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Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Repurchased common stock shares |  | 3,305 | 2,120
Common stock issued in public stock offering, Shares | 6,325 |  |
Retained Earnings [Member] |  |  |
Cash dividends declared, per common share | $ 0.96 | $ 0.96 | $ 0.96

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