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Income Taxes - Provision for Income Taxes and Effective Income Tax Rates (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Income Tax Disclosure [Abstract]        
Provision (benefit) for income taxes $ 999 $ (406) $ 856 $ (900)
Effective income tax rate 4.90% (17.90%) 2.40% (2195.10%)