Note 2 - Securities (Tables)

3 Months Ended

Mar. 31, 2013

Available-for-sale Securities [Table Text Block]

	March 31, 2013
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
U.S. government agencies and corporations	$	26,035	$	5	$	(118	)	$	25,922
Mortgage-backed securities		1,899		56		—			1,955
Obligations of states and political subdivisions		114,231		8,336		(111	)		122,456
Preferred stock		27		161		—			188
	$	142,192	$	8,558	$	(229	)	$	150,521

	December 31, 2012
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
U.S. government agencies and corporations	$	24,628	$	24	$	(3	)	$	24,649
Mortgage-backed securities		2,127		62		—			2,189
Obligations of states and political subdivisions		116,879		9,069		(73	)		125,875
Preferred stock		27		77		—			104
	$	143,661	$	9,232	$	(76	)	$	152,817

Investments Classified by Contractual Maturity Date [Table Text Block]

	March 31, 2013
(Dollars in thousands)	Amortized Cost		Estimated Fair Value
Due in one year or less	$	31,036	$	31,272
Due after one year through five years		39,805		42,011
Due after five years through ten years		45,669		49,147
Due after ten years		25,655		27,903
Preferred stock		27		188
	$	142,192	$	150,521

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	$	17,033	$	118	$	—	$	—	$	17,033	$	118
Obligations of states and political subdivisions		5,228		106		787		5		6,015		111
Total temporarily impaired securities	$	22,261	$	224	$	787	$	5	$	23,048	$	229

	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	$	5,479	$	3	$	—	$	—	$	5,479	$	3
Obligations of states and political subdivisions		5,804		71		263		2		6,067		73
Total temporarily impaired securities	$	11,283	$	74	$	263	$	2	$	11,546	$	76