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Consolidated Statements of Changes in Stockholders' Equity Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Unrealized holding gain on marketable securities-taxes |  | $ (28) | $ (30)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax | $ 134 | $ 333 | $ (276)
Common Stock, Dividends, Per Share, Cash Paid | $ 0.15 | $ 0.57 | $ 0.53
Payments to Acquire Businesses, Gross | $ 0 | $ 37,173 | $ 0

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