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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
Other comprehensive income (loss), tax | $ 3,063 | $ 950 | $ (635)
Cash dividend, per share (in dollars per share) | $ 1.39 | $ 1.39 | $ 1.21
Stock repurchase, shares (in shares) | 57,554 | 468,400 |

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