Land Under Development - Additional Information (Detail) $ in Thousands	Jun. 30, 2024 USD ($) numberoflots lot
Real Estate [Abstract]
Carrying value of raw parcels of land \| $	$ 61,512
Real Estate [Line Items]
InventoryRealEstateLandAcquisitionCosts \| $	$ 20,000
InventoryRealEstateLandAcquisitionExpectedLots \| numberoflots	850
Total Raw Land Parcel Owned
Real Estate [Abstract]
Number of finished lots expected to be developed from raw parcels of land \| lot	2,600
Real Estate [Line Items]
Number of finished lots expected to be developed from raw parcels of land \| lot	2,600

InventoryRealEstateLandAcquisitionCosts

No definition available.

Name:	nvr_InventoryRealEstateLandAcquisitionCosts
Namespace Prefix:	nvr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

InventoryRealEstateLandAcquisitionExpectedLots

+ References

No definition available.

+ Details

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

- Definition

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

+ References

No definition available.

+ Details

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

- 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://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_InventoryRealEstateLandAndLandDevelopmentCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_RealEstateAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 976
-SubTopic 310
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482856/976-310-50-1

+ Details

Name:	us-gaap_RealEstateLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=nvr_TotalRawLandParcelOwnedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: