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Share-Based Payments
6 Months Ended
Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Share-Based Payments
Share-Based Payments
 
During the six months ended June 30, 2014, the Company granted 166,081 stock options with an exercise price equal to the closing market price of a share of Common Stock on the date of grant. The fair value of each option is estimated on the date of grant using the Black-Scholes option pricing model, which resulted in a weighted average grant date fair value per share of $6.89. During the six months ended June 30, 2014, the Company also granted 87,373 shares of time-based restricted stock and 67,010 shares of total return-based restricted stock with weighted average grant date fair values per share of $37.63 and $35.25, respectively. We recorded share-based compensation expense of $1.1 million and $1.3 million during the three months ended June 30, 2014 and 2013, respectively, and $5.4 million and $4.7 million during the six months ended June 30, 2014 and 2013, respectively. At June 30, 2014, there was $5.5 million of total unrecognized share-based compensation costs, which will be recognized over a weighted average remaining contractual term of 2.5 years.