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Income Taxes - Additional Information (Detail) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Income Tax Contingency [Line Items] |  |  |
Pretax income | $ 15,584,000 | $ 10,014,000 |
Income tax expense (benefit) | 7,190,000 | $ 2,608,000 |
Decrease in valuation allowance | (1,000,000.0) |  |
Gross unrecognized tax benefits | 47,200,000 |  | $ 46,300,000
Unrecognized tax benefits that would impact effective tax rate | 36,700,000 |  |
Minimum [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Gross unrecognized tax benefits balance may decrease within the next twelve months | 0 |  |
Maximum [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Gross unrecognized tax benefits balance may decrease within the next twelve months | 6,300,000 |  |
United States - Federal [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Income tax expense (benefit) | 0 |  |
Net operating loss carryforwards | 4,500,000 |  |
Foreign Tax Authority [Member] | Germany [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Income tax expense (benefit) | $ 500,000 |  |

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