Note 4 - Investment Securities (Tables)

3 Months Ended

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Summary of Investment Holdings, Schedule of Investments [Table Text Block]

	March 31, 2015
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
Securities available for sale:	Cost		Gains		Losses		Value
	(In thousands)
Government agencies	$	30,896	$	763	$	-	$	31,659
Mortgage-backed securities		151,504		4,626		41		156,089
Municipal securities		53,879		2,063		21		55,921
Corporate bonds		28,881		54		121		28,814
Total	$	265,160	$	7,506	$	183	$	272,483

	December 31, 2014
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
Securities available for sale:	Cost		Gains		Losses		Value
	(In thousands)
Government agencies	$	30,911	$	397	$	76	$	31,232
Mortgage-backed securities		170,443		4,384		547		174,280
Municipal securities		54,014		1,797		109		55,702
Corporate bonds		31,411		36		362		31,085
Total	$	286,779	$	6,614	$	1,094	$	292,299

	March 31, 2015
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
Securities held to maturity:	Cost		Gains		Losses		Value
	(In thousands)
Government agencies	$	508	$	6	$	-	$	514

	December 31, 2014
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
Securities held to maturity:	Cost		Gains		Losses		Value
	(In thousands)
Government agencies	$	507	$	5	$	-	$	512

Schedule of Unrealized Loss on Investments [Table Text Block]

	March 31, 2015
	Less Than 12 Months				12 Months or More				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(In thousands)
Mortgage-backed securities	$	17,427	$	20	$	2,975	$	21	$	20,402	$	41
Municipal securities		4,253		21		-		-		4,253		21
Corporate bonds		11,307		29		5,908		92		17,215		121
Total	$	32,987	$	70	$	8,883	$	113	$	41,870	$	183

	December 31, 2014
	Less Than 12 Months				12 Months or More				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(In thousands)
Government agencies	$	11,790	$	76	$	-	$	-	$	11,790	$	76
Mortgage-backed securities		61,106		527		3,093		20		64,109		547
Municipal securities		5,469		99		904		10		6,373		109
Corporate bonds		21,670		256		3,894		106		25,564		362
Total	$	100,035	$	958	$	7,891	$	136	$	107,926	$	1,094

Investments Classified by Contractual Maturity Date [Table Text Block]

	Less Than One Year		One to Five Years		Five to Ten Years		Over Ten Years
Securities available for sale:	(In thousands)
Government agencies
Amortized cost	$	-	$	7,614	$	23,282	$	-
Fair value		-		7,710		23,949		-
Mortgage-backed securities
Amortized cost		-		75,592		53,959		21,953
Fair value		-		77,428		55,009		23,652
Municipal securities
Amortized cost		1,945		24,240		23,969		3,725
Fair value		1,965		24,947		25,142		3,867
Corporate bonds
Amortized cost		-		15,383		13,498		-
Fair value		-		15,385		13,429		-
Total Amortized cost	$	1,945	$	122,829	$	114,708	$	25,678
Total Fair value	$	1,965	$	125,470	$	117,529	$	27,519

	Less Than One Year		One to Five Years		Five to Ten Years		Over Ten Years
Securities held to maturity:	(In thousands)
Government agencies
Amortized cost	$	-	$	508	$	-	$	-
Fair value		-		514		-		-
Total Amortized cost	$	-	$	508	$	-	$	-
Total Fair value	$	-	$	514	$	-	$	-

Marketable Securities [Table Text Block]

	Amortized Cost		Fair Value
Obligations of state and political subdivisions:	(dollars in thousands)
General obligation bonds:
Texas	$	11,252	$	11,880
Pennsylvania		6,492		6,597
California		3,563		3,640
North Carolina		2,993		3,061
New York		2,579		2,669
South Carolina		2,295		2,371
Other (9 states)		10,742		11,124
Total general obligation bonds		39,916		41,342
Revenue bonds:
North Carolina		4,964		5,220
New York		2,796		2,865
Texas		2,766		2,854
Pennsylvania		1,774		1,871
Florida		1,663		1,768
Total revenue bonds		13,963		14,578
Total obligations of state and political subdivisions	$	53,879	$	55,920

	March 31, 2015
	Amortized Cost		Fair Value
Revenue bonds by revenue source:		(dollars in thousands)
Refunding bonds	$	4,483	$	4,738
University and college		2,766		2,854
Public improvements		2,177		2,266
Pension funding		1,774		1,871
Other		2,763		2,849
Total revenue bonds	$	13,963	$	14,578