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Note 14 - Income Taxes (Detail) - Components of Effective Tax Rate
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Statutory federal income tax rate 35.00% 35.00% 35.00%
Tax-exempt income, net of interest expense disallowance (21.30%) 27.00% 16.50%
State income tax, net of federal income tax effect (0.30%) 9.50% 12.10%
Other, net (2.40%) 3.20% 2.50%
Effective tax rate 11.00% 74.70% 66.10%