Note 6 - Investment Securities (Tables)

9 Months Ended

Sep. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Schedule of AFS and HTM Reconciliation [Table Text Block]

September 30, 2015 (In thousands)	Amortized Cost		Gross UnrealizedGains		Gross UnrealizedLosses		Estimated Fair Value
Available For Sale
Obligations of U.S. government-sponsored entities	$	126,197	$	642	$	155	$	126,684
Obligations of states and political subdivisions		143,502		2,648		240		145,910
Mortgage-backed securities – residential		306,466		7,254		460		313,260
Mortgage-backed securities – commercial		15,870		205		1		16,074
Corporate debt securities		6,879		16		865		6,030
Mutual funds and equity securities		618		-		66		552
Total securities – available for sale	$	599,532	$	10,765	$	1,787	$	608,510
Held To Maturity
Obligations of states and political subdivisions	$	3,689	$	204	$	-	$	3,893

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
September 30, 2015 (In thousands)	Cost		Fair Value		Cost		Fair Value
Due in one year or less	$	12,156	$	12,183	$	-	$	-
Due after one year through five years		167,082		168,576		-		-
Due after five years through ten years		80,840		82,061		705		800
Due after ten years		16,500		15,804		2,984		3,093
Mortgage-backed securities		322,336		329,334		-		-
Total	$	598,914	$	607,958	$	3,689	$	3,893

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

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
(In thousands)	2015			2014		2015		2014
Gross realized gains	$	5		$	8	$	185	$	186
Gross realized losses		7			-		22		253
Net realized (loss) gain	$	(2	)	$	8	$	163	$	(67	)

Schedule of Unrealized Loss on Investments [Table Text Block]

	Less than 12 Months				12 Months or More				Total
September 30, 2015 (In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. government-sponsored entities	$	10,201	$	71	$	17,468	$	84	$	27,669	$	155
Obligations of states and political subdivisions		27,192		159		8,714		81		35,906		240
Mortgage-backed securities – residential		26,332		74		22,958		386		49,290		460
Mortgage-backed securities – commercial		3,167		1		-		-		3,167		1
Corporate debt securities		304		11		5,038		854		5,342		865
Mutual funds and equity securities		489		45		63		21		552		66
Total	$	67,685	$	361	$	54,241	$	1,426	$	121,926	$	1,787

	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