Note 3 - Investment Securities Available for Sale (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]

Available-for-Sale	March 31, 2023
			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
Debt securities:
U.S. Treasury securities	$	9,957	$	-	$	(187	)	$	9,770
U.S. Government-sponsored agencies collateralized by mortgage obligations - residential		257,668		432		(21,375	)		236,725
U.S. Government-agencies collateralized by mortgage obligations - commercial		122,003		618		(11,960	)		110,661
Obligations of states and political subdivisions		141,328		635		(14,703	)		127,260
	$	530,956	$	1,685	$	(48,225	)	$	484,416

Available-for-Sale	December 31, 2022
			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
Debt securities:
U.S. Treasury securities	$	9,950	$	-	$	(243	)	$	9,707
U.S. Government-sponsored agencies collateralized by mortgage obligations - residential		238,253		214		(24,059	)		214,408
U.S. Government-agencies collateralized by mortgage obligations - commercial		112,142		143		(12,704	)		99,581
Obligations of states and political subdivisions		138,541		243		(17,777	)		121,007
	$	498,886	$	600	$	(54,783	)	$	444,703

Schedule of Unrealized Loss on Investments [Table Text Block]

March 31, 2023	Less than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
Debt securities:
U.S. Treasury securities	$	9,770	$	187	$	-	$	-	$	9,770	$	187
U.S. Government-sponsored agencies collateralized by mortgage obligations - residential		78,713		2,504		115,974		18,871		194,687		21,375
U.S. Government-agencies collateralized by mortgage obligations - commercial		35,350		1,172		49,192		10,788		84,542		11,960
Obligations of states and political subdivisions		34,431		645		62,053		14,058		96,484		14,703
	$	158,264	$	4,508	$	227,219	$	43,717	$	385,483	$	48,225

December 31, 2022	Less than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
Debt securities:
U.S. Treasury securities	$	9,707	$	243	$	-	$	-	$	9,707	$	243
U.S. Government-sponsored agencies collateralized by mortgage obligations - residential		140,117		12,070		54,017		11,989		194,134		24,059
U.S. Government-agencies collateralized by mortgage obligations - commercial		42,799		2,845		42,363		9,859		85,162		12,704
Obligations of states and political subdivisions		89,092		11,421		16,768		6,356		105,860		17,777
	$	281,715	$	26,579	$	113,148	$	28,204	$	394,863	$	54,783

Investments Classified by Contractual Maturity Date [Table Text Block]

	Amortized Cost		Estimated Fair Value
Within one year	$	3,930	$	3,886
After one year through five years		13,675		13,521
After five years through ten years		11,063		10,918
After ten years		122,617		108,705
Investment securities not due at a single maturity date:
Government- agencies commercial mortgage-backed securities		122,003		110,661
Government-sponsored agencies residential mortgage-backed securities		257,668		236,725
	$	530,956	$	484,416