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Stock Repurchase Program	3 Months Ended
	Mar. 31, 2013
Stock Repurchase Program	13. Stock Repurchase Program On December 14, 2011, the Company announced that its Board of Directors had authorized the repurchase of $150.0 million of the Company’s outstanding common stock. During the first three months of 2013, the Company repurchased 121,263 shares of common stock for $5.1 million, or $42.47 per share, under this authorization. Of these shares, 41,263 shares were purchased for $1.8 million during the last several days of March and were subsequently settled and retired in April. All of the remaining shares purchased during the first quarter were retired prior to March 31, 2013. As of March 31, 2013, $100.7 million of the $150.0 million authorization remained available for repurchase of the Company’s common stock.

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- Definition

The entire disclosure for an entity's treasury stock, including the average cost per share, carrying basis for each class of treasury stock, description of share repurchase program authorized by an entity's board of directors, the number of shares repurchased, the cost of the shares repurchased, the remaining maximum dollar value of shares available for repurchase under the program, the treatment of the purchase price in excess of the current market value, number of shares held for each class of treasury stock, and other information necessary to a fair presentation.

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