Note 4 - Securities (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Available-for-sale Securities [Table Text Block]

	June 30, 2019
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Available for Sale:
U.S. Government agencies and corporations	$	287,696	$	1,990	$	749	$	288,937
States and political subdivisions		101,028		1,840		65		102,803
Mortgage-backed securities		519		51		---		570
Corporate debt securities		3,994		44		1		4,037
Total securities available for sale	$	393,237	$	3,925	$	815	$	396,347

	December 31, 2018
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Available for S ale:
U.S. Government agencies and corporations	$	306,264	$	449	$	6,666	$	300,047
States and political subdivisions		118,564		1,218		1,166		118,616
Mortgage-backed securities		586		42		---		628
Corporate debt securities		6,014		---		295		5,719
Total securities available for sale	$	431,428	$	1,709	$	8,127	$	425,010

Investments Classified by Contractual Maturity Date [Table Text Block]

	June 30 , 201 9
	Amortized Cost		Fair Value
Available for S ale:
Due in one year or less	$	63,135	$	63,095
Due after one year through five years		155,427		155,253
Due after five years through ten years		89,199		90,239
Due after ten years		85,476		87,760
Total securities available for sale	$	393,237	$	396,347

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

	June 30, 2019
	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	$	7,302	$	16	$	161,285	$	733
States and political subdivisions		574		65		---		---
Corporate debt securities		---		---		978		1
Total	$	7,876	$	81	$	162,263	$	734

	December 31, 2018
	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	$	17,730	$	216	$	259,992	$	6,450
States and political subdivisions		16,882		352		20,758		814
Corporate debt securities		4,842		194		876		101
Total	$	39,454	$	762	$	281,626	$	7,365