Note 7 - Investment Securities (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

Marketable Securities [Table Text Block]

March 31, 2018 (In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Available For Sale
Obligations of U.S. government-sponsored entities	$	42,633	$	14	$	691	$	41,956
Obligations of states and political subdivisions		109,652		281		2,365		107,568
Mortgage-backed securities – residential		186,441		318		5,158		181,601
Mortgage-backed securities – commercial		49,990		-		2,116		47,874
Asset-backed securities		15,538		8		29		15,517
Corporate debt securities		7,741		49		18		7,772
Total securities – available for sale	$	411,995	$	670	$	10,377	$	402,288
Held To Maturity
Obligations of states and political subdivisions	$	3,350	$	74	$	-	$	3,424

December 31, 2017 (In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Available For Sale
Obligations of U.S. government-sponsored entities	$	43,601	$	44	$	437	$	43,208
Obligations of states and political subdivisions		114,960		562		1,273		114,249
Mortgage-backed securities – residential		195,605		523		2,735		193,393
Mortgage-backed securities – commercial		50,518		42		1,208		49,352
Asset-backed securities		15,569		9		4		15,574
Corporate debt securities		7,578		1		37		7,542
Total securities – available for sale	$	427,831	$	1,181	$	5,694	$	423,318
Held To Maturity
Obligations of states and political subdivisions	$	3,364	$	114	$	-	$	3,478

Investments Classified by Contractual Maturity Date [Table Text Block]

	Available For Sale				Held To Maturity
	Amortized		Estimated		Amortized		Estimated
March 31, 2018 (In thousands)	Cost		Fair Value		Cost		Fair Value
Due in one year or less	$	28,921	$	28,872	$	-	$	-
Due after one year through five years		52,222		51,572		-		-
Due after five years through ten years		55,496		53,726		1,232		1,289
Due after ten years		38,925		38,643		2,118		2,135
Mortgage-backed securities		236,431		229,475		-		-
Total	$	411,995	$	402,288	$	3,350	$	3,424

Realized Gain (Loss) on Investments [Table Text Block]

	Three Months Ended
	March 31,
(In thousands)	2018		2017
Gross realized gains	$	-	$	-
Gross realized losses		-		9
Net realized loss	$	-	$	(9	)

Schedule of Unrealized Loss on Investments [Table Text Block]

	Less than 12 Months				12 Months or More				Total
March 31, 2018 (In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. government-sponsored entities	$	13,336	$	182	$	27,010	$	509	$	40,346	$	691
Obligations of states and political subdivisions		52,756		956		33,058		1,409		85,814		2,365
Mortgage-backed securities – residential		74,591		1,642		93,924		3,516		168,515		5,158
Mortgage-backed securities – commercial		14,798		378		33,076		1,738		47,874		2,116
Asset-backed securities		11,721		29		-		-		11,721		29
Corporate debt securities		2,721		15		498		3		3,219		18
Total	$	169,923	$	3,202	$	187,566	$	7,175	$	357,489	$	10,377

	Less than 12 Months				12 Months or More				Total
December 31, 2017 (In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. government-sponsored entities	$	11,544	$	43	$	25,298	$	394	$	36,842	$	437
Obligations of states and political subdivisions		40,402		413		33,965		860		74,367		1,273
Mortgage-backed securities – residential		77,312		481		99,986		2,254		177,298		2,735
Mortgage-backed securities – commercial		7,758		62		34,139		1,146		41,897		1,208
Asset-backed securities		1,166		4		-		-		1,166		4
Corporate debt securities		7,251		36		200		1		7,451		37
Total	$	145,433	$	1,039	$	193,588	$	4,655	$	339,021	$	5,694