Note 3 - Investment Securities (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of AFS and HTM Reconciliation [Table Text Block]

December 31, 2016 (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

December 31, 2015 (In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Available For Sale
Obligations of U.S. government-sponsored entities	$	107,135	$	309	$	538	$	106,906
Obligations of states and political subdivisions		147,875		2,604		213		150,266
Mortgage-backed securities – residential		294,140		5,210		1,489		297,861
Mortgage-backed securities – commercial		20,655		52		123		20,584
Corporate debt securities		6,629		11		800		5,840
Mutual funds and equity securities		814		-		69		745
Total securities – available for sale	$	577,248	$	8,186	$	3,232	$	582,202
Held To Maturity
Obligations of states and political subdivisions	$	3,611	$	198	$	-	$	3,809

Investments Classified by Contractual Maturity Date [Table Text Block]

	Available For Sale				Held To Maturity
December 31, 2016 (In thousands)	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	19,743	$	19,762	$	-	$	-
Due after one year through five years		87,628		87,504		-		-
Due after five years through ten years		85,007		83,317		570		630
Due after ten years		20,183		19,528		2,918		2,967
Mortgage-backed securities		272,653		269,920		-		-
Total	$	485,214	$	480,031	$	3,488	$	3,597

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

(In thousands)	2016		2015		2014
Gross realized gains	$	4,191	$	224	$	190
Gross realized losses		193		53		253
Net realized gain (loss)	$	3,998	$	171	$	(63	)
Income tax provision (benefit) related to net realized gain (loss)	$	1,399	$	60	$	(22	)

Schedule of Unrealized Loss on Investments [Table Text Block]

	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

	Less than 12 Months				12 Months or More				Total
December 31, 2015 (In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. government-sponsored entities	$	57,927	$	275	$	21,576	$	263	$	79,503	$	538
Obligations of states and political subdivisions		30,426		123		8,276		90		38,702		213
Mortgage-backed securities – residential		118,978		851		21,723		638		140,701		1,489
Mortgage-backed securities – commercial		10,882		123		-		-		10,882		123
Corporate debt securities		204		6		5,155		794		5,359		800
Mutual funds and equity securities		481		21		264		48		745		69
Total	$	218,898	$	1,399	$	56,994	$	1,833	$	275,892	$	3,232