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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2014
Equity [Abstract]  
Share Count and Par Value Data Related to Stockholders' Equity

Share count and par value data related to stockholders’ equity are as follows:

 

     As of  
     December 31,
2014		      December 31,
2013		  

Preferred Stock

      

Par value per share

        $ 0.01                  $ 0.01          

Shares authorized

      10,000,000                10,000,000          

Shares outstanding

      0                0          

Common Stock—Class A

      

Par value per share

        $ 0.01                  $ 0.01          

Shares authorized

      150,000,000                150,000,000          

Shares issued

      72,151,857                72,151,857          

Shares outstanding

      51,654,337                50,349,546          

Treasury stock

      

Shares held

      20,497,520                21,802,311          
Roll forward of Class A Common Shares Outstanding

A roll forward of Class A common shares outstanding is as follows:

 

     Year Ended December 31,  
             2014                      2013                      2012          

Balance at the beginning of the year

      50,349,546              50,908,267              52,095,166        

Repurchases

      0             (1,356,861)             (1,473,863)       

Stock options, rights and ESPP issuances

      726,440              739,148              246,625        

Restricted share issuances

      656,755              241,851              242,238        

Restricted share forfeitures

      (12,490)             (165,610)             (130,119)       

Shares withheld for tax obligations

      (65,914)             (17,249)             (71,780)       
  

 

 

     

 

 

     

 

 

  

Balance at the end of the year

        51,654,337              50,349,546              50,908,267