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Goodwill and Other Intangibles - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]      
Goodwill $ 355,614 $ 359,819  
Goodwill foreign currency translation adjustments (4,000)    
Intangible assets, gross foreign currency translation adjustments (23,000)    
Intangible assets, accumulated amortization foreign currency translation adjustments (17,000)    
Amortization expense 50,000 $ 45,000 $ 45,000
Future amortization expense, year 1 51,000    
Future amortization expense, year 2 51,000    
Future amortization expense, year 3 51,000    
Future amortization expense, year 4 51,000    
Future amortization expense, year 5 $ 51,000