Variable Interest Entities - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) lot	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Variable Interest Entity [Line Items]
Maximum range of deposits required under the purchase agreements	10.00%
Net Contract Land Deposit Impairment Recoveries	$ 22,100	$ (25,600)	$ 700
Contract Land Deposits	$ 527,180	$ 439,833
Variable Interest Entities
Variable Interest Entity [Line Items]
Maximum range of deposits required under the purchase agreements	10.00%
Lots controlled by NVR | lot	122,800
Contract land deposits in cash under Lot Purchase Agreements	$ 521,900
Letters of credit related to lots	$ 10,100
Contract on Raw Ground with Landowners
Variable Interest Entity [Line Items]
Lots controlled by NVR | lot	15,500
Refundable deposits	$ 3,400
Contract Land Deposits	$ 5,300