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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Securities, fair value | $ 470,006 | $ 469,871
Common stock, par value | $ 1.00 | $ 1.00
Common stock, shares authorized | 40,000,000 | 40,000,000
Common stock, shares issued | 31,894,563 | 31,621,870
Common stock, shares outstanding | 31,894,563 | 31,621,870
Accumulated other comprehensive income, tax expense (benefit) | $ (795) | $ 59
Senior Preferred Stock [Member] |  |
Preferred stock, par value | $ 1.00 | $ 1.00
Preferred stock, shares authorized | 10,000,000 | 10,000,000
Preferred stock, shares issued | 0 | 0
Cumulative Preferred Stock [Member] |  |
Preferred stock, par value | $ 5.00 | $ 5.00
Preferred stock, shares authorized | 900,000 | 900,000
Preferred stock, shares issued | 0 | 0

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