Note 2 - Investment Securities (Details) - Gross Unrealized Losses and Fair Value of Securities in a Continuous Unrealized Loss Position (USD $)	Jun. 30, 2014	Dec. 31, 2013
Securities available for sale:
Available for Sale Securities less than 12 months fair value	$ 301,061,298	$ 441,808,604
Available for Sale Securities less than 12 months gross unrealized losses	(8,728,921)	(22,813,786)
Available for Sale Securities 12 months or more fair value	71,709,707	26,081,796
Available for Sale Securities 12 months or more gross unrealized losses	(1,284,182)	(1,941,536)
Available for Sale Securities fair value	372,771,005	467,890,400
Available for Sale Securities gross unrealized losses	(10,013,103)	(24,755,322)
US States and Political Subdivisions Debt Securities [Member]
Securities held to maturity:
Held to Maturity Securities less than 12 months fair value	37,351,435	101,983,602
Held to Maturity Securities less than 12 months gross unrealized losses	(982,726)	(6,711,240)
Held to Maturity Securities 12 months or more fair value	47,726,709	2,697,375
Held to Maturity Securities 12 months or more gross unrealized losses	(1,626,902)	(400,339)
Held to Maturity Securities fair value	85,078,144	104,680,977
Held to Maturity Securities gross unrealized losses	(2,609,628)	(7,111,579)
Securities available for sale:
Available for Sale Securities less than 12 months fair value	8,765,260	13,890,692
Available for Sale Securities less than 12 months gross unrealized losses	(131,548)	(724,939)
Available for Sale Securities 12 months or more fair value	2,184,122	985,687
Available for Sale Securities 12 months or more gross unrealized losses	(38,456)	(53,385)
Available for Sale Securities fair value	10,949,382	14,876,379
Available for Sale Securities gross unrealized losses	(170,004)	(778,324)
US Government Agencies Debt Securities [Member]
Securities available for sale:
Available for Sale Securities less than 12 months fair value	284,171,721	333,194,820
Available for Sale Securities less than 12 months gross unrealized losses	(8,502,103)	(19,141,077)
Available for Sale Securities 12 months or more fair value	13,725,024	10,978,390
Available for Sale Securities 12 months or more gross unrealized losses	(70,838)	(1,001,764)
Available for Sale Securities fair value	297,896,745	344,173,210
Available for Sale Securities gross unrealized losses	(8,572,941)	(20,142,841)
Residential Mortgage Backed Securities [Member]
Securities available for sale:
Available for Sale Securities less than 12 months fair value	8,124,317	94,723,092
Available for Sale Securities less than 12 months gross unrealized losses	(95,270)	(2,947,770)
Available for Sale Securities 12 months or more fair value	55,800,561	14,117,719
Available for Sale Securities 12 months or more gross unrealized losses	(1,174,888)	(886,387)
Available for Sale Securities fair value	63,924,878	108,840,811
Available for Sale Securities gross unrealized losses	$ (1,270,158)	$ (3,834,157)

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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 7

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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position.

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This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months.

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Amount of accumulated unrealized loss on investments in debt securities classified as held-to-maturity that have been in a continuous loss position for twelve months or longer.

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