Note 3 - Securities (Tables)

6 Months Ended

Jun. 30, 2014

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities [Table Text Block]

	June 30, 2014
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
U.S. government agencies and corporations	$	29,723	$	27	$	(848	)	$	28,902
Mortgage-backed securities		57,411		585		(244	)		57,752
Obligations of states and political subdivisions		124,660		6,296		(302	)		130,654
	$	211,794	$	6,908	$	(1,394	)	$	217,308

	December 31, 2013
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
U.S. Treasury securities	$	10,000	$	—	$	—		$	10,000
U.S. government agencies and corporations		32,503		4		(2,557	)		29,950
Mortgage-backed securities		51,318		100		(555	)		50,863
Obligations of states and political subdivisions		123,729		4,223		(813	)		127,139
Corporate and other debt securities		158		—		—			158
	$	217,708	$	4,327	$	(3,925	)	$	218,110

Investments Classified by Contractual Maturity Date [Table Text Block]

	June 30, 2014
(Dollars in thousands)	Amortized Cost		Estimated Fair Value
Due in one year or less	$	28,062	$	27,899
Due after one year through five years		90,906		93,851
Due after five years through ten years		63,093		64,459
Due after ten years		29,733		31,099
	$	211,794	$	217,308

Schedule of Unrealized Loss on Investments [Table Text Block]

	Less Than 12 Months				12 Months or More				Total
(Dollars in thousands)	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. government agencies and corporations	$	7,370	$	87	$	21,147	$	761	$	28,517	$	848
Mortgage backed securities		8,330		177		1,442		67		9,772		244
Obligations of states and political subdivisions		5,765		83		10,448		219		16,213		302
Total temporarily impaired securities	$	21,465	$	347	$	33,037	$	1,047	$	54,502	$	1,394

	Less Than 12 Months				12 Months or More				Total
(Dollars in thousands)	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. government agencies and corporations	$	29,430	$	1,385	$	8,948	$	1,172	$	38,378	$	2,557
Mortgage-backed securities		40,090		555		—		—		40,090		555
Obligations of states and political subdivisions		21,260		656		3,078		157		24,338		813
Total temporarily impaired securities	$	90,780	$	2,596	$	12,026	$	1,329	$	102,806	$	3,925