XML 39 R61.htm IDEA: XBRL DOCUMENT v2.4.1.9

Debt - Additional Information (Detail) (Mortgage Banking [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Mortgage Banking [Member]
Debt Instrument [Line Items]
Repurchase facility minimum pricing rate	2.825%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ResidentialMortgageMember
Debt outstanding under repurchase agreement	$ 0us-gaap_WarehouseAgreementBorrowings / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ResidentialMortgageMember	$ 0us-gaap_WarehouseAgreementBorrowings / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ResidentialMortgageMember
Borrowing base	$ 0nvr_DebtInstrumentBorrowingBaseLimitationAmount / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ResidentialMortgageMember

X

- Definition

Debt instrument borrowing base limitation amount.

+ References

No definition available.

+ Details

Name:	nvr_DebtInstrumentBorrowingBaseLimitationAmount
Namespace Prefix:	nvr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Minimum contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Definition

Carrying value as of the balance sheet date of the outstanding short-term borrowings under a revolving line of credit used by mortgage bankers to finance the origination or purchase of loans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 13

-Article 9

+ Details

Name:	us-gaap_WarehouseAgreementBorrowings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant