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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Effective tax rate (in hundredths) 19.50% 20.20% 19.00% 19.30%
Minimum [Member]        
Significant change in unrecognized tax benefits is reasonably possible, estimated range of change, lower bound $ 0   $ 0  
Maximum [Member]        
Significant change in unrecognized tax benefits is reasonably possible, estimated range of change, lower bound $ 9,700   $ 9,700