Note 3 - Investment Securities (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of AFS and HTM Reconciliation [Table Text Block]

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
Mutual funds and equity securities		864		71		-		935
Total securities – available for sale	$	428,695	$	1,252	$	5,694	$	424,253
Held To Maturity
Obligations of states and political subdivisions	$	3,364	$	114	$	-	$	3,478

December 31, 201 6 (In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Available For Sale
Obligations of U.S. government-sponsored entities	$	71,941	$	213	$	460	$	71,694
Obligations of states and political subdivisions		134,055		773		2,536		132,292
Mortgage-backed securities – residential		225,489		1,505		2,687		224,307
Mortgage-backed securities – commercial		47,164		6		1,557		45,613
Corporate debt securities		6,565		1		441		6,125
Mutual funds and equity securities		824		20		11		833
Total securities – available for sale	$	486,038	$	2,518	$	7,692	$	480,864
Held To Maturity
Obligations of states and political subdivisions	$	3,488	$	109	$	-	$	3,597

Investments Classified by Contractual Maturity Date [Table Text Block]

	Available For Sale				Held To Maturity
December 31, 2017 (In thousands)	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	27,301	$	27,276	$	-	$	-
Due after one year through five years		50,953		50,676		-		-
Due after five years through ten years		63,345		62,451		1,232		1,322
Due after ten years		40,109		40,170		2,132		2,156
Mortgage-backed securities		246,123		242,745		-		-
Total	$	427,831	$	423,318	$	3,364	$	3,478

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

(In thousands)	201 7		201 6		201 5
Gross realized gains	$	501	$	4,191	$	224
Gross realized losses		481		193		53
Net realized gain	$	20	$	3,998	$	171
Income tax provision related to net realized gain	$	7	$	1,399	$	60

Schedule of Unrealized Loss on Investments [Table Text Block]

	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

	Less than 12 Months				12 Months or More				Total
December 31, 2016 (In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. government-sponsored entities	$	51,657	$	460	$	-	$	-	$	51,657	$	460
Obligations of states and political subdivisions		91,728		2,526		1,999		10		93,727		2,536
Mortgage-backed securities – residential		154,397		2,485		5,841		202		160,238		2,687
Mortgage-backed securities – commercial		43,309		1,557		-		-		43,309		1,557
Corporate debt securities		536		6		5,476		435		6,012		441
Mutual funds and equity securities		128		2		113		9		241		11
Total	$	341,755	$	7,036	$	13,429	$	656	$	355,184	$	7,692