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Shareholders' Equity (Schedule of Restricted Stock And Cash Entitlements Expense) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Stockholders' Equity Note [Abstract] |  |  |
Restricted Stock Expense | $ 1,051 | $ 1,287 | $ 1,355
Cash Entitlement Expense | 995 | 639 | 718
Tax Effect | (531) | (499) | (542)
Net of Tax | $ 1,515 | $ 1,427 | $ 1,531

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