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Income Taxes - Additional Information (Detail) - USD ($) | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Income Taxes [Line Items] |  |
Effective income tax rate | 25.30% | 30.10%
Minimum [Member] |  |
Income Taxes [Line Items] |  |
Reasonably possible decrease in unrecognized tax benefits | $ 1,400,000 |
Maximum [Member] |  |
Income Taxes [Line Items] |  |
Reasonably possible decrease in unrecognized tax benefits | $ 3,600,000 |

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