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Goodwill and Intangible Assets, Net - Estimated Amortization Expense (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]    
2015 $ 14,938us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths  
2016 11,710us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
2017 10,469us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
2018 9,373us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
2019 8,395us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Thereafter 48,618us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive  
Net Carrying Amount $ 103,503us-gaap_FiniteLivedIntangibleAssetsNet $ 122,406us-gaap_FiniteLivedIntangibleAssetsNet