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Income Taxes - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Contingency [Line Items] |  |  |  |
Federal income tax rate | 21.00% | 35.00% | 35.00% |
Tax cuts and jobs act of 2017, change in tax rate, income tax expense (benefit) |  | $ 18,100,000 |  |
Income tax benefit related to repatriation provision |  | 500,000 |  |
Increase in income taxes | $ 2,500,000 |  |  |
Tax cuts and jobs act of 2017, change in tax rate, deferred income tax expense |  | 39,000,000 |  |
Tax cuts and jobs act of 2017, reversal of valuation allowance |  | 6,800,000 |  |
Tax cuts and jobs act of 2017, change in tax rate, deferred income tax benefit |  | 18,100,000 |  |
Valuation allowance | 30,029,000 | 7,405,000 |  |
Research and development, tax credit | (100,000) | 3,900,000 | $ 0 |
Unremitted earnings of subsidiaries outside the United States, reinvested | 29,000,000 | 0 |  |
Deferred tax liability | 0 |  |  |
Gross unrecognized tax benefits | 29,600,000 | 26,900,000 | $ 14,200,000 | $ 12,200,000
Unrecognized tax benefits that would impact effective tax rate | $ 19,800,000 |  |  |
Maximum [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Percentage of deduction in GILTI Income | 50.00% |  |  |
Gross unrecognized tax benefits balance may decrease within the next twelve months | $ 6,500,000 |  |  |
Minimum [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Gross unrecognized tax benefits balance may decrease within the next twelve months | 0 |  |  |
United States - Federal [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax Cuts and Jobs Act of 2017, incomplete accounting, transition tax for accumulated foreign earnings, provisional income tax expense |  | 41,800,000 |  |
Net operating loss carryforwards | $ 37,600,000 |  |  |
Net operating loss carryforwards expiration year | 2037 |  |  |
Tax credit carryforwards | $ 11,200,000 |  |  |
Tax credit carryforwards expiration year | 2036 |  |  |
Foreign Tax Authority [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax Cuts and Jobs Act of 2017, incomplete accounting, transition tax for accumulated foreign earnings, provisional income tax expense |  | 3,800,000 |  |
Net operating loss carryforwards | $ 2,700,000 |  |  |
Net operating loss carryforwards expiration year | 2023 |  |  |
Tax credit carryforwards | $ 2,400,000 |  |  |
Tax credit carryforwards expiration year | 2027 |  |  |
State and Local Jurisdiction [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax Cuts and Jobs Act of 2017, incomplete accounting, transition tax for accumulated foreign earnings, provisional income tax expense |  | $ 300,000 |  |
Net operating loss carryforwards | $ 201,700,000 |  |  |
Tax credit carryforwards | $ 200,000 |  |  |
Tax credit carryforwards expiration year | 2019 |  |  |
State and Local Jurisdiction [Member] | Maximum [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Net operating loss carryforwards expiration year | 2038 |  |  |
State and Local Jurisdiction [Member] | Minimum [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Net operating loss carryforwards expiration year | 2019 |  |  |

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