Consolidated Statements of Changes In Stockholders' Equity - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Stockholders' equity, beginning balance at Dec. 31, 2021		$ 371,186	$ 20,800	$ 377,996	$ 54,078	$ 347	$ (82,035)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		12,575			12,575
Other Comprehensive Income (Loss)		(21,144)				(21,144)
Cash Dividends Paid	[1]	(4,325)			(4,325)
Stock Options Exercised, Net		241		135			106
Shares Issued Under the Directors' Stock Plan		99		75			24
Shares Issued Under the Employee Stock Purchase Plan		120		89			31
Shares Issued for Dividend Reinvestment Plans		474		353			121
Stock-Based Compensation Expense		110		110
Purchases of Treasury Stock		(2,093)					(2,093)
Stockholders' equity, ending balance at Mar. 31, 2022		357,243	20,800	378,758	62,328	(20,797)	(83,846)
Stockholders' equity, beginning balance at Dec. 31, 2022		353,538	21,424	400,270	65,401	(49,655)	(83,902)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		8,562			8,562
Other Comprehensive Income (Loss)		5,672				5,672
Cash Dividends Paid		(4,464)			(4,464)
Stock Options Exercised, Net		83		50			33
Shares Issued Under the Directors' Stock Plan		114		85			29
Shares Issued Under the Employee Stock Purchase Plan		120		87			33
Shares Issued for Dividend Reinvestment Plans		472		330			142
Stock-Based Compensation Expense		122		122
Purchases of Treasury Stock		(848)					(848)
Stockholders' equity, ending balance at Mar. 31, 2023		$ 363,371	$ 21,424	$ 400,944	$ 69,499	$ (43,983)	$ (84,513)

[1] Cash dividends paid per share have been adjusted for the September 23, 2022 3% stock dividend.