XML 13 R48.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Product Warranties - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Product Warranties Disclosures [Abstract] |  |  |  |
Warranty accrual related to a single completed community | $ 3,000 | $ 15,600 | $ 3,975 | $ 15,600

X
- Definition The warranty reserve provision charge related to remediation of primarily water infiltration issues in a single completed community + References No definition available. + Details
Name: | nvr_WarrantyReserveProvisionSingleCompletedCommunity
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_ProductWarrantiesDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration