(7)                     Share-Based Compensation

Stock option activity for the three months ended March 31, 2013 is as follows:

The Company’s outstanding stock options include time-based stock options which vest over differing periods ranging from the date of issuance up to 48 months from the option grant date, performance-based stock options which vest upon achieving operating income margins of six, eight and ten percent as reported in four of five consecutive quarters over the term of the options, performance-based stock options which vest upon achieving cumulative annual net sales revenue growth targets over a rolling two-year period subject to the Company maintaining at least an eight percent operating income margin during the applicable period, and performance-based stock options which vest upon achieving annual net sales targets over a rolling one-year period.

During the three-month period ended March 31, 2013, the Company granted options to purchase 548 shares of common stock under the 2012 Incentive Plan to the Company’s executive officers and other employees, which are composed of both time-based stock options and net sales revenue performance-based stock options. These options were issued with a weighted-average exercise price of $15.01 per share and a weighted-average grant date fair value of $6.17 per share. All of the options issued have an option termination date of ten years from the option grant date.

The fair value of each option grant was estimated on the date of the grant using the Black-Scholes option-pricing model with the following weighted-average assumptions for the three-month period ended March 31, 2013:

Expected option lives and volatilities are based on historical data of the Company. The risk free interest rate is calculated as the average U.S. Treasury bill rate that corresponds with the option life.  The dividend yield is based on the Company’s historical and expected amount of dividend payouts, at the time of grant.

Share-based compensation expense from time-based stock options for the three-month period ended March 31, 2013 and 2012 was approximately $1,074 and $313, respectively; the related tax benefit was approximately $424 and $125, respectively. As of March 31, 2013 and December 31, 2012, the unrecognized share-based compensation expense related to the grants described above was $4,379 and $2,715, respectively. As of March 31, 2013, the remaining compensation cost is expected to be recognized over the weighted-average period of approximately 2.2 years.

The Company recorded shared-based compensation expense of $0 and $323 and a related tax benefit of approximately $0 and $128 for the three months ended March 31, 2013 and 2012, respectively, for the performance-based stock options. As of December 31, 2012, there is no remaining compensation expense to be recognized for the operating income performance-based stock options.

The Company has not recognized any share-based compensation expense related to the net sales revenue performance-based stock options for the quarter ended March 31, 2013.  Should the Company attain all of the net sales revenue metrics related to the net sales revenue performance-based stock option grants, the Company would recognize up to $1,100 of potential share-based compensation expense.

At March 31, 2013, the aggregate intrinsic value of outstanding stock options to purchase 2,243 shares of common stock, exercisable stock options to purchase 1,061 shares of common stock and stock options to purchase 962 shares of common stock that are expected to vest was $6,013, $5,451 and $534, respectively. At December 31, 2012, the aggregate intrinsic value of outstanding options to purchase 1,784 shares of common stock, the exercisable options to purchase 1,011 shares of common stock, and options to purchase 644 shares of common stock expected to vest was $5,315, $5,016 and $281, respectively.

Restricted stock unit activity for the period ended March 31, 2013 is as follows:

RSUs are valued at the market value on the date of grant.  Due to post-vesting restrictions, a Finnerty Model was utilized to calculate a valuation discount from the market value of common shares reflecting the restriction embedded in the RSUs preventing the sale of the underlying shares over a certain period of time. The Finnerty Model proposes to estimate a discount for lack of marketability such as transfer restrictions by using an option pricing theory. This model has gained recognition through its ability to address the magnitude of the discount by considering the volatility of a company’s stock price and the length of restriction. The concept underpinning the Finnerty Model is that restricted stock cannot be sold over a certain period of time.

Share-based compensation expense from RSUs for the period ended March 31, 2013 was approximately $74 and the related tax benefit was approximately $29. As of March 31, 2013 and December 31, 2012, the unrecognized share-based compensation expense related to the grants described above was $25 and $99, respectively. As of March 31, 2013, the remaining compensation expense is expected to be recognized over the weighted average period of approximately 0.2 years.