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Consolidated Statements of Stockholders' Equity (Parenthetical) (unaudited) - $ / shares | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Consolidated Statements of Stockholders' Equity |  |
Number of shares issued for trust preferred securities conversions |  | 529,292
Cash dividend declared (in dollars per share) | $ 0.23 | $ 0.23

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