Stockholders' Equity - Stock-Based Awards and Employee Stock Purchases (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
Stock-based compensation expense | $ 58,854 | $ 54,148 | $ 52,943 |
Cost of net revenues | |||
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
Stock-based compensation expense | 3,330 | 3,966 | 3,938 |
Selling, general and administrative | |||
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
Stock-based compensation expense | 46,550 | 42,612 | 40,813 |
Research and development | |||
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
Stock-based compensation expense | $ 8,974 | $ 7,570 | $ 8,192 |