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Note 7 - Loans And Related Allowance For Loan Losses (Detail) - Troubled Debt Restructurings That Subsequently Defaulted (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Commercial and Industrial [Member]
   
Number of Contracts 6 2
Recorded Investment (in Dollars) $ 248 $ 90
Residential Real Estate Mortgage [Member]
   
Number of Contracts 1  
Recorded Investment (in Dollars) 68  
Consumer Installment [Member]
   
Number of Contracts 1 2
Recorded Investment (in Dollars) $ 5 $ 28