Shareholders' Equity

6 Months Ended

Jun. 30, 2012

Stockholders' Equity Note [Abstract]

Stockholders' Equity [Text Block]

Shareholders' Equity

Share-Repurchase Program

In October 2011, the company's Board of Directors (the "Board") approved the repurchase of up to $150,000 of the company's common stock through a share-repurchase program. In June 2012, the company's Board approved an additional repurchase of up to $200,000 of the company's common stock. As of June 30, 2012, the company repurchased 4,035,802 shares under these programs with a market value of $149,664 at the dates of repurchase.