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Amortization Expense (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]  
2015 $ 22,183us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
2016 19,054us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2017 17,649us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2018 16,670us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2019 $ 16,228us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive