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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Taxes [Line Items] |  |  |  |
Corporate income tax rate percent |  | 35.00% |  |
Net one-time non-cash provisional income tax benefit |  | $ 44,889 |  |
Measurement period for analysis of changes in tax act |  | 1 year |  |
Deemed reptriated foreign earnings |  | $ 352,632 |  |
Net transition tax on deemed repatriated foreign earnings |  | 14,512 |  |
Undistributed foreign earnings |  |  | $ 251,439 | $ 316,346
Valuation allowance against deferred assets – non-current |  | 35,246 | 14,524 |
Gross unrecognized tax benefits, including interest and penalties |  | 20,232 | 18,190 |
Unrecognized tax benefit that if recognized would impact effective tax rate |  | 20,232 | 18,190 |
Accrued for interest and penalties |  | $ 5,288 | $ 4,111 |
Foreign | Significant Portion of Tax Credit Carryforwards |  |  |  |
Income Taxes [Line Items] |  |  |  |
Tax credit carryforwards expiring year |  | 2024 |  |
State | Minimum |  |  |  |
Income Taxes [Line Items] |  |  |  |
Net operating losses carried forward expiring period |  | 5 years |  |
State | Maximum |  |  |  |
Income Taxes [Line Items] |  |  |  |
Net operating losses carried forward expiring period |  | 20 years |  |
Net operating losses carried forward expiring year |  | 2037 |  |
Scenario Forecast |  |  |  |
Income Taxes [Line Items] |  |  |  |
Corporate income tax rate percent | 21.00% |  |  |

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