Land Under Development (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2011
Land Under Development (Textuals) [Abstract]
Number of raw parcels of land acquired	3
Purchase price of raw parcels of land	$ 78,500
Number of finished lots for use in homebuilding operations	850

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nvr_NumberOfFinishedLotsIntendedToBeDevelopedFromRawParcelsOfLand

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nvr

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xbrli:integerItemType

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instant