateCapitalAllocationMember / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingMidAtlanticMember | 18,156 nvr_SegmentReportingReconcilingAmountsForOperatingProfitLossFromSegmentToConsolidatedTotal / us-gaap_IncomeStatementLocationAxis = nvr_CorporateCapitalAllocationMember / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingMidAtlanticMember
Homebuilding North East [Member] |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |
Segment reporting reconciling amount for operating profit | 3,310 nvr_SegmentReportingReconcilingAmountsForOperatingProfitLossFromSegmentToConsolidatedTotal / us-gaap_IncomeStatementLocationAxis = nvr_CorporateCapitalAllocationMember / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingNorthEastMember | 2,449 nvr_SegmentReportingReconcilingAmountsForOperatingProfitLossFromSegmentToConsolidatedTotal / us-gaap_IncomeStatementLocationAxis = nvr_CorporateCapitalAllocationMember / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingNorthEastMember
Homebuilding Mid East [Member] |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |
Segment reporting reconciling amount for operating profit | 5,935 nvr_SegmentReportingReconcilingAmountsForOperatingProfitLossFromSegmentToConsolidatedTotal / us-gaap_IncomeStatementLocationAxis = nvr_CorporateCapitalAllocationMember / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingMidEastMember | 5,298 nvr_SegmentReportingReconcilingAmountsForOperatingProfitLossFromSegmentToConsolidatedTotal / us-gaap_IncomeStatementLocationAxis = nvr_CorporateCapitalAllocationMember / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingMidEastMember
Homebuilding South East [Member] |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |
Segment reporting reconciling amount for operating profit | $ 4,289 nvr_SegmentReportingReconcilingAmountsForOperatingProfitLossFromSegmentToConsolidatedTotal / us-gaap_IncomeStatementLocationAxis = nvr_CorporateCapitalAllocationMember / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingSouthEastMember | $ 3,063 nvr_SegmentReportingReconcilingAmountsForOperatingProfitLossFromSegmentToConsolidatedTotal / us-gaap_IncomeStatementLocationAxis = nvr_CorporateCapitalAllocationMember / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingSouthEastMember

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- Definition Amount of an item in the reconciliation of total profit or loss from reportable segments, to the entity's consolidated income before income taxes, extraordinary items, discontinued operations. + References No definition available. + Details
Name: | nvr_SegmentReportingReconcilingAmountsForOperatingProfitLossFromSegmentToConsolidatedTotal
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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