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Variable Interest Entities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified |  |  | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2013 Lot | Dec. 31, 2012 | Dec. 31, 2013 Development Entities [Member]
Variable Interest Entity [Line Items] |  |  |
Maximum range of deposits required under the purchase agreements | 10.00% |  |
Power of developer's equity holders to direct operating activities of the development entity | 100.00% |  |
Voting rights description |  |  | NVR has no voting rights in any of the development entities
Lots controlled by NVR | 58,100 |  |
Contract land deposits | $ 296,646 | $ 256,577 |
Letters of credit related to lots | $ 2,459 | $ 3,338 |

X
- Definition The gross amount as of the balance sheet date of deposits paid to secure the right to purchase finished lots under fixed price purchase agreements. + References No definition available. + Details
Name: | nvr_ContractLandDeposits
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Letters of credit related to deposits on fixed price lot purchase agreements. + References No definition available. + Details
Name: | nvr_LettersOfCreditRelatedToLots
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Lots controlled by NVR. + References No definition available. + Details
Name: | nvr_LotsControlledByCompany
Namespace Prefix: | nvr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Power of developer's equity holders to direct operating activities of the development entity. + References No definition available. + Details
Name: | nvr_PowerOfDevelopersEquityHoldersToDirectOperatingActivitiesOfDevelopmentEntity
Namespace Prefix: | nvr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Voting rights description. + References No definition available. + Details
Name: | nvr_VotingRightsDescription
Namespace Prefix: | nvr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_VariableInterestEntityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration