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Equity-Based Compensation, Profit Sharing and Deferred Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2011
Equity-Based Compensation, Profit Sharing and Deferred Compensation Plans [Abstract] |
Equity-Based Compensation Plan |
|  | Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contract Life (Years) |  |  | Aggregate Intrinsic Value |
Stock Options |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at beginning of period |  |  | 1,053,425 |  |  | $ | 529.18 |  |  |  |  |  |  |  |  |
Granted |  |  | 39,960 |  |  |  | 711.86 |  |  |  |  |  |  |  |  |
Exercised |  |  | (333,380 | ) |  |  | 324.92 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (21,835 | ) |  |  | 669.63 |  |  |  |  |  |  |  |  |
Expired |  |  | (468 | ) |  |  | 769.40 |  |  |  |  |  |  |  |  |
Outstanding at end of period |  |  | 737,702 |  |  | $ | 627.08 |  |  |  | 6.9 |  |  | $ | 43,465 |
Exercisable at end of period |  |  | 258,900 |  |  | $ | 509.73 |  |  |  | 4.1 |  |  | $ | 45,636 |
RSUs (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at beginning of period |  |  | 149,727 |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  | 11,394 |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeited |  |  | (6,638 | ) |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at end of period |  |  | 154,483 |  |  |  |  |  |  |  |  |  |  | $ | 105,975 |
Vested at end of period |  |  | 73,130 |  |  |  |  |  |  |  |  |  |  | $ | 50,167 |
(1) | RSU grants were issued at a $0 exercise price.
Black-Scholes option-pricing model assumptions |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Estimated option life |  |  | 4.79 years |  |  |  | 5.02 years |  |  |  | 4.70 years |
Risk free interest rate (range) |  |  | 0.44% - 2.86% |  |  |  | 0.99% - 2.84% |  |  |  | 1.78% - 3.65% |
Expected volatility (range) |  |  | 31.29% - 37.43% |  |  |  | 34.34% - 41.12% |  |  |  | 31.83% - 41.72% |
Expected dividend rate |  |  | 0.00% |  |  |  | 0.00% |  |  |  | 0.00% |
Weighted average grant-date fair value per share of options granted |  | $ | 230.38 |  |  | $ | 256.35 |  |  | $ | 187.10 |
Exercised option proceeds |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Aggregate exercise proceeds (1) |  | $ | 108,322 |  |  | $ | 78,626 |  |  | $ | 79,157 |
Aggregate intrinsic value on exercise dates |  | $ | 142,381 |  |  | $ | 165,007 |  |  | $ | 135,652 |
(1) | Aggregate exercise proceeds include the option exercise price received in cash or the fair market value of NVR stock surrendered by the optionee in lieu of cash.

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- Definition Tabular disclosure of the valuation method used in calculating the weighted average fair values under the Black-Scholes model. Also includes the assumptions underlying application of the valuation method. + References No definition available. + Details
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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64, 65, A240 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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