Note 6 - Investment Securities (Tables)

6 Months Ended

Jun. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Schedule of AFS and HTM Reconciliation [Table Text Block]

June 30, 2015 (In thousands)	Amortized Cost		Gross UnrealizedGains		Gross UnrealizedLosses		Estimated Fair Value
Available For Sale
Obligations of U.S. government-sponsored entities	$	131,378	$	411	$	632	$	131,157
Obligations of states and political subdivisions		136,908		2,248		681		138,475
Mortgage-backed securities – residential		323,087		6,531		1,361		328,257
Mortgage-backed securities – commercial		13,106		78		14		13,170
Corporate debt securities		6,881		19		514		6,386
Mutual funds and equity securities		883		2		33		852
Total securities – available for sale	$	612,243	$	9,289	$	3,235	$	618,297
Held To Maturity
Obligations of states and political subdivisions	$	3,703	$	168	$	-	$	3,871

December 31, 2014 (In thousands)	Amortized Cost		Gross UnrealizedGains		Gross UnrealizedLosses		Estimated Fair Value
Available For Sale
Obligations of U.S. government-sponsored entities	$	110,094	$	369	$	1,015	$	109,448
Obligations of states and political subdivisions		133,563		2,600		397		135,766
Mortgage-backed securities – residential		363,729		7,959		1,199		370,489
Mortgage-backed securities – commercial		2,515		7		10		2,512
Corporate debt securities		6,639		26		358		6,307
Mutual funds and equity securities		1,889		2		25		1,866
Total securities – available for sale	$	618,429	$	10,963	$	3,004	$	626,388
Held To Maturity
Obligations of states and political subdivisions	$	3,728	$	195	$	-	$	3,923

Investments Classified by Contractual Maturity Date [Table Text Block]

	Available For Sale				Held To Maturity
	Amortized		Estimated		Amortized		Estimated
June 30, 2015 (In thousands)	Cost		Fair Value		Cost		Fair Value
Due in one year or less	$	12,034	$	12,062	$	-	$	-
Due after one year through five years		156,768		157,760		-		-
Due after five years through ten years		92,094		92,396		705		799
Due after ten years		14,270		13,800		2,998		3,072
Mortgage-backed securities		336,194		341,427		-		-
Total	$	611,360	$	617,445	$	3,703	$	3,871

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

	Three Months Ended					Six Months Ended
	June 30,					June 30,
(In thousands)	2015		2014			2015		2014
Gross realized gains	$	50	$	19		$	180	$	178
Gross realized losses		5		103			15		253
Net realized gain (loss)	$	45	$	(84	)	$	165	$	(75	)

Schedule of Unrealized Loss on Investments [Table Text Block]

	Less than 12 Months				12 Months or More				Total
June 30, 2015 (In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. government-sponsored entities	$	50,661	$	378	$	19,648	$	254	$	70,309	$	632
Obligations of states and political subdivisions		47,962		538		8,103		143		56,065		681
Mortgage-backed securities – residential		93,303		662		23,454		699		116,757		1,361
Mortgage-backed securities – commercial		2,739		14		-		-		2,739		14
Corporate debt securities		287		5		5,379		509		5,666		514
Mutual funds and equity securities		565		20		70		13		635		33
Total	$	195,517	$	1,617	$	56,654	$	1,618	$	252,171	$	3,235

	Less than 12 Months				12 Months or More				Total
December 31, 2014 (In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. government-sponsored entities	$	22,696	$	76	$	60,892	$	939	$	83,588	$	1,015
Obligations of states and political subdivisions		20,746		81		21,272		316		42,018		397
Mortgage-backed securities – residential		37,451		82		71,311		1,117		108,762		1,199
Mortgage-backed securities – commercial		-		-		723		10		723		10
Corporate debt securities		76		4		5,525		354		5,601		358
Mutual funds and equity securities		305		11		95		14		400		25
Total	$	81,274	$	254	$	159,818	$	2,750	$	241,092	$	3,004