XML 17 R33.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Variable Interest Entities - Total Risk Related to Lot Options (Parenthetical) (Detail) | Jun. 30, 2014 Lot | Dec. 31, 2013 Lot
--- | --- | ---
Organization Consolidation And Presentation Of Financial Statements [Abstract] |  |
Finished lots committed to purchase under specific performance obligations | 10 | 13

X
- Definition Finished lots committed to purchase under specific performance obligations. + References No definition available. + Details
Name: | nvr_FinishedLotsCommittedToPurchase
Namespace Prefix: | nvr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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