Joint Ventures - Additional Information (Detail) $ in Thousands	Mar. 31, 2022 USD ($) lot joint_venture	Dec. 31, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Joint Ventures [Line Items]
Aggregate investment	$ 18,800
Number of joint ventures | joint_venture	4
Expected production of finished lots | lot	2,200
Total lots controlled by company under the joint venture | lot	1,850
Total lots either under contract with unrelated parties or not under the current contract | lot	350
Additional funding commitments in the aggregate	$ 2,000
Number of joint ventures NVR is not primary beneficiary | joint_venture	3
Other Assets
Joint Ventures [Line Items]
Aggregate investment	$ 18,800	$ 20,300
Home Building Segment
Joint Ventures [Line Items]
Restricted cash and cash equivalents	65,562	60,730
Accrued expenses and other liabilities	501,091	435,860
Consolidated Joint Venture | Home Building Segment | Other Assets
Joint Ventures [Line Items]
Restricted cash and cash equivalents	262	$ 268	$ 273	$ 269
Consolidated Joint Venture | Home Building Segment | Accounts Payable and Accrued Liabilities
Joint Ventures [Line Items]
Accrued expenses and other liabilities	$ 235