Consolidated Statements Of Changes In Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Balance (in shares) at Dec. 31, 2020	23,790,589
Balance at Dec. 31, 2020	$ 2,379	$ 105,547	$ 295,622	$ 3,570	$ 407,118
Net income			11,267		11,267
Other comprehensive loss				(4,395)	(4,395)
Repurchase of common stock (in shares)	(107,887)
Repurchase of common stock	$ (11)	(1,989)			(2,000)
Shares withheld upon the vesting and conversion of RSUs (in shares)	(16,918)
Shares withheld upon the vesting and conversion of RSUs	$ (2)	(318)			(320)
Common stock issued under stock compensation plans (in shares)	94,627
Common stock issued under stock compensation plans	$ 10	152			162
Common stock issued under dividend reinvestment and stock purchase plan (in shares)	22,341
Common stock issued under dividend reinvestment and stock purchase plan	$ 2	416			418
Stock-based compensation		390			390
Cash dividends declared			(4,518)		(4,518)
Balance (in shares) at Mar. 31, 2021	23,782,752
Balance at Mar. 31, 2021	$ 2,378	104,198	302,371	(825)	408,122
Balance (in shares) at Dec. 31, 2021	23,240,596
Balance at Dec. 31, 2021	$ 2,324	93,480	320,321	(2,313)	413,812
Net income			12,083		12,083
Other comprehensive loss				(27,684)	(27,684)
Repurchase of common stock (in shares)	(202,886)
Repurchase of common stock	$ (20)	(4,480)			(4,500)
Shares withheld upon the vesting and conversion of RSUs (in shares)	(25,628)
Shares withheld upon the vesting and conversion of RSUs	$ (3)	(542)			(545)
Common stock issued under stock compensation plans (in shares)	75,483
Common stock issued under stock compensation plans	$ 8	8			16
Common stock issued under dividend reinvestment and stock purchase plan (in shares)	18,505
Common stock issued under dividend reinvestment and stock purchase plan	$ 2	380			382
Stock-based compensation		516			516
Cash dividends declared			(4,619)		(4,619)
Balance (in shares) at Mar. 31, 2022	23,106,070
Balance at Mar. 31, 2022	$ 2,311	$ 89,362	$ 327,785	$ (29,997)	$ 389,461