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Segment Information, Nature of Operations, and Certain Concentrations - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2013 MetropolitanArea
Segment Reporting Information [Line Items] |
Number of metropolitan areas Ryan Homes product are sold | 27
Revenue derived from Washington, D.C metro area | 31.00%
Revenue derived from Baltimore, MD metro area. | 15.00%
Senior notes interest rate | 3.95%
Senior Notes due 2022 [Member] |
Segment Reporting Information [Line Items] |
Senior notes interest rate | 3.95%
Homebuilding [Member] |
Segment Reporting Information [Line Items] |
Number of reportable segments | 4
Mortgage Banking [Member] |
Segment Reporting Information [Line Items] |
Number of reportable segments | 1

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- Definition The number of metropolitan areas that Ryan Homes products are sold in. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Percentage of homebuilding revenue derived from Baltimore, MD metro area. + References No definition available. + Details
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Namespace Prefix: | nvr_
Data Type: | num:percentItemType
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Period Type: | duration

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- Definition Percentage of homebuilding revenue derived from Washington, D.C. metro area. + References No definition available. + Details
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Namespace Prefix: | nvr_
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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- Details
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