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Stock-Based Compensation (Schedule of RSU activity) (Details) - Restricted Stock [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
RSU compensation expense | $ 1,065 | $ 1,035 | $ 792
Income tax benefit | (242) | (217) | (166)
RSU compensation expense, net of income taxes | 823 | 818 | 626
Total grant-date fair value of vested RSUs at end of period | $ 1,042 | $ 764 | $ 568

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