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Share Repurchase Program
6 Months Ended
Jun. 30, 2011
Share Repurchase Program/Comprehensive Income [Abstract]  
Share Repurchase Program
 
11.  Share Repurchase Program
 
The Board of Directors has authorized the repurchase of up to $400,000 of shares of the Company’s common stock under the Company’s share repurchase program established on August 5, 2009. Pursuant to this share repurchase program, the Company repurchased 814,605 shares of its common stock and placed them into treasury during the three months ended June 30, 2011 at an aggregate cost of $55,205. During the six months ended June 30, 2011, the Company repurchased and placed into treasury 1,254,933 shares of its common stock at an aggregate cost of $79,997. As of June 30 2011, the Company had remaining authorization to purchase up to an additional $144,310 of shares of its common stock under the share repurchase program.