Variable Interest Entities - Total Risk Related to Lot Options (Parenthetical) (Detail)	Mar. 31, 2015 Lot	Dec. 31, 2014 Lot
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Finished lots committed to purchase under specific performance obligations	10nvr_FinishedLotsCommittedToPurchase	10nvr_FinishedLotsCommittedToPurchase

Finished lots committed to purchase under specific performance obligations.

No definition available.

Name:	nvr_FinishedLotsCommittedToPurchase
Namespace Prefix:	nvr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant