Consolidated Statements of Changes In Stockholders' Equity - USD ($) $ in Thousands		Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-In Capital	Additional Paid-In Capital Cumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock	Treasury Stock Cumulative Effect, Period of Adoption, Adjusted Balance
Stockholders' equity, beginning balance at Dec. 31, 2020		$ 334,392	$ 120	$ 334,512	$ 20,194	$ 20,194	$ 353,662	$ 353,662	$ 41,899	$ 120	$ 42,019	$ (816)	$ (816)	$ (80,547)	$ (80,547)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		13,280							13,280
Other Comprehensive Income (Loss)		(2,280)										(2,280)
Cash Dividends Paid	[1]	(4,036)							(4,036)
Stock Options Exercised, Net		156					94							62
Shares Issued Under the Directors' Stock Plan		98					70							28
Shares Issued Under the Employee Stock Purchase Plan		124					86							38
Shares Issued for Dividend Reinvestment Plans		455					342							113
Stock-Based Compensation Expense		104					104
Stockholders' equity, ending balance at Mar. 31, 2021		342,413			20,194		354,358		51,263			(3,096)		(80,306)
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		(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)

[1] Cash dividends paid per share have been adjusted for the September 24, 2021 3% stock dividend.