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Note 4 - Investment Securities (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Marketable Securities [Table Text Block]

						Gross				Gross
		Amortized				Unrealized				Unrealized				Fair
(In thousands)		Cost				Gains				Losses				Value
December 31, 2017:
Securities available for sale:
Agency mortgage-backed securities		$	114,902			$	-			$	2,253			$	112,649
Agency CMO			15,660				1				338				15,323
Other debt securities:
Agency notes and bonds			70,013				-				985				69,028
Municipal obligations			73,303				1,274				405				74,172
Total securities available for sale		$	273,878			$	1,275			$	3,981			$	271,172
Securities held to maturity:
Agency mortgage-backed securities		$	1			$	-			$	-			$	1
Total securities held to maturity		$	1			$	-			$	-			$	1
December 31, 2016:
Securities available for sale:
Agency mortgage-backed securities		$	110,493			$	93			$	2,349			$	108,237
Agency CMO			16,293				23				288				16,028
Other debt securities:
Agency notes and bonds			69,407				14				759				68,662
Municipal obligations			63,189				783				1,129				62,843
Total securities available for sale		$	259,382			$	913			$	4,525			$	255,770
Securities held to maturity:
Agency mortgage-backed securities		$	2			$	-			$	-			$	2
Total securities held to maturity		$	2			$	-			$	-			$	2

Investments Classified by Contractual Maturity Date [Table Text Block]

		Securities Available for Sale								Securities Held to Maturity
		Amortized				Fair				Amortized				Fair
		Cost				Value				Cost				Value
(In thousands)
Due in one year or less		$	2,642			$	2,636			$	-			$	-
Due after one year through five years			77,309				76,343				-				-
Due after five years through ten years			29,553				29,611				-				-
Due after ten years			33,812				34,610				-				-
			143,316				143,200				-				-
Mortgage-backed securities and CMO			130,562				127,972				1				1
		$	273,878			$	271,172			$	1			$	1

Schedule of Unrealized Loss on Investments [Table Text Block]

		Number of								Gross
		Investment				Fair				Unrealized
(Dollars in thousands)		Positions				Value				Losses
December 31, 2017:
Continuous loss position less than twelve months:
Agency mortgage-backed securities			37			$	37,570			$	400
Agency CMO			6				3,036				38
Agency notes and bonds			4				11,119				69
Municipal obligations			20				10,955				83
Total less than twelve months			67				62,680				590
Continuous loss position more than twelve months:
Agency mortgage-backed securities			60				74,960				1,853
Agency CMO			18				11,801				300
Agency notes and bonds			19				57,909				916
Municipal obligations			29				14,667				322
Total more than twelve months			126				159,337				3,391
Total securities available for sale			193			$	222,017			$	3,981

		Number of								Gross
		Investment				Fair				Unrealized
(Dollars in thousands)		Positions				Value				Losses
December 31, 2016:
Continuous loss position less than twelve months:
Agency mortgage-backed securities			78			$	101,838			$	2,336
Agency CMO			13				11,767				239
Agency notes and bonds			20				59,126				759
Municipal obligations			54				28,414				1,129
Total less than twelve months			165				201,145				4,463
Continuous loss position more than twelve months:
Agency mortgage-backed securities			1				531				13
Agency CMO			5				2,502				49
Total more than twelve months			6				3,033				62
Total securities available for sale			171			$	204,178			$	4,525

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