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