Note 5 - Securities (Tables)

9 Months Ended

Sep. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities [Table Text Block]

	September 30, 2015
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Available for Sale:
U.S. Government agencies and corporations	$	190,723	$	757	$	4,557	$	186,923
States and political subdivisions		16,348		601		---		16,949
Mortgage-backed securities		1,355		137		---		1,492
Corporate debt securities		6,015		17		300		5,732
Other securities		189		---		53		136
Total securities available for sale	$	214,630	$	1,512	$	4,910	$	211,232

	December 31, 2014
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Available for Sale:
U.S. Government agencies and corporations	$	197,740	$	973	$	4,494	$	194,219
States and political subdivisions		18,529		851		---		19,380
Mortgage-backed securities		1,830		184		---		2,014
Corporate debt securities		6,991		140		27		7,104
Other securities		189		---		62		127
Total securities available for sale	$	225,279	$	2,148	$	4,583	$	222,844

Investments Classified by Contractual Maturity Date [Table Text Block]

	September 30, 2015
	Amortized Cost		Fair Value
Available for Sale:
Due in one year or less	$	338	$	339
Due after one year through five years		37,130		37,470
Due after give years through ten years		27,571		27,537
Due after ten years		149,402		145,750
No maturity		189		136
Total securities available for sale	$	214,630	$	211,232

	September 30, 2015
	Amortized Cost		Fair Value
Held to maturity:
Due in one year or less	$	901	$	909
Due after one year through five years		12,890		13,781
Due after give years through ten years		20,165		21,185
Due after ten years		120,688		123,568
Total securities held to maturity	$	154,644	$	159,443

Held-to-maturity Securities [Table Text Block]

	September 30, 2015
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Held to Maturity:
U.S. Government agencies and corporations	$	14,912	$	343	$	216	$	15,039
States and political subdivisions		137,969		5,635		1,020		142,584
Mortgage-backed securities		346		40		---		386
Corporate debt securities		1,417		18		1		1,434
Total securities held to maturity	$	154,644	$	6,036	$	1,237	$	159,443

	December 31, 2014
	Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Fair Values
Held to Maturity:
U.S. Government agencies and corporations	$	18,922	$	350	$	245	$	19,027
States and political subdivisions		140,702		6,823		727		146,798
Mortgage-backed securities		415		51		---		466
Corporate debt securities		1,413		1		2		1,412
Total securities held to maturity	$	161,452	$	7,225	$	974	$	167,703

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

	September 30, 2015
	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	$	62,563	$	1,358	$	89,871	$	3,415
States and political subdivisions		19,803		415		9,774		605
Corporate debt securities		4,968		300		200		1
Other securities		---		---		136		53
Total	$	87,334	$	2,073	$	99,981	$	4,074

	December 31, 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	$	6,964	$	30	$	156,149	$	4,709
States and political subdivisions		1,222		35		19,818		692
Corporate debt securities		450		2		1,948		27
Other securities		---		---		127		62
Total	$	8,636	$	67	$	178,042	$	5,490