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Stock-Based Compensation Expense - Stock-Based Compensation Expense (Detail) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Period for Recognition 1 year 6 months 7 days    
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Stock-based compensation expense $ 31,942,000 $ 20,558,000 $ 21,274,000
Stock-based compensation expense 0 0 1,533,000
Income tax benefit recognized related to stock-based compensation expense 10,473,000 6,747,000 7,127,000
Compensation expense capitalized 0 0 0
Product cost of revenue [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Stock-based compensation expense 1,881,000 1,052,000 1,515,000
Research, development, and engineering expenses      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Stock-based compensation expense 11,022,000 6,271,000 5,194,000
Selling, general, and administrative [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Stock-based compensation expense $ 19,039,000 $ 13,235,000 $ 13,032,000