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Equity-Based Compensation, Profit Sharing and Deferred Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Equity-Based Compensation Plans with Grants Outstanding | The following table provides a summary of each of the Company’s equity-based compensation plans for any plan with grants outstanding at December 31, 2016:
Equity-Based Compensation Plans |  | Shares Authorized |  |  | Options/RSUs Outstanding |  |  | Shares Available to Issue |
1998 Management Long-Term Stock Option Plan |  |  | 1,000 |  |  |  | 6 |  |  |  | — |
1998 Directors' Long-Term Stock Option Plan |  |  | 150 |  |  |  | 5 |  |  |  | — |
2000 Broadly-Based Stock Option Plan |  |  | 2,000 |  |  |  | 118 |  |  |  | — |
2010 Equity Incentive Plan (1) |  |  | 700 |  |  |  | 282 |  |  |  | 44 |
2014 Equity Incentive Plan (2) |  |  | 950 |  |  |  | 681 |  |  |  | 269 |
| (1) | During 2010, the Company’s shareholders approved the 2010 Equity Incentive Plan (the “2010 Plan”). The 2010 Plan authorizes the Company to issue Options and RSUs to key management employees, including executive officers and Board members. Of the 700 aggregate shares available to issue, up to 240 may be granted in the form of RSUs. There were 266 Options and 16 RSUs outstanding as of December 31, 2016. Of the 44 shares available to be issued under the 2010 Plan, 38 may be granted as RSUs.
| (2) | During 2014, the Company’s shareholders approved the 2014 Equity Incentive Plan (the “2014 Plan”). The 2014 Plan authorizes the Company to issue Options to key management employees, including executive officers and Board members. Option grants under the 2014 Plan are generally divided such that vesting for 50% of the Option grant is solely contingent upon continued employment or continued service as a Director, while vesting for the remaining 50% of the Option grant is contingent upon both continued employment or service as a Director and the achievement of a performance metric. The performance metric is based on the Company’s return on capital performance during a specified three year period based on the date of Option grant, with the initial performance period being 2014 through 2016. Options granted under the 2014 Plan vest annually over four years in 25% increments beginning on December 31, 2016, or later based on the date of grant.
Equity-Based Compensation Plans | The following table provides additional information relative to NVR’s equity-based compensation plans for the year ended December 31, 2016:
|  | Shares |  |  | Weighted Avg. Per Share Exercise Price |  |  | Weighted Avg. Remaining Contract Life (years) |  |  | Aggregate Intrinsic Value |
Stock Options |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2015 |  |  | 1,096 |  |  | $ | 998.88 |  |  |  |  |  |  |  |  |
Granted |  |  | 74 |  |  |  | 1,658.88 |  |  |  |  |  |  |  |  |
Exercised |  |  | (50 | ) |  |  | 768.06 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (44 | ) |  |  | 1,154.56 |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2016 |  |  | 1,076 |  |  | $ | 1,048.38 |  |  |  | 6.6 |  |  | $ | 667,937 |
Exercisable at December 31, 2016 |  |  | 423 |  |  | $ | 875.22 |  |  |  | 5.3 |  |  | $ | 335,584 |
RSUs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2015 |  |  | 51 |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |
Vested |  |  | (33 | ) |  |  |  |  |  |  |  |  |  |  |  |
Forfeited |  |  | (2 | ) |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2016 |  |  | 16 |  |  |  |  |  |  |  |  |  |  | $ | 26,622 |
Vested, but not issued at December 31, 2016 |  |  | 6 |  |  |  |  |  |  |  |  |  |  | $ | 9,997 |
Black-Scholes Option-Pricing Model Assumptions | The fair value of the Options granted during 2016, 2015 and 2014 was estimated on the grant date using the Pricing Model, based on the following assumptions:
|  | 2016 |  |  | 2015 |  |  | 2014 |
Estimated option life |  | 5.27 years |  |  | 5.17 years |  |  | 5.16 years |
Risk free interest rate (range) |  | 0.86%-2.21% |  |  | 1.04%-2.07% |  |  | 1.06%-2.49% |
Expected volatility (range) |  | 15.91%-23.49% |  |  | 17.00%-26.79% |  |  | 18.26%-30.57% |
Expected dividend rate |  |  | 0.00% |  |  |  | 0.00% |  |  |  | 0.00% |
Weighted average grant-date fair value per share of options granted |  | $ | 320.21 |  |  | $ | 296.50 |  |  | $ | 267.66 |
Exercised Option Proceeds | Information with respect to the vested RSUs and exercised Options is as follows:
|  | Year Ended December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Aggregate exercise proceeds (1) |  | $ | 38,106 |  |  | $ | 85,948 |  |  | $ | 76,153 |
Aggregate intrinsic value on exercise dates |  | $ | 96,600 |  |  | $ | 99,288 |  |  | $ | 62,136 |
(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 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 Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 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 + Details
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- Definition Tabular disclosure of the amount of cash proceeds received from the exercise of stock options and similar instruments granted under share-based payment arrangements and the tax benefit realized from stock options exercised during the period. Disclosure may also include the intrinsic value of stock options exercised during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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