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Stock-Based Compensation Compensation Expense and Related Tax Benefits (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Share-based Payment Arrangement [Abstract]        
Compensation expense $ 2,192 $ 1,875 $ 6,192 $ 5,403
Tax benefit (481) (397) (1,352) (1,144)
Stock-based compensation expense, net of tax benefit $ 1,711 $ 1,478 $ 4,840 $ 4,259