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Segment Disclosures - Revenues (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Segment Reporting Revenue Reconciling Item [Line Items] |  |
Total consolidated revenues | $ 957,749 us-gaap_Revenues | $ 811,310 us-gaap_Revenues
Homebuilding Mid Atlantic [Member] |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |
Revenues | 556,120 us-gaap_HomeBuildingRevenue / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingMidAtlanticMember | 465,030 us-gaap_HomeBuildingRevenue / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingMidAtlanticMember
Homebuilding North East [Member] |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |
Revenues | 82,993 us-gaap_HomeBuildingRevenue / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingNorthEastMember | 78,792 us-gaap_HomeBuildingRevenue / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingNorthEastMember
Homebuilding Mid East [Member] |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |
Revenues | 185,429 us-gaap_HomeBuildingRevenue / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingMidEastMember | 150,648 us-gaap_HomeBuildingRevenue / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingMidEastMember
Homebuilding South East [Member] |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |
Revenues | 116,996 us-gaap_HomeBuildingRevenue / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingSouthEastMember | 104,717 us-gaap_HomeBuildingRevenue / us-gaap_StatementBusinessSegmentsAxis = nvr_HomebuildingSouthEastMember
Mortgage Banking [Member] |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |
Mortgage Banking | $ 16,211 us-gaap_FeesAndCommissionsMortgageBanking / us-gaap_StatementBusinessSegmentsAxis = nvr_MortgageBankingMember | $ 12,123 us-gaap_FeesAndCommissionsMortgageBanking / us-gaap_StatementBusinessSegmentsAxis = nvr_MortgageBankingMember

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- Definition The noninterest income derived from mortgage banking activities (fees and commissions), excluding fees earned from servicing third-party assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13 (d)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition Revenue related to the sale of homes and home building activities including design, development, general contracting, and renovation services for residential buildings, including single-family houses, multifamily housing, townhouses, apartments, and modular housing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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