Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 1,586	$ 768
Other comprehensive income (loss), net of tax:
Change in fair value of securities available for sale, net of tax of $149 and $(192), respectively	(437)	373
Reclassification adjustment for gain included in net income, net of tax, $112 and $0, respectively	(423)
Interest rate swap, net of tax of $(38) and $(7), respectively	143	14
Total other comprehensive income (loss), net of tax of $223 and $(199), respectively	(717)	387
Total comprehensive income	$ 869	$ 1,155