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Related Party Transactions - Additional Information (Detail) (Elm Street [Member], USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 Lot | Dec. 31, 2012 | Dec. 31, 2011
Elm Street [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Related party forward lot purchase agreement purchase price | $ 41,300 |  |
Number of related parties for forward lot purchase agreement | 1 |  |
Market price of developed lots | 38,400 | 54,600 | 36,100
Expected yield of related party lots | 2,400 |  |
Development costs to manage property under related party transactions | $ 143 | $ 143 | $ 143

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- Definition Expected yield of finished lots with remaining land of related party. + References No definition available. + Details
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- Definition Management fee paid to related party for property development. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Number of related parties for forward lot purchase agreement. + References No definition available. + Details
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Namespace Prefix: | nvr_
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- Definition Fixed price purchase agreements entered into with related party. + References No definition available. + Details
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Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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- Definition Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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