v3.26.1
Summary of Significant Accounting Policies - Schedule of Financial Instruments in the Master Trust Measured at Fair Value (Details) - EBP 333 - Master Trust - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
EBP, Master Trust [Line Items]    
Total investments in the Master Trust $ 2,265,561 $ 2,315,523
NVR, Inc common stock    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 1,256,922 1,463,267
Investments in registered investment companies    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 309,745 252,895
Self-directed brokerage accounts    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 38,321 29,501
Cash    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 111 117
Investments in common/collective trusts    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 660,462 569,743
Total    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 1,605,099 1,745,780
Total | NVR, Inc common stock    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 1,256,922 1,463,267
Total | Investments in registered investment companies    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 309,745 252,895
Total | Self-directed brokerage accounts    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 38,321 29,501
Total | Cash    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 111 117
Level 1    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 1,605,099 1,745,780
Level 1 | NVR, Inc common stock    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 1,256,922 1,463,267
Level 1 | Investments in registered investment companies    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 309,745 252,895
Level 1 | Self-directed brokerage accounts    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 38,321 29,501
Level 1 | Cash    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 111 117
Level 2    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 0 0
Level 2 | NVR, Inc common stock    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 0 0
Level 2 | Investments in registered investment companies    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 0 0
Level 2 | Self-directed brokerage accounts    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 0 0
Level 2 | Cash    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 0 0
Level 3    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 0 0
Level 3 | NVR, Inc common stock    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 0 0
Level 3 | Investments in registered investment companies    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 0 0
Level 3 | Self-directed brokerage accounts    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 0 0
Level 3 | Cash    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust 0 0
Investments measured at net asset value | Investments in common/collective trusts    
EBP, Master Trust [Line Items]    
Total investments in the Master Trust $ 660,462 $ 569,743