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Stock-Based Compensation - Pre-Tax Effect Within Consolidated Statements of Operations of Recording Stock-Based Compensation (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total pre-tax stock-based compensation expense | $ 49,194 | $ 27,262 | $ 24,378
Cost of Revenues [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total pre-tax stock-based compensation expense | 2,789 | 3,516 | 3,894
Research and Development Expense [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total pre-tax stock-based compensation expense | 3,847 | 2,750 | 2,816
Selling, General and Administrative Expenses [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total pre-tax stock-based compensation expense | 20,457 | $ 20,996 | $ 17,668
Acquisition and Integration Related Expenses [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total pre-tax stock-based compensation expense | 21,728 |  |
Restructuring Related Expense [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total pre-tax stock-based compensation expense | $ 373 |  |

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