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Stock-Based Incentive Plans (Summary of Share-Based Compensation, Stock Option Activity) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]      
Weighted average grant date fair value of SARs granted during the year (in dollars per share) $ 29.22 $ 15.73 $ 31.22
Aggregate intrinsic value of SARs and stock options exercised during the year (in thousands) $ 12,223 $ 773 $ 2,064