Note 2 - Investment Securities (Details) - Gross Unrealized Losses and Fair Value of Securities in a Continuous Unrealized Loss Position (USD $)	Sep. 30, 2014	Dec. 31, 2013
Securities available for sale:
Available for Sale Securities less than 12 months fair value	$ 43,780,765	$ 441,808,604
Available for Sale Securities less than 12 months gross unrealized losses	(234,307)	(22,813,786)
Available for Sale Securities 12 months or more fair value	326,398,278	26,081,796
Available for Sale Securities 12 months or more gross unrealized losses	(10,326,209)	(1,941,536)
Available for Sale Securities fair value	370,179,043	467,890,400
Available for Sale Securities gross unrealized losses	(10,560,516)	(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	29,794,026	101,983,602
Held to Maturity Securities less than 12 months gross unrealized losses	(633,024)	(6,711,240)
Held to Maturity Securities 12 months or more fair value	43,172,941	2,697,375
Held to Maturity Securities 12 months or more gross unrealized losses	(1,132,402)	(400,339)
Held to Maturity Securities fair value	72,966,967	104,680,977
Held to Maturity Securities gross unrealized losses	(1,765,426)	(7,111,579)
Securities available for sale:
Available for Sale Securities less than 12 months fair value	1,446,532	13,890,692
Available for Sale Securities less than 12 months gross unrealized losses	(3,113)	(724,939)
Available for Sale Securities 12 months or more fair value	5,616,381	985,687
Available for Sale Securities 12 months or more gross unrealized losses	(96,352)	(53,385)
Available for Sale Securities fair value	7,062,913	14,876,379
Available for Sale Securities gross unrealized losses	(99,465)	(778,324)
US Government Agencies Debt Securities [Member]
Securities available for sale:
Available for Sale Securities less than 12 months fair value	32,208,945	333,194,820
Available for Sale Securities less than 12 months gross unrealized losses	(156,930)	(19,141,077)
Available for Sale Securities 12 months or more fair value	262,773,625	10,978,390
Available for Sale Securities 12 months or more gross unrealized losses	(8,889,312)	(1,001,764)
Available for Sale Securities fair value	294,982,570	344,173,210
Available for Sale Securities gross unrealized losses	(9,046,242)	(20,142,841)
Residential Mortgage Backed Securities [Member]
Securities available for sale:
Available for Sale Securities less than 12 months fair value	10,125,288	94,723,092
Available for Sale Securities less than 12 months gross unrealized losses	(74,264)	(2,947,770)
Available for Sale Securities 12 months or more fair value	58,008,272	14,117,719
Available for Sale Securities 12 months or more gross unrealized losses	(1,340,545)	(886,387)
Available for Sale Securities fair value	68,133,560	108,840,811
Available for Sale Securities gross unrealized losses	$ (1,414,809)	$ (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

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-SubTopic 10

-Section 50

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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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