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Stockholders' Equity
6 Months Ended
Jun. 30, 2011
Stockholders' Equity  
Stockholders' Equity

(11) Stockholders’ Equity

 

The following demonstrates the change in the number of shares of Class A common stock outstanding during the six months ended June 30, 2011 and during the fiscal year ended December 31, 2010:

 

 

 

Six Months

 

Twelve Months

 

 

 

Ended

 

Ended

 

 

 

June 30,

 

December 31,

 

 

 

2011

 

2010

 

Shares outstanding as of beginning of period

 

91,725

 

93,883

 

Shares issued as part of equity-based compensation plans and the Employee Stock Purchase Plan (“ESPP”), net of RSUs surrendered

 

389

 

461

 

Shares repurchased into treasury stock

 

 

(2,619

)

Shares outstanding as of end of period

 

92,114

 

91,725