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Debt - Debt Maturities (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012
--- | ---
Schedule Of Debt Maturities [Line Items] |
2013 | $ 642
2014 | 115
2015 |
2016 |
2017 |
Thereafter | 600,000
Total | $ 600,757

X
- Definition Carrying value as of the balance sheet date of outstanding debt due within one year of the balance sheet date. + References No definition available. + Details
Name: | nvr_DebtBorrowingsDueCurrent
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of outstanding debt due within the fifth year of the balance sheet date. + References No definition available. + Details
Name: | nvr_DebtBorrowingsDueInFiveYears
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of outstanding debt due within the fourth year of the balance sheet date. + References No definition available. + Details
Name: | nvr_DebtBorrowingsDueInFourYears
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of outstanding debt due within the third year of the balance sheet date. + References No definition available. + Details
Name: | nvr_DebtBorrowingsDueInThreeYears
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of outstanding debt due within the second year of the balance sheet date. + References No definition available. + Details
Name: | nvr_DebtBorrowingsDueInTwoYears
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of outstanding debt due after the fifth year of the balance sheet date. + References No definition available. + Details
Name: | nvr_DebtBorrowingsDueThereafter
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet of the outstanding debt borrowings. + References No definition available. + Details
Name: | nvr_DebtBorrowingsOutstanding
Namespace Prefix: | nvr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | nvr_ScheduleOfDebtMaturitiesLineItems
Namespace Prefix: | nvr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration