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Business and Significant Accounting Policies (Detail) - Estimated Future Amortization Expense by Year from Purchased Intangibles - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2016 $ 24,074  
2017 21,468  
2018 18,818  
2019 14,321  
2020 12,449  
Thereafter 5,414  
Finite-lived intangible assets, net $ 96,544 $ 30,689