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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015 | Mar. 31, 2015
--- | --- | --- | ---
Assets |  |  |
Securities to be held to maturity | $ 243,337 | $ 243,123 | $ 267,247
Shareholders' equity |  |  |
Common stock, par value per share (usd per share) | $ 0.01 | $ 0.01 | $ 0.01

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