Note 4 - Securities (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

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

	September 30, 2021
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Available for Sale:
U.S. Government agencies and corporations	$	220,372	$	3,062	$	3,243	$	220,191
States and political subdivisions		196,518		4,970		2,181		199,307
Mortgage-backed securities		215,661		3,284		193		218,752
Corporate debt securities		3,004		259		27		3,236
Total securities available for sale	$	635,555	$	11,575	$	5,644	$	641,486

	December 31, 2020
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Available for Sale:
U.S. Government agencies and corporations	$	86,859	$	4,477	$	173	$	91,163
States and political subdivisions		196,435		7,778		252		203,961
Mortgage-backed securities		244,780		4,473		78		249,175
Corporate debt securities		2,001		442		-		2,443
Total securities available for sale	$	530,075	$	17,170	$	503	$	546,742

Investments Classified by Contractual Maturity Date [Table Text Block]

	September 30, 2021
	Amortized Cost		Fair Value
Available for Sale:
Due in one year or less	$	1,864	$	1,902
Due after one year through five years		8,722		8,785
Due after five years through ten years		264,217		265,751
Due after ten years		360,752		365,048
Total securities available for sale	$	635,555	$	641,486

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

	September 30, 2021
	Less Than 12 Months				12 Months or More
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Temporarily Impaired Securities:
U.S. Government agencies and corporations	$	156,418	$	3,190	$	944	$	53
States and political subdivisions		71,912		1,868		9,026		313
Mortgage-backed securities		10,229		46		5,146		147
Corporate debt securities		976		27		-		-
Total	$	239,535	$	5,131	$	15,116	$	513

	December 31, 2020
	Less Than 12 Months				12 Months or More
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Temporarily Impaired Securities:
U.S. Government agencies and corporations	$	28,798	$	173	$	-	$	-
States and political subdivisions		32,353		249		635		3
Mortgage-backed securities		8,816		76		4,060		2
Total	$	69,967	$	498	$	4,695	$	5