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Business Segment, Geographic Area, Product and Significant Customer Information - Schedule of Net Revenues and Long-Lived Assets by Geographic Regions (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net revenues $ 487,152 $ 486,267 $ 1,614,567 $ 1,404,177  
Long-lived assets 214,538   214,538   $ 203,154
United States [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net revenues 243,273 237,592 801,811 700,291  
Long-lived assets 138,549   138,549   124,689
Korea [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net revenues 43,468 60,908 164,462 165,613  
Japan [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net revenues 38,964 38,411 151,325 113,068  
Asia (Excluding Korea and Japan) [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net revenues 105,336 94,084 313,913 273,957  
Long-lived assets 49,801   49,801   49,645
Europe [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net revenues 56,111 $ 55,272 183,056 $ 151,248  
Long-lived assets $ 26,188   $ 26,188   $ 28,820