CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement Of Stockholders Equity [Abstract]
Tax on change in unrealized loss on securities available for sale	$ 229	$ (394)
Accretion on change in unrecognized loss on securities held to maturity, portion of OTTI	$ 3	$ 3
Common stock dividends per share (in dollars per share)	$ 0.09	$ 0.08
Issuance of common shares under Stock Incentive Plan (in shares)	17,250	51,200