Variable Interest Entities ("VIEs") - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) lot	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) lot	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Variable Interest Entity [Line Items]
Letters of credit related to lots	$ 7,266		$ 7,266
Net Contract Land Deposit Impairment Recoveries	(8,800)	$ 4,100	(2,500)	$ 17,500
Loss reserve on contract land deposits	32,240		32,240		$ 30,041
Contract land deposits in cash	$ 553,812		553,812		$ 527,180
Contract land deposit impairments (recoveries), net			$ 2,482	$ (17,474)
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	125,600		125,600
Contract land deposits in cash under lot purchase Agreements	$ 543,400		$ 543,400
Letters of credit related to lots	$ 7,300		$ 7,300
Contract on Raw Ground with Landowners
Variable Interest Entity [Line Items]
Lots controlled by NVR | lot	23,100		23,100
Contract land deposits in cash	$ 10,400		$ 10,400
Refundable deposits and letters of credit	$ 4,600		$ 4,600