Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 1,632	$ 1,586
Other comprehensive income (loss), net of tax:
Change in fair value of securities available for sale, net of tax, $(262) and $149, respectively	984	(437)
Reclassification adjustment for gains on securities available for sale, net of tax, $17 and $112, respectively	(62)	(423)
Change in fair value of interest rate swap, net of tax, $24 and $(38), respectively	(92)	143
Total other comprehensive income (loss), net of tax, $(221) and $223, respectively	830	(717)
Total comprehensive income	$ 2,462	$ 869