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Product Warranties - Summary of Changes in Product Warranties Reserve (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Product Warranties Disclosures [Abstract] |  |
Warranty reserve, beginning of period | $ 94,060 us-gaap_ProductWarrantyAccrual | $ 101,507 us-gaap_ProductWarrantyAccrual
Provision | 9,081 nvr_CostsAccruedForNewWarrantyContractsAndChangesInEstimatesForPreExistingWarranties | 10,260 nvr_CostsAccruedForNewWarrantyContractsAndChangesInEstimatesForPreExistingWarranties
Payments | (13,398)us-gaap_ProductWarrantyAccrualPayments | (13,002)us-gaap_ProductWarrantyAccrualPayments
Warranty reserve, end of period | $ 89,743 us-gaap_ProductWarrantyAccrual | $ 98,765 us-gaap_ProductWarrantyAccrual

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- Definition Represents the aggregate increase in the liability for accruals related to standard and extended product warranties issued during the reporting period and changes in estimates for pre-existing warranties. + References No definition available. + Details
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- Details
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. + 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 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 5 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(5)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Represents the aggregate decrease in the liability related to payments to satisfy claims for standard and extended product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(2)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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