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Goodwill and Intangible Assets - Estimated Amortization Expense for Remainder of 2017 and Succeeding Years (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]    
Remainder 2017 $ 32,818  
2018 42,074  
2019 40,074  
2020 37,889  
2021 36,376  
Thereafter 149,876  
Net carrying value $ 339,107 $ 347,640