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Stockholders' Equity
 3 Months Ended
Mar. 31, 2013
Stockholders' Equity

14. Stockholders’ Equity

On June 6, 2012, our Board of Directors authorized a two-year stock repurchase program of up to $250.0 million (the “2012 Repurchase Program”). During the three months ended March 31, 2013, we repurchased and retired 826,800 shares of our common stock for an average price per share of $34.78, with a value equivalent to approximately $28.8 million. During the year ended December 31, 2012 we repurchased and retired 1,681,029 shares of our common stock for an average price per share of $29.76 with a value equivalent to approximately $50.0 million. As of March 31, 2013, a balance of approximately $171.2 million remained available under the Repurchase Program.