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Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Assets: |  |
Securities available-for-sale at amortized cost | $ 604,413 | $ 608,939
Securities held-to-maturity at fair value | 858 | 867
Core deposit intangible, accumulated amortization | $ 8,602 | $ 8,483
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) | 17,677,977 | 17,628,695

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