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Stock-based Compensation Expense Restricted and Performance Stock Unit Activity (Details) - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures [Abstract]      
Outstanding, Units 478,396 463,390 428,913
Outstanding, Weighted Average Grant Date Fair Value $ 48.00 $ 43.52 $ 38.43
Granted, Units 318,844 202,883 210,555
Granted, Weighted Average Grant Date Fair Value $ 43.01 $ 56.45 $ 49.06
Forfeited, Units (9,754) (17,341) (9,041)
Forfeited, Weighted Average Grant Date Fair Value $ 48.35 $ 50.27 $ 41.68
Vested, Units (212,676) (170,536) (167,037)
Vested, Weighted Average Grant Date Fair Value $ 40.33 $ 45.67 $ 37.52
Outstanding, Units 574,810 478,396 463,390
Outstanding, Weighted Average Grant Date Fair Value $ 48.07 $ 48.00 $ 43.52