Variable Interest Entities ("VIEs") - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) lot	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) lot	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Variable Interest Entity [Line Items]
Letters of credit related to lots	$ 4,015		$ 4,015
Net Contract Land Deposit Impairment Recoveries	18,900	$ 3,900	40,100	$ 4,900
Loss reserve on contract land deposits	85,368		85,368		$ 58,597
Contract land deposits in cash	$ 953,676		953,676		785,272
Contingent obligations in the form of letters of credit					8,722
Contract land deposit impairments (recoveries), net			$ 40,138	$ (4,868)
Contingent obligations in the form of letters of credit					$ 8,722
Variable Interest Entities
Variable Interest Entity [Line Items]
Maximum range of deposits required under the purchase agreements	10.00%		10.00%
Lots controlled by NVR | lot	166,050		166,050
Contract land deposits in cash under lot purchase Agreements	$ 907,600		$ 907,600
Letters of credit related to lots	$ 4,000		$ 4,000
Contract on Raw Ground with Landowners
Variable Interest Entity [Line Items]
Lots controlled by NVR | lot	47,100		47,100
Contract land deposits in cash	$ 46,100		$ 46,100
Refundable deposits and letters of credit	$ 10,400		$ 10,400