Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 2,606	$ 2,586	$ 5,089	$ 5,126
Other comprehensive income
Unrealized gains arising during the period	617	762	1,157	1,511
Amortization of discount on securities transferred to held-to-maturity	16	15	30	30
Income tax effect	(133)	(163)	(249)	(323)
Other comprehensive income	500	614	938	1,218
Total comprehensive income	$ 3,106	$ 3,200	$ 6,027	$ 6,344