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Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Assets: |  |
Securities available-for-sale at amortized cost | $ 624,418 | $ 593,381
Securities held-to-maturity at fair value | 1,182 | 1,651
Core deposit intangible, accumulated amortization | $ 8,443 | $ 8,324
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) | 17,607,903 | 17,536,914

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