Stock-based Compensation

3 Months Ended

Mar. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation

Stock-based Compensation

The fair value of each stock option grant was established at the date of grant using the Black-Scholes option pricing model. The Black-Scholes model used the following weighted-average assumptions for options granted during the three months endedMarch 31, 2014 and 2013, respectively: risk-free interest rates of 2.0% and 1.4%; volatility factors of the expected market price of the Company's common stock of 34% and 41%; assumed forfeiture rates of 10.30% and 11.12%; weighted-average expected lives of the options of 7.2 years and 7.5 years; and no cash dividends in either year. For the three months endedMarch 31, 2014 and 2013, respectively, options vest at 25% per year after one year from date of grant. Using these assumptions, the weighted-average fair value of options granted for the three months endedMarch 31, 2014 and 2013 was $7.72 and $7.55 per option, respectively. In the first three months of 2014, the Company granted 116,990 options to purchase shares of the Company's stock at exercise prices ranging from $19.55 to $21.57 per share.

The Company recorded net stock-based compensation expense of approximately $51,000 and $191,000 during the first three months ended March 31, 2014 and March 31, 2013, respectively. In accordance with Financial Accounting Standards Board (FASB) guidance on stock-based payments, during the first quarters of 2014 and 2013 the Company reversed $238,000 and $135,000, respectively, of expense that had been recorded in prior periods as a result of the reconcilement of projected option forfeitures to actual option forfeitures for all stock options granted during the first quarters of 2010 and 2009, respectively.