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Stock-Based Compensation - Schedule of Total Stock-Based Compensation Expense Included in Company's Condensed Consolidated Statements of Operations and Comprehensive Income (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |
Total pre-tax stock-based compensation expense | $ 8.8 | $ 6.8 | $ 18.8 | $ 15.3
Cost of Revenues [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |
Total pre-tax stock-based compensation expense | 0.8 | 0.9 | 1.8 | 1.9
Research and Development [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |
Total pre-tax stock-based compensation expense | 1.1 | 0.9 | 2.2 | 2.0
Selling, General and Administrative [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |
Total pre-tax stock-based compensation expense | $ 6.9 | 4.9 | $ 14.8 | 10.8
Acquisition and Integration Costs [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |
Total pre-tax stock-based compensation expense |  | $ 0.1 |  | $ 0.6

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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