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Land Under Development - Additional Information (Detail) $ in Thousands	Mar. 31, 2022 USD ($) lot
Real Estate [Abstract]
Carrying value of raw parcels of land	$ 14,668
Number of finished lots expected to be developed from raw parcels of land | lot	350
Aggregate additional funding commitments related to raw land property under joint development	$ 2,000
Expected development credits that will offset the aggregate additional funding commitments related to raw land property development	$ 600

X

- Definition

Aggregate additional funding commitments related to raw land property development.

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

Expected Development Credit

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Definition

Number of finished lots expected to be developed from raw parcels of land.

+ References

No definition available.

+ Details

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Namespace Prefix:	nvr_
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- Definition

Carrying amount as of the balance sheet date, net of valuation allowances and impairment losses, of costs of land expected to be developed in the near term plus capitalized costs of development, for purposes of selling completed units to home buyers or commercial or industrial entities..

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.6(a))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- References

No definition available.

+ Details

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