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Shareholders' Equity
 3 Months Ended
Mar. 31, 2015
Stockholders' Equity Note [Abstract]  
Shareholders' Equity
Shareholders’ equity

During the three months ended March 31, 2015, we declared a cash dividend of $0.08 per common share for a total of $29.4 million and repurchased 4.6 million shares under our repurchase authorization for a total of $99.6 million. Such repurchases are reflected as reductions of common stock and retained earnings. At March 31, 2015, we had remaining authorization to repurchase $638.8 million of common shares.

Under our stock-based compensation plans, we accept shares as payment under certain conditions related to stock option exercises and vesting of shares, generally related to the payment of minimum tax obligations. During the three months ended March 31, 2015 and 2014, employees surrendered shares valued at $8.3 million and $5.5 million, respectively, under these plans. Such share transactions are excluded from the above noted share repurchase authorization.