Goodwill and Other Intangible Assets (Details) (USD $)
9 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross $ 1,377,179,000 $ 117,849,000
Finite-Lived Intangible Assets, Accumulated Amortization 118,782,000 48,072,000
Finite-Lived Intangible Assets, Net 1,258,397,000 69,777,000
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]    
Future amortization expense, remainder of 2012 51,400,000  
Future amortization expense, 2013 195,200,000  
Future amortization expense, 2014 179,900,000  
Future amortization expense, 2015 164,800,000  
Future amortization expense, 2016 143,500,000  
Future amortization expense, after 2016 523,600,000  
Customer Relationships [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 1,329,874,000 92,274,000
Finite-Lived Intangible Assets, Accumulated Amortization 104,849,000 39,158,000
Finite-Lived Intangible Assets, Net 1,225,025,000 53,116,000
Acquired Software [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 3,765,000 3,765,000
Finite-Lived Intangible Assets, Accumulated Amortization 3,710,000 3,522,000
Finite-Lived Intangible Assets, Net 55,000 243,000
Trademarks/Trade Names [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 14,070,000 12,320,000
Finite-Lived Intangible Assets, Accumulated Amortization 5,808,000 2,831,000
Finite-Lived Intangible Assets, Net 8,262,000 9,489,000
Noncompete Agreements [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 6,990,000 7,810,000
Finite-Lived Intangible Assets, Accumulated Amortization 3,796,000 2,226,000
Finite-Lived Intangible Assets, Net 3,194,000 5,584,000
Licenses [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 22,480,000 1,680,000
Finite-Lived Intangible Assets, Accumulated Amortization 619,000 335,000
Finite-Lived Intangible Assets, Net $ 21,861,000 $ 1,345,000