Joint Ventures - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014 JointVenture Lot
Joint Ventures [Line Items]
Aggregate investment	$ 87,100
Expected production of finished lots	8,800
Number of joint ventures	4
Total lots not under contract with NVR under the joint venture	3,300
Other Assets [Member]
Joint Ventures [Line Items]
Aggregate investment	$ 83,800
Number of joint ventures NVR is not primary beneficiary	3

Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Data Type:	xbrli:monetaryItemType
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