Product Warranties - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2014
Product Warranties Disclosures [Abstract]
Warranty reserve provision related to single completed community		$ 3,000	$ 3,975
Warranty reserve provision reversed related to single completed community	$ 1,300

The reversal of the previously recognized warranty reserve provision charge, which is related to the remediation of primarily water infiltration issues in a single completed community.

No definition available.

Name:	nvr_WarrantyReserveProvisionWrittenOffSingleCompletedCommunity
Namespace Prefix:	nvr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration