Parent Company Financial Information, Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statements of Income [Abstract]
Other operating expenses	$ (35,477)	$ (33,940)	$ (32,163)
Income tax benefit	(4,501)	(5,670)	(4,744)
Net income	12,161	14,721	12,551
Parent Company [Member]
Statements of Income [Abstract]
Dividends from subsidiary	0	0	0
Other operating expenses	(242)	(247)	(226)
Income tax benefit	70	73	66
Loss before undistributed earnings of subsidiary	(172)	(174)	(160)
Equity in undistributed earnings of subsidiary	12,333	14,895	12,711
Net income	$ 12,161	$ 14,721	$ 12,551