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Share Repurchases (Tables)
3 Months Ended
Mar. 31, 2012
Share Repurchases [Abstract]  
Stock repurchase and issuance activity
                         
    Shares     Weighted
Average
Price Per
Share
    Amount  

Cumulative balance at December 31, 2011

    35,643     $ 16.96     $ 604,331  

Issuance of Class A Common Stock

    (293     18.45       (5,397
   

 

 

           

 

 

 

Cumulative balance at March 31, 2012

    35,350       16.94     $ 598,934  
   

 

 

           

 

 

 
       

Cumulative balance at January 1, 2011

    23,713     $ 16.40     $ 388,817  

Repurchase of Class A Common Stock

    46       19.49       906  

Issuance of Class A Common Stock

    (479     19.01       (9,121
   

 

 

           

 

 

 

Cumulative balance at April 2, 2011

    23,280       16.35     $ 380,602