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Estimated Future Amortization Expense (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]    
2014 $ 47,835us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths  
2015 45,401us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
2016 43,977us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
2017 42,725us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
2018 40,472us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Thereafter 88,144us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive  
Intangible assets, net $ 308,554us-gaap_FiniteLivedIntangibleAssetsNet $ 43,509us-gaap_FiniteLivedIntangibleAssetsNet