Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands		Capital Stock [Member]		Surplus [Member]		Undivided Profits [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]	Total	Cumulative Effect, Period of Adoption, Adjustment [Member] Undivided Profits [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance at Dec. 31, 2020	[1]	$ 20,041		$ 256,606		$ 313,974	$ 11,936	$ (34,396)	$ 568,161
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		0	[1]	0	[1]	14,083	0	0	14,083
Other comprehensive loss, net of tax		0	[1]	0	[1]	0	(4,668)	0	(4,668)
Stock options exercised	[1]	3		68					71
Cash dividend declared	[2]	0	[1]	0	[1]	(6,571)	0	0	(6,571)
Purchase of treasury stock	[2]	0	[1]	0	[1]	0	0	(45)	(45)
Balance at Mar. 31, 2021	[1]	20,044		256,674		321,486	7,268	(34,441)	571,031
Balance at Dec. 31, 2021		20,046	[1]	256,661	[1]	349,056	12,147	(36,782)	601,128
Balance (ASU 2016-13 [Member]) at Dec. 31, 2021		20,046	[1]	256,661	[1]	345,586	12,147	(36,782)	597,658	$ (3,470)	$ (3,470)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		0	[1]	0	[1]	17,089	0	0	17,089
Other comprehensive loss, net of tax		0	[1]	0	[1]	0	(14,516)	0	(14,516)
Cash dividend declared		0	[1]	0	[1]	(6,727)	0	0	(6,727)
Purchase of treasury stock		0	[1]	0	[1]	0	0	(609)	(609)
Balance at Mar. 31, 2022		$ 20,046	[1]	$ 256,661	[1]	$ 355,948	$ (2,369)	$ (37,391)	$ 592,895

[1] All periods presented have been adjusted for the 1 for 5 reverse stock split which occurred on May 28, 2021.

[2] Share amounts and per share amounts have been adjusted for all periods presented for the 1 for 5 reverse stock split which occurred on May 28, 2021.