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Note 3 - Securities (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

Debt Securities, Available-for-Sale [Table Text Block]

		June 30, 2023
		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Allowance for Credit Losses				Fair Value
Available for Sale:
U.S. Treasuries		$	994			$	-			$	54			$	-			$	940
U.S. Government agencies and corporations			353,788				-				48,887				-				304,901
States and political subdivisions			179,889				-				32,743				-				147,146
Mortgage-backed securities			164,015				-				8,427				-				155,588
Corporate debt securities			6,503				-				900				-				5,603
Total securities available for sale		$	705,189			$	-			$	91,011			$	-			$	614,178

		December 31, 2022
		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
Available for Sale:
U.S. Treasuries		$	992			$	-			$	56			$	936
U.S. Government agencies and corporations			391,538				39				55,002				336,575
States and political subdivisions			190,192				26				38,018				152,200
Mortgage-backed securities			170,694				22				9,239				161,477
Corporate debt securities			6,501				-				837				5,664
Total securities available for sale		$	759,917			$	87			$	103,152			$	656,852

Investments Classified by Contractual Maturity Date [Table Text Block]

		June 30, 2023
		Amortized Cost				Fair Value
Available for Sale:
Due in one year or less		$	1,897			$	1,868
Due after one year through five years			139,460				128,835
Due after five years through ten years			299,548				255,178
Due after ten years			264,284				228,297
Total securities available for sale		$	705,189			$	614,178

Schedule of Temporary Impairment Losses, Investments [Table Text Block]

		June 30, 2023
		Less Than 12 Months								12 Months or More
		Fair Value				Unrealized Loss				Fair Value				Unrealized Loss
U.S. Treasuries		$	-			$	-			$	940			$	54
U.S. Government agencies and corporations			24,782				1,131				280,119				47,756
States and political subdivisions			2,070				35				144,831				32,708
Mortgage-backed securities			4,977				66				150,514				8,361
Corporate debt securities			-				-				5,603				900
Total available for sale securities		$	31,829			$	1,232			$	582,007			$	89,779

		December 31, 2022
		Less Than 12 Months								12 Months or More
		Fair Value				Unrealized Loss				Fair Value				Unrealized Loss
U.S. Treasuries		$	936			$	56			$	-			$	-
U.S. Government agencies and corporations			144,574				12,699				190,950				42,303
States and political subdivisions			94,657				18,373				52,134				19,645
Mortgage-backed securities			144,198				7,326				15,165				1,913
Corporate debt securities			4,843				655				821				182
Total temporarily impaired securities		$	389,208			$	39,109			$	259,070			$	64,043

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