CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement Of Stockholders Equity [Abstract]
Tax on change in unrealized loss on securities available for sale	$ 597	$ 826	$ 826	$ 394
Accretion on change in unrecognized loss on securities held to maturity, portion of OTTI	$ 3	$ 6	$ 6	$ 3
Common stock dividends per share (in dollars per share)	$ 0.18	$ 0.18	$ 0.18	$ 0.08
Issuance of common shares under Stock Incentive Plan (in shares)	2,200	19,450	19,450	51,200