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Variable Interest Entities - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Lot
Dec. 31, 2012
Dec. 31, 2013
Development Entities [Member]
Variable Interest Entity [Line Items]      
Maximum range of deposits required under the purchase agreements 10.00%    
Power of developer's equity holders to direct operating activities of the development entity 100.00%    
Voting rights description     NVR has no voting rights in any of the development entities
Lots controlled by NVR 58,100    
Contract land deposits $ 296,646 $ 256,577  
Letters of credit related to lots $ 2,459 $ 3,338