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Income Taxes - Additional Information (Detail)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Income Tax Disclosure [Abstract]        
Federal statutory rate     21.00%  
Effective tax rate (27.00%) 35.00% (24.00%) 33.00%