Variable Interest Entities ("VIEs") - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) lot	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) lot	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Variable Interest Entity [Line Items]
Letters of credit related to lots	$ 7,282		$ 7,282
Net Contract Land Deposit Impairment Recoveries	3,800	$ 8,800	(6,200)	$ 2,500
Loss reserve on contract land deposits	50,183		50,183		$ 57,060
Contract land deposits in cash	$ 580,353		580,353		553,140
Contingent obligations in the form of letters of credit					6,896
Contract land deposit (recoveries) impairments, net			$ (6,217)	$ 2,482
Contingent obligations in the form of letters of credit					$ 6,896
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	127,000		127,000
Contract land deposits in cash under lot purchase Agreements	$ 568,500		$ 568,500
Letters of credit related to lots	$ 7,200		$ 7,200
Contract on Raw Ground with Landowners
Variable Interest Entity [Line Items]
Lots controlled by NVR | lot	23,700		23,700
Contract land deposits in cash	$ 11,900		$ 11,900
Refundable deposits and letters of credit	2,800		2,800
Contingent obligations in the form of letters of credit	100		100
Contingent obligations in the form of letters of credit	$ 100		$ 100