Joint Ventures - Additional Information (Detail) $ in Thousands	Dec. 31, 2015 USD ($) Lot JointVenture	Dec. 31, 2014 USD ($) Lot JointVenture
Joint Ventures [Line Items]
Aggregate investment | $	$ 60,500	$ 82,000
Number of joint ventures | JointVenture	6	5
Expected production of finished lots | Lot	8,000	8,800
Total lots not under contract with NVR under the joint venture | Lot	3,300	3,300
Additional funding commitments in the aggregate | $	$ 11,500	$ 11,850
Number of joint ventures with additional funding commitment | JointVenture	3	2
Number of joint ventures NVR is not primary beneficiary | JointVenture	5
Other Assets [Member]
Joint Ventures [Line Items]
Aggregate investment | $	$ 59,800	$ 80,100