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Goodwill And Intangible Assets, Net (Tables)
12 Months Ended
Dec. 31, 2011
Goodwill And Intangible Assets, Net [Abstract]  
Changes In Carrying Amount Of Goodwill
Components Of Intangible Assets, Net
Estimated Annual Amortization Expense Related To Amortizing Intangible Assets
     Estimated Annual
Amortization  Expense
 

2012

   $ 43,612   

2013

     29,863   

2014

     27,285   

2015

     18,185   

2016 and thereafter

     30,641   
  

 

 

 

Total accumulated amortization

   $ 149,586