Note 6 - Investment Securities (Tables)

3 Months Ended

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Schedule of AFS and HTM Reconciliation [Table Text Block]

March 31, 2015 (In thousands)	Amortized Cost		Gross UnrealizedGains		Gross UnrealizedLosses		Estimated Fair Value
Available For Sale
Obligations of U.S. government-sponsored entities	$	135,491	$	539	$	367	$	135,663
Obligations of states and political subdivisions		139,835		2,944		282		142,497
Mortgage-backed securities – residential		343,541		8,993		620		351,914
Mortgage-backed securities – commercial		11,669		138		-		11,807
Corporate debt securities		6,881		26		526		6,381
Mutual funds and equity securities		849		4		77		776
Total securities – available for sale	$	638,266	$	12,644	$	1,872	$	649,038
Held To Maturity
Obligations of states and political subdivisions	$	3,715	$	190	$	-	$	3,905

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
March 31, 2015 (In thousands)	Cost		Fair Value		Cost		Fair Value
Due in one year or less	$	13,764	$	13,797	$	-	$	-
Due after one year through five years		154,900		156,299		-		-
Due after five years through ten years		98,195		99,409		705		787
Due after ten years		15,348		15,036		3,010		3,118
Mortgage-backed securities		355,210		363,721		-		-
Total	$	637,417	$	648,262	$	3,715	$	3,905

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

	Three Months Ended
	March 31,
(In thousands)	2015		2014
Gross realized gains	$	130	$	159
Gross realized losses		10		150
Net realized gain	$	120	$	9

Schedule of Unrealized Loss on Investments [Table Text Block]

	Less than 12 Months				12 Months or More				Total
March 31, 2015 (In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. government-sponsored entities	$	50,220	$	184	$	19,720	$	183	$	69,940	$	367
Obligations of states and political subdivisions		25,634		175		8,103		107		33,737		282
Mortgage-backed securities – residential		39,182		160		23,363		460		62,545		620
Corporate debt securities		133		3		5,363		523		5,496		526
Mutual funds and equity securities		423		65		70		12		493		77
Total	$	115,592	$	587	$	56,619	$	1,285	$	172,211	$	1,872

	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