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Segment Information, Nature of Operations, and Certain Concentrations (Details Textual) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 JointVenture MetropolitanArea | Dec. 31, 2010
Segment Reporting Information [Line Items] |  |
Forfeiture Estimate Adjustment |  | $ 7,000
Segment Information Nature of Operations, and Certain Concentrations (Textual) [Abstract] |  |
Number of metropolitan areas Ryan Homes product are sold | 25 |
Revenue derived from Washington, D.C. and Baltimore, MD metropolitan areas | 46.00% |
Pre-tax reversal of stock-based compensation expense attributable to forfeiture estimate | $ 0 |
Number of consolidated joint ventures | 1 |
Maximum bonus opportunity payout | 50.00% |
Homebuilding [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of reportable business segments | 4 |
Mortgage Banking [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of reportable business segments | 1 |

X
- Definition Pre-tax adjustment of stock-based compensation expense attributable to an adjustment of option forfeiture estimates. + References No definition available. + Details
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X
- Definition Maximum bonus opportunity payout. + References No definition available. + Details
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Balance Type: | na
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- Definition Number of consolidated joint ventures. + References No definition available. + Details
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Namespace Prefix: | nvr_
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Balance Type: | na
Period Type: | duration

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

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- Definition Number of reportable business segments. + References No definition available. + Details
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- Definition Percentage of homebuilding revenue derived from Washington, D.C. and Baltimore, MD metropolitan areas. + References No definition available. + Details
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Namespace Prefix: | nvr_
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- Details
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- Definition Pre-tax reversal of stock-based compensation expense attributable to an adjustment of the Company's option forfeiture estimates. + References No definition available. + Details
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Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
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Period Type: | duration

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- Details
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