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Consolidated Balance Sheets (Parentheticals) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Assets [Abstract]    
Investment securities held to maturity, fair value $ 45,890 $ 47,789
Preferred Stock:    
Preferred stock, par value ($ per share) $ 0.01 $ 0.01
Preferred stock, shares authorized 50,000,000 50,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common Stock:    
Common stock, no par value
Common stock, share authorized 50,000,000 50,000,000
Common stock, share issued 16,215,672 16,137,999
Common stock, shares outstanding 16,215,672 16,137,999