Note 2 - Investment Securities (Detail) - Amortized Cost and Fair Value of Securities by Contractual Maturity (USD $)	Jun. 30, 2012
Securities held to maturity:
Due in one year or less	$ 50,000
Due in one year or less	50,000
Due after one year through five years	100,000
Due after one year through five years	100,000
Due after five years	550,000
Due after five years	550,000
	700,000
	700,000
Securities available for sale:
Due in one year or less	2,554,433
Due in one year or less	2,569,961
Due after one year through five years	57,416,808
Due after one year through five years	57,848,858
Due after five years	407,186,819
Due after five years	410,354,841
Securities Available for Sale - amortized cost	630,893,475
Securities Available for Sale - fair value	638,137,836
Total [Member]
Securities available for sale:
Securities Available for Sale - amortized cost	467,158,060
Securities Available for Sale - fair value	470,773,660
Residential Mortgage Backed Securities [Member]
Securities available for sale:
Securities Available for Sale - amortized cost	162,415,855
Securities Available for Sale - fair value	165,827,201
Debt Securities [Member]
Securities available for sale:
Securities Available for Sale - amortized cost	1,319,560
Securities Available for Sale - fair value	$ 1,536,975

Available for sale securities debt maturities due after five years amortized cost.

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Available for sale securities debt maturities due after five years fair value.

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Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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Amount of available-for-sale debt securities at fair value that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the fair value over several maturity groupings.

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Amount of held-to-maturity debt securities at fair value maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year.

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Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, maturing in the next fiscal year through the fifth fiscal year following the latest fiscal year.

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