Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other comprehensive income (loss), net of tax:
Change in fair value of securities available for sale, tax	$ (567)	$ (586)	$ 43
Reclassification adjustment for gain on securities available for sale, tax	208	17	176
Change in fair value of interest rate swap, tax	72	66	(36)
Change in unrecognized benefit obligation for Supplemental Executive Retirement Plan, tax	33	(4)	(4)
Other comprehensive income (loss), tax	$ (254)	$ (507)	$ 179