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Income Taxes - Income Tax Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Income Tax Disclosure [Abstract]    
Current income tax expense (benefit) $ 3,725 $ 29,412
Deferred income tax expense (benefit) 4,172 (26,089)
Income tax expense, as reported $ 7,897 $ 3,323
Effective tax rate 6.40% 5.70%