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Estimated Amortization Expense for Future Fiscal Years Based on Capitalized Software and Other Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]    
Net Balance $ 190,591 $ 127,900
Software
   
Finite-Lived Intangible Assets [Line Items]    
Remainder of 2013 8,771  
2014 32,075  
2015 26,017  
2016 22,204  
2017 18,612  
2018 17,840  
Thereafter 50,744  
Net Balance 176,263  
Other Intangible Assets
   
Finite-Lived Intangible Assets [Line Items]    
Remainder of 2013 4,737  
2014 17,600  
2015 14,273  
2016 13,299  
2017 12,626  
2018 12,116  
Thereafter 115,940  
Net Balance $ 190,591