Note 6 - Investment Securities (Tables)

3 Months Ended

Mar. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Schedule of AFS and HTM Reconciliation [Table Text Block]

March 31, 2016 (In thousands)	Amortized Cost		Gross UnrealizedGains		Gross UnrealizedLosses		Estimated Fair Value
Available For Sale
Obligations of U.S. government-sponsored entities	$	121,411	$	751	$	11	$	122,151
Obligations of states and political subdivisions		126,300		2,783		117		128,966
Mortgage-backed securities – residential		300,220		6,946		208		306,958
Mortgage-backed securities – commercial		21,467		249		6		21,710
Corporate debt securities		7,363		16		1,352		6,027
Mutual funds and equity securities		917		-		47		870
Total securities – available for sale	$	577,678	$	10,745	$	1,741	$	586,682
Held To Maturity
Obligations of states and political subdivisions	$	3,598	$	228	$	-	$	3,826

December 31, 2015 (In thousands)	Amortized Cost		Gross UnrealizedGains		Gross UnrealizedLosses		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
	Amortized		Estimated		Amortized		Estimated
March 31, 2016 (In thousands)	Cost		Fair Value		Cost		Fair Value
Due in one year or less	$	11,605	$	11,634	$	-	$	-
Due after one year through five years		163,820		165,394		-		-
Due after five years through ten years		66,708		68,367		640		740
Due after ten years		12,941		11,749		2,958		3,086
Mortgage-backed securities		321,687		328,668		-		-
Total	$	576,761	$	585,812	$	3,598	$	3,826

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

	Three Months Ended
	March 31,
(In thousands)	2016		2015
Gross realized gains	$	162	$	130
Gross realized losses		79		10
Net realized gain	$	83	$	120

Schedule of Unrealized Loss on Investments [Table Text Block]

	Less than 12 Months				12 Months or More				Total
March 31, 2016 (In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. government-sponsored entities	$	19,509	$	6	$	9,992	$	5	$	29,501	$	11
Obligations of states and political subdivisions		20,199		106		5,338		11		25,537		117
Mortgage-backed securities – residential		5,814		5		27,245		203		33,059		208
Mortgage-backed securities – commercial		2,567		6		-		-		2,567		6
Corporate debt securities		150		1		4,605		1,351		4,755		1,352
Mutual funds and equity securities		595		10		275		37		870		47
Total	$	48,834	$	134	$	47,455	$	1,607	$	96,289	$	1,741

	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