Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2018	$ 87,599	$ 8,573	$ 11,992	$ 68,587	$ (1,553)
Net income	2,571			2,571
Other comprehensive income (loss)	1,690				1,690
Vesting of restricted stock awards, stock incentive plan		25	(25)
Stock-based compensation expense	86		86
Issuance of common stock, dividend investment plan	116	9	107
Repurchase and retirement of common stock	(47)	(3)	(44)
Dividends declared	(830)			(830)
Balance at Mar. 31, 2019	91,185	8,604	12,116	70,328	137
Balance at Dec. 31, 2018	87,599	8,573	11,992	68,587	(1,553)
Net income	6,928
Other comprehensive income (loss)	3,208
Balance at Sep. 30, 2019	94,630	8,532	11,472	72,971	1,655
Balance at Mar. 31, 2019	91,185	8,604	12,116	70,328	137
Net income	2,126			2,126
Other comprehensive income (loss)	1,304				1,304
Stock-based compensation expense	116		116
Issuance of common stock, dividend investment plan	179	15	164
Issuance of common stock, employee benefit plan	138	10	128
Repurchase and retirement of common stock	(1,451)	(110)	(1,341)
Dividends declared	(855)			(855)
Balance at Jun. 30, 2019	92,742	8,519	11,183	71,599	1,441
Net income	2,231			2,231
Other comprehensive income (loss)	214				214
Vesting of restricted stock awards, stock incentive plan		6	(6)
Stock-based compensation expense	217		217
Issuance of common stock, dividend investment plan	85	7	78
Dividends declared	(859)			(859)
Balance at Sep. 30, 2019	94,630	8,532	11,472	72,971	1,655
Balance at Dec. 31, 2019	96,326	8,529	11,406	74,909	1,482
Net income	2,441			2,441
Other comprehensive income (loss)	2,816				2,816
Vesting of restricted stock awards, stock incentive plan		25	(25)
Stock-based compensation expense	114		114
Issuance of common stock, dividend investment plan	111	9	102
Repurchase and retirement of common stock	(1,116)	(97)	(1,019)
Dividends declared	(893)			(893)
Balance at Mar. 31, 2020	99,799	8,466	10,578	76,457	4,298
Balance at Dec. 31, 2019	96,326	8,529	11,406	74,909	1,482
Net income	8,666
Other comprehensive income (loss)	2,160
Balance at Sep. 30, 2020	103,883	8,472	10,862	80,907	3,642
Balance at Mar. 31, 2020	99,799	8,466	10,578	76,457	4,298
Net income	2,819			2,819
Other comprehensive income (loss)	(361)				(361)
Stock-based compensation expense	114		114
Issuance of common stock, employee benefit plan	86	7	79
Dividends declared	(888)			(888)
Balance at Jun. 30, 2020	101,569	8,473	10,771	78,388	3,937
Net income	3,406			3,406
Other comprehensive income (loss)	(295)				(295)
Vesting of restricted stock awards, stock incentive plan		8	(8)
Stock-based compensation expense	166		166
Issuance of common stock, dividend investment plan	130	13	117
Issuance of common stock, employee benefit plan	119	9	110
Repurchase and retirement of common stock	(325)	(31)	(294)
Dividends declared	(887)			(887)
Balance at Sep. 30, 2020	$ 103,883	$ 8,472	$ 10,862	$ 80,907	$ 3,642