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Note 4 - Loans (Detail) - Loans Held for Sale (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2012
Type of Loan - Amount (in Dollars) $ 244,064 $ 243,741 $ 220,096
Loans Held For Sale [Member] | Commercial and Industrial Loans [Member]
     
Type of Loan - Amount (in Dollars) 239 346 721
Type of Loan - % of Total Loans 0.10% 0.10% 0.30%
Loans Held For Sale [Member] | Real Estate Loans [Member]
     
Type of Loan - Amount (in Dollars) 1,187 1,202 1,974
Type of Loan - % of Total Loans 0.50% 0.50% 0.90%
Loans Held For Sale [Member]
     
Type of Loan - Amount (in Dollars) $ 1,426 $ 1,548 $ 5,874
Type of Loan - % of Total Loans 0.60% 0.60% 2.60%