Note 5 - Securities (Tables)

9 Months Ended

Sep. 30, 2014

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities [Table Text Block]

	September 30, 2014
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Available for Sale:
U.S. Government agencies and corporations	$	184,737	$	380	$	10,673	$	174,444
States and political subdivisions		19,657		894		6		20,545
Mortgage-backed securities		2,012		194		---		2,206
Corporate debt securities		7,801		66		175		7,692
Other securities		189		---		56		133
Total	$	214,396	$	1,534	$	10,910	$	205,020

	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]

	September 30, 2014
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Held to Maturity:
U.S. Government agencies and corporations	$	18,928	$	307	$	666	$	18,569
States and political subdivisions		141,683		6,465		1,206		146,942
Mortgage-backed securities		434		52		---		486
Corporate debt securities		1,412		2		2		1,412
Total	$	162,457	$	6,826	$	1,874	$	167,409

	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]

	September 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	$	16,798	$	79	$	161,479	$	11,260
States and political subdivisions		401		---		26,841		1,212
Corporate debt securities		450		2		3,853		175
Other securities		133		56		---		---
Total	$	17,782	$	137	$	192,173	$	12,647

	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