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Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parentheticals) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
AOCI Attributable to Parent [Member] |  |  |  |
Other comprehensive income (loss), tax | $ (517) | $ (220) | $ (1,141) | $ 1,234
Retained Earnings [Member] |  |  |  |
Cash dividend, per share (in dollars per share) |  |  | $ 0.58 | $ 0.56
Cash dividend, per share (in dollars per share) | $ 0 | $ 0 | $ 0.58 | $ 0.56

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