Equity-Based Compensation Expense

6 Months Ended

Jun. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Equity-Based Compensation Expense

7. Equity-Based Compensation Expense

During the six months ended June 30, 2013, the Company issued 35,491 restricted share units (“RSUs”) and 103,074 non-qualified stock options (“Options”) from the 2010 Equity Incentive Plan (“2010 Equity Plan”). Substantially all of the RSUs, which were issued in May 2013, will vest 100% on December 31, 2015, based on continued employment or continued service as a Director, as applicable. The Options were granted at an exercise price equal to the closing price of the Company’s common stock on the New York Stock Exchange on the day prior to the date of grant. Substantially all of the Options granted vest annually in 25% increments beginning on December 31, 2015, based solely on continued employment or continued service as a Director, as applicable. The Options expire 10 years from the date of grant.

To estimate the grant-date fair value of its stock options, the Company uses the Black-Scholes option-pricing model. The Black-Scholes model estimates the per share fair value of an option on its date of grant based on the following factors: the option’s exercise price; the price of the underlying stock on the date of grant; the estimated dividend yield; a “risk-free” interest rate; the estimated option term; and the expected volatility. For the “risk-free” interest rate, the Company uses a U.S. Treasury Strip due in a number of years equal to the option’s expected term. NVR has concluded that its historical exercise experience is the best estimate of future exercise patterns to determine an option’s expected term. To estimate expected volatility, NVR analyzed the historic volatility of its common stock over a period equal to the option’s expected term. The fair value of the Options granted during the six months ended June 30, 2013 was estimated on the grant date using the Black-Scholes option-pricing model based on the following assumptions:

Estimated average option life (years)	5.29
Risk free interest rate (range)	0.42% - 1.42%
Expected volatility (range)	17.98% - 32.72%
Expected dividend rate	0.00%
Grant-date fair value per share of options granted	$278.41

In accordance with ASC Topic 718, Compensation-Stock Compensation, the fair value of the non-vested equity shares is measured as if they were vested and issued on the grant date. Additionally, under ASC 718, service only restrictions on vesting of non-vested equity shares are not reflected in the fair value calculation at the grant date. As a result, the fair value of the RSUs was the closing price of the Company’s common stock on the day immediately preceding the date of grant. The weighted average fair value of the RSUs granted during the six months ended June 30, 2013 was $997.66 per share.

Compensation cost for Options and RSUs is recognized on a straight-line basis over the requisite service period for the entire award (from the date of grant through the period of the last separately vesting portion of the grant). For the recognition of equity-based compensation, the RSUs are treated as a separate award from the Options. Compensation cost is recognized within the income statement in the same expense line as the cash compensation paid to the respective employees or directors. ASC 718 also requires the Company to estimate forfeitures in calculating the expense related to stock-based compensation and requires that the compensation costs of stock-based awards be recognized net of estimated forfeitures. Total stock based compensation expense, net of forfeitures, recognized during the three months ended June 30, 2013 and 2012 was $10,589 and $16,733, respectively, and for the six months ended June 30, 2013 and 2012 was $18,652 and $33,173, respectively.