Note 3 - Investment Securities (Tables)

12 Months Ended

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Schedule of AFS and HTM Reconciliation [Table Text Block]

December 31, 2014 (In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		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

December 31, 2013 (In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Available For Sale
Obligations of U.S. government-sponsored entities	$	96,750	$	155	$	3,155	$	93,750
Obligations of states and political subdivisions		132,311		2,056		2,397		131,970
Mortgage-backed securities – residential		379,238		5,071		6,232		378,077
Mortgage-backed securities – commercial		748		-		59		689
Corporate debt securities		7,266		40		1,049		6,257
Mutual funds and equity securities		2,082		15		20		2,077
Total securities – available for sale	$	618,395	$	7,337	$	12,912	$	612,820
Held To Maturity
Obligations of states and political subdivisions	$	765	$	62	$	-	$	827

Investments Classified by Contractual Maturity Date [Table Text Block]

	Available For Sale				Held To Maturity
December 31, 2014 (In thousands)	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	7,951	$	7,970	$	-	$	-
Due after one year through five years		144,282		144,933		-		-
Due after five years through ten years		82,454		82,996		705		799
Due after ten years		15,609		15,622		3,023		3,124
Mortgage-backed securities		366,244		373,001		-		-
Total	$	616,540	$	624,522	$	3,728	$	3,923

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

(In thousands)	2014			2013			2012
Gross realized gains	$	190		$	14		$	1,349
Gross realized losses		253			64			140
Net realized (loss) gain	$	(63	)	$	(50	)	$	1,209
Income tax (benefit) provision related to net realized (loss) gain	$	(22	)	$	(18	)	$	423

Schedule of Unrealized Loss on Investments [Table Text Block]

	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

	Less than 12 Months				12 Months or More				Total
December 31, 2013 (In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. government-sponsored entities	$	65,094	$	2,434	$	11,830	$	721	$	76,924	$	3,155
Obligations of states and political subdivisions		48,715		1,594		15,095		803		63,810		2,397
Mortgage-backed securities – residential		219,032		5,199		16,306		1,033		235,338		6,232
Mortgage-backed securities – commercial		689		59		-		-		689		59
Corporate debt securities		80		-		4,816		1,049		4,896		1,049
Mutual funds and equity securities		716		17		22		3		738		20
Total	$	334,326	$	9,303	$	48,069	$	3,609	$	382,395	$	12,912