Joint Ventures - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Joint Ventures [Line Items]
Aggregate investment	$ 74,400
Number of joint ventures	5nvr_NumberOfJointVentures
Expected production of finished lots	8,600
Total lots not under contract with NVR under the joint venture	3,300
Additional funding commitments in the aggregate	12,500
Number of joint ventures with additional funding commitment	3
Number of joint ventures NVR is not primary beneficiary	4
Other Assets [Member]
Joint Ventures [Line Items]
Aggregate investment	$ 72,400	$ 80,100

Aggregate additional funding commitments.

No definition available.

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- Definition

Expected production of finished lots from joint ventures.

+ References

No definition available.

+ Details

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- Definition

Lots not under contract with the Company held under the joint venture at a geographic location.

+ References

No definition available.

+ Details

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- Details

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- Definition

The number of joint ventures to which NVR has an additional funding commitment.

+ References

No definition available.

+ Details

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- Definition

Number of joint ventures.

+ References

No definition available.

+ Details

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- Definition

Number of joint ventures the Company is deemed not the primary beneficiary.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

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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