Variable Interest Entities - Additional Information (Detail) - Jun. 30, 2015 $ in Thousands	USD ($) Lot
Variable Interest Entity [Line Items]
Maximum range of deposits required under the purchase agreements	10.00%
Lots controlled by NVR | Lot	65,300
Contract land deposits in cash	$ 347,900
Letters of credit related to lots	$ 2,300
Development Entities [Member]
Variable Interest Entity [Line Items]
Voting rights description	NVR has no voting rights in any of the development entities
Contract on Raw Ground with Land Owners [Member]
Variable Interest Entity [Line Items]
Lots controlled by NVR | Lot	6,400
Contract land deposits	$ 3,200
Letters of credit related to land contract	1,300
Refundable deposits and letters of credit	$ 4,400