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Income Taxes - Schedule of Effective Tax Rate (Detail)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Income Tax Disclosure [Abstract]        
Effective tax rate (percentage) 10.50% 90.00% 24.00% 559.30%