Share Repurchases	12 Months Ended
Dec. 31, 2012
Share Repurchases	Note 18: Share Repurchases In July 2011, our Board of Directors authorized a share repurchase program, which allows us to purchase up to $150.0 million of our common stock through open market repurchases, negotiated transactions, or other means, in accordance with applicable securities laws and other restrictions. For the year ended December 31, 2012, we repurchased 2.1 million shares of our common stock under the program through prepaid variable share repurchase agreements for an aggregate cost of $75.0 million and an average price per share of $36.20. From the inception of the program to December 31, 2012, we have repurchased 3.7 million shares of our common stock under the program for an aggregate cost of $125.0 million and an average price per share of $33.72. In November 2012, our Board of Directors authorized an additional share repurchase program, which allows us to purchase up to an additional $200.0 million of our common stock through open market repurchases, negotiated transactions, or other means, in accordance with applicable securities laws and other restrictions. For the year ended December 31, 2012, we did not repurchase any shares of our common stock under the $200.0 million program.

Share Repurchases

12 Months Ended

Dec. 31, 2012

Note 18: Share Repurchases

In July 2011, our Board of Directors authorized a share repurchase program, which allows us to purchase up to $150.0 million of our common stock through open market repurchases, negotiated transactions, or other means, in accordance with applicable securities laws and other restrictions. For the year ended December 31, 2012, we repurchased 2.1 million shares of our common stock under the program through prepaid variable share repurchase agreements for an aggregate cost of $75.0 million and an average price per share of $36.20. From the inception of the program to December 31, 2012, we have repurchased 3.7 million shares of our common stock under the program for an aggregate cost of $125.0 million and an average price per share of $33.72.

In November 2012, our Board of Directors authorized an additional share repurchase program, which allows us to purchase up to an additional $200.0 million of our common stock through open market repurchases, negotiated transactions, or other means, in accordance with applicable securities laws and other restrictions. For the year ended December 31, 2012, we did not repurchase any shares of our common stock under the $200.0 million program.