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Commitments and Contingent Liabilities - Additional Information (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($)
Commitments And Contingencies [Line Items] |
Maximum range of deposits required under the purchase agreements | 10.00%
Contingent forfeitable deposits with land developers | $ 348,300
Aggregate additional funding commitments related to raw land property development | 2,100
Expected development credit offset amount | 900
Contingent obligations under bonds or letters of credit arrangements | 34,000
Credit Agreement |
Commitments And Contingencies [Line Items] |
Contingent obligations under letters of credit arrangements | $ 12,300

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- Definition Aggregate additional funding commitments related to raw land property development. + References No definition available. + Details
Name: | nvr_AggregateAdditionalFundingCommitmentsRelatedToRawLandPropertyDevelopment
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Commitments and contingencies. + References No definition available. + Details
Name: | nvr_CommitmentsAndContingenciesLineItems
Namespace Prefix: | nvr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amounts represent required payments of forfeitable deposits with land developers under existing, fixed price purchase agreements, assuming that contractual development milestones are met by the developers. + References No definition available. + Details
Name: | nvr_ContingentForfeitableDepositsWithLandDevelopers
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Contingent obligations under bond or letter of credit arrangements with local municipalities, government agencies, or land developers + References No definition available. + Details
Name: | nvr_ContingentObligationsUnderBondOrLetterOfCreditArrangements
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Expected Development Credit Offset Amount + References No definition available. + Details
Name: | nvr_ExpectedDevelopmentCreditOffsetAmount
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Maximum percentage of deposits required under the purchase agreements. + References No definition available. + Details
Name: | nvr_MaximumPercentageOfDepositsRequiredUnderPurchaseAgreements
Namespace Prefix: | nvr_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_DebtInstrumentAxis=nvr_CreditAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |