Note 5 - Securities (Tables)

6 Months Ended

Jun. 30, 2014

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities [Table Text Block]

	June 30, 2014
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Available for Sale:
U.S. Government agencies and corporations	$	174,800	$	301	$	13,215	$	161,886
States and political subdivisions		21,428		912		5		22,335
Mortgage-backed securities		2,188		212		---		2,400
Corporate debt securities		8,801		66		198		8,669
Other securities		189		---		72		117
Total	$	207,406	$	1,491	$	13,490	$	195,407

	December 31, 2013
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Available for Sale:
U.S. Government agencies and corporations	$	169,818	$	199	$	22,163	$	147,854
States and political subdivisions		22,830		746		120		23,456
Mortgage-backed securities		2,627		213		---		2,840
Corporate debt securities		7,804		97		506		7,395
Other securities		189		---		22		167
Total securities available for sale	$	203,268	$	1,255	$	22,811	$	181,712

Held-to-maturity Securities [Table Text Block]

	June 30, 2014
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Held to Maturity:
U.S. Government agencies and corporations	$	17,935	$	321	$	834	$	17,422
States and political subdivisions		143,150		5,705		2,020		146,835
Mortgage-backed securities		461		56		---		517
Corporate debt securities		1,410		1		3		1,408
Total	$	162,956	$	6,083	$	2,857	$	166,182

	December 31, 2013
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Held to Maturity:
U.S. Government agencies and corporations	$	13,973	$	280	$	1,448	$	12,805
States and political subdivisions		149,490		2,971		6,502		145,959
Mortgage-backed securities		520		53		---		573
Total securities held to maturity	$	163,983	$	3,304	$	7,950	$	159,337

Schedule of Temporary Impairment Losses, Investments [Table Text Block]

	June 30, 2014
	Less Than 12 Months				12 Months or More
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Temporarily Impaired Securities:
U.S. Government agencies and corporations	$	4,996	$	13	$	161,705	$	14,036
States and political subdivisions		4,866		25		34,076		2,000
Corporate debt securities		2,424		19		3,845		182
Other securities		117		72		---		---
Total	$	12,403	$	129	$	199,626	$	16,218

	December 31, 2013
	Less Than 12 Months				12 Months or More
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Temporarily Impaired Securities:
U.S. Government agencies and corporations	$	138,324	$	20,400	$	15,796	$	3,211
States and political subdivisions		58,013		6,131		2,697		491
Corporate debt securities		5,511		506		---		---
Other securities		167		22		---		---
Total	$	202,015	$	27,059	$	18,493	$	3,702