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Joint Ventures - Additional Information (Detail)
$ in Thousands
Sep. 30, 2022
USD ($)
lot
joint_venture
Dec. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Joint Ventures [Line Items]        
Aggregate investment $ 27,800      
Number of joint ventures | joint_venture 5      
Expected production of finished lots | lot 5,400      
Total lots controlled by company under the joint venture | lot 5,000      
Total lots either under contract with unrelated parties or not under the current contract | lot 400      
Additional funding commitments in the aggregate $ 13,500      
Number of joint ventures NVR is not primary beneficiary | joint_venture 4      
Other Assets        
Joint Ventures [Line Items]        
Aggregate investment $ 27,800 $ 20,300    
Home Building Segment        
Joint Ventures [Line Items]        
Restricted cash and cash equivalents 51,239 60,730    
Accrued expenses and other liabilities 427,072 435,860    
Consolidated Joint Venture | Home Building Segment        
Joint Ventures [Line Items]        
Restricted cash and cash equivalents 255 $ 268 $ 271 $ 269
Consolidated Joint Venture | Home Building Segment | Accounts Payable and Accrued Liabilities        
Joint Ventures [Line Items]        
Accrued expenses and other liabilities $ 229