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Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Assets: |  |
Securities available-for-sale at amortized cost | $ 601,544 | $ 602,114
Securities held-to-maturity at fair value | $ 619 | $ 649
Shareholders' equity: |  |
Preferred stock, shares authorized (in shares) | 300,000 | 300,000
Common stock, par value (in dollars per share) | $ 5 | $ 5
Common stock, shares authorized (in shares) | 25,000,000 | 25,000,000
Common stock, shares outstanding (in shares) | 17,767,594 | 17,732,853

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