Note 4 - Securities (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

Available-for-sale Securities [Table Text Block]

	September 30, 2017
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Available for S ale:
U.S. Government agencies and corporations	$	294,609	$	825	$	3,205	$	292,229
State s and political subdivisions		10,047		142		4		10,185
Mortgage-backed securities		646		65		---		711
Corporate debt securities		6,016		208		26		6,198
Total securities available for sale	$	311,318	$	1,240	$	3,235	$	309,323

	December 31, 201 6
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Available for S ale:
U.S. Government agencies and corporations	$	291,271	$	492	$	6,165	$	285,598
States and political subdivisions		11,482		211		---		11,693
Mortgage-backed securities		845		85		---		930
Corporate debt securities		6,015		20		137		5,898
Other securities		189		---		26		163
Total securities available for sale	$	309,802	$	808	$	6,328	$	304,282

Investments Classified by Contractual Maturity Date [Table Text Block]

	September 30 , 2017
	Amortized Cost		Fair Value
Available for S ale:
Due in one year or less	$	11,256	$	11,231
Due after one year through five years		211,312		209,270
Due after give years through ten years		61,843		61,033
Due after ten years		26,907		27,789
Total securities available for sale	$	311,318	$	309,323

	September 30 , 2017
	Amortized Cost		Fair Value
Held to maturity :
Due in one year or less	$	11,646	$	11,907
Due after one year through five years		25,962		27,339
Due after give years through ten years		23,388		24,207
Due after ten years		68,754		70,406
Total securities held to maturity	$	129,750	$	133,859

Held-to-maturity Securities [Table Text Block]

	September 30, 2017
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Held to M aturity:
U.S. Government agencies and corporations	$	3,934	$	215	$	---	$	4,149
State s and political subdivisions		124,611		3,923		68		128,466
Mortgage-backed securities		225		24		---		249
Corporate debt securities		980		15		---		995
Total securities held to maturity	$	129,750	$	4,177	$	68	$	133,859

	December 31, 201 6
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Held to M aturity:
U.S. Government agencies and corporations	$	3,934	$	201	$	---	$	4,135
States and political subdivisions		129,783		3,579		1,082		132,280
Mortgage-backed securities		265		30		---		295
Corporate debt securities		975		7		---		982
Total securities held to maturity	$	134,957	$	3,817	$	1,082	$	137,692

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

	September 30, 2017
	Less Than 12 Months				12 Months or More
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Temporarily I mpaired S ecurities:
U.S. Gove rnment agencies and corporations	$	176,979	$	1,692	$	87,469	$	1,513
State s and political subdivisions		6,314		32		1,560		40
Corporate debt securities		951		26		---		---
Total	$	184,244	$	1,750	$	89,029	$	1,553

	December 31, 201 6
	Less Than 12 Months				12 Months or More
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Temporarily I mpaired S ecurities:
U.S. Government agencies and corporations	$	260,150	$	6,161	$	996	$	4
States and political subdivisions		31,257		934		1,316		148
Corporate debt securities		3,888		137		---		---
Other securities		---		---		163		26
Total	$	295,295	$	7,232	$	2,475	$	178