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Business and Significant Accounting Policies (Detail) - Estimated Future Amortization Expense by Year from Purchased Intangibles (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2015 $ 8,094us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths  
2016 6,956us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
2017 5,507us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
2018 4,330us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
2019 2,807us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Thereafter 2,995us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive  
Finite-lived intangible assets, net $ 30,689us-gaap_FiniteLivedIntangibleAssetsNet $ 6,107us-gaap_FiniteLivedIntangibleAssetsNet