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Note 4 - Securities (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

Available-for-sale Securities [Table Text Block]

		March 31, 2018
		Amortized Costs				Gross Unrealized Gains				Gross Unrealized Losses				Fair Values
Available for S ale:
U.S. Government agencies and corporations		$	322,585			$	393			$	8,089			$	314,889
States and political subdivisions			16,101				69				392				15,778
Mortgage-backed securities			558				50				---				608
Corporate debt securities			6,016				42				122				5,936
Total securities available for sale		$	345,260			$	554			$	8,603			$	337,211

		December 31, 2017
		Amortized Costs				Gross Unrealized Gains				Gross Unrealized Losses				Fair Values
Available for S ale:
U.S. Government agencies and corporations		$	312,604			$	609			$	5,494			$	307,719
States and political subdivisions			16,853				100				119				16,834
Mortgage-backed securities			602				57				---				659
Corporate debt securities			6,016				188				29				6,175
Total securities available for sale		$	336,075			$	954			$	5,642			$	331,387

Investments Classified by Contractual Maturity Date [Table Text Block]

		March 31, 2018
		Amortized Cost				Fair Value
Available for S ale:
Due in one year or less		$	47,263			$	46,985
Due after one year through five years			181,571				176,935
Due after give years through ten years			78,203				75,727
Due after ten years			38,223				37,564
Total securities available for sale		$	345,260			$	337,211

		March 31, 2018
		Amortized Cost				Fair Value
Held to maturity :
Due in one year or less		$	12,536			$	12,714
Due after one year through five years			21,962				22,712
Due after give years through ten years			27,323				27,869
Due after ten years			61,084				61,254
Total securities held to maturity		$	122,905			$	124,549

Debt Securities, Held-to-maturity [Table Text Block]

		March 31, 2018
		Amortized Costs				Gross Unrealized Gains				Gross Unrealized Losses				Fair Values
Held to M aturity:
U.S. Government agencies and corporations		$	3,934			$	99			$	1			$	4,032
States and political subdivisions			117,791				2,184				649				119,326
Mortgage-backed securities			196				18				---				214
Corporate debt securities			984				---				7				977
Total securities held to maturity		$	122,905			$	2,301			$	657			$	124,549

		December 31, 2017
		Amortized Costs				Gross Unrealized Gains				Gross Unrealized Losses				Fair Values
Held to M aturity:
U.S. Government agencies and corporations		$	3,934			$	167			$	---			$	4,101
States and political subdivisions			122,039				2,929				173				124,795
Mortgage-backed securities			209				21				---				230
Corporate debt securities			982				5				---				987
Total securities held to maturity		$	127,164			$	3,122			$	173			$	130,113

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

		March 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		$	76,276			$	1,987			$	226,261			$	6,103
States and political subdivisions			29,753				843				2,889				198
Corporate debt securities			4,970				61				909				68
Total		$	110,999			$	2,891			$	230,059			$	6,369

		December 31, 2017
		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		$	68,380			$	871			$	225,738			$	4,623
States and political subdivisions			18,688				194				2,989				98
Corporate debt securities			---				---				948				29
Total		$	87,068			$	1,065			$	229,675			$	4,750

X

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