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Stock-Based Compensation (Schedule of PSU Activity) (Details) - Performance Shares [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
PSU compensation expense $ 1,344 $ 1,262 $ 822
Income tax benefit (305) (265) (173)
PSU compensation expense, net of income taxes 1,039 997 649
Total grant-date fair value of vested PSUs at end of period $ 1,143