Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 2,800	$ 2,695	$ 7,889	$ 7,821
Other comprehensive income (loss)
Unrealized (losses) gains arising during the period	(202)	275	955	1,786
Amortization of discount on securities transferred to held-to-maturity	17	15	47	45
Income tax effect	39	(61)	(210)	(384)
Other comprehensive income (loss)	(146)	229	792	1,447
Total comprehensive income	$ 2,654	$ 2,924	$ 8,681	$ 9,268