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Income Taxes - Income Tax (Benefit) Expense (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Components Of Income Tax Expense Benefit Continuing Operations [Abstract] |  |  |  |
Income tax (benefit) expense | $ (43,280) | $ 40,099 | $ 6,938 | $ 45,787
Effective tax rate | 22.80% | 25.80% |  | 28.20%

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