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Stock Options and Restricted Stock Awards
 3 Months Ended
Mar. 31, 2012
Stock Options and Restricted Stock Awards [Abstract]  
Stock Options and Restricted Stock Awards

5 – Stock Options and Restricted Stock Awards

Valuation and Expense Information

The Company accounts for stock-based compensation in accordance with Accounting Standards Codification (“ASC”) 718-10, “Compensation – Stock Compensation,” which requires the measurement and recognition of compensation expense for all share-based payment awards made to the Company’s employees and directors including employee stock options, restricted share awards and employee stock purchases related to the Employee Stock Purchase Plan based on estimated fair values. Stock-based compensation expense, calculated using the Black-Scholes option-pricing model and included in selling, general and administrative expense, was $3.1 million for the three months ended March 31, 2012, and $2.6 million for the three months ended March 31, 2011. As of March 31, 2012, there was $13.8 million of total unrecognized compensation cost related to non-vested share-based compensation arrangements to be recognized over a weighted-average period of 2.53 years.