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Other Intangible Assets, Net (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Original amount $ 69,942 $ 42,984
Accumulated amortization 28,975 24,589
Other intangible assets, net $ 40,967 18,395
Minimum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives of intangible assets 8 years  
Maximum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives of intangible assets 20 years  
Core Technology    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives of intangible assets 8 years  
Original amount $ 44,422 17,464
Accumulated amortization 9,737 6,927
Other intangible assets, net 34,685 10,537
Trademarks and trade names    
Finite-Lived Intangible Assets [Line Items]    
Original amount 25,520 25,520
Accumulated amortization 19,238 17,662
Other intangible assets, net $ 6,282 $ 7,858
Trademarks and trade names | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives of intangible assets 15 years  
Trademarks and trade names | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives of intangible assets 20 years