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Note 3 - Loans and Allowance for Loan Losses (Detail) - Risk Category of Loans by Class-Consumer (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Loans $ 1,004,995 $ 1,072,108
Consumer Secured [Member] | Performing Financing Receivable [Member]
   
Loans 11,723 14,134
Consumer Secured [Member] | Nonperforming Financing Receivable [Member]
   
Loans 9 80
Consumer Secured [Member] | Total [Member]
   
Loans 11,732 14,214
Consumer Secured [Member]
   
Loans 11,732 14,214
Consumer Unsecured [Member] | Performing Financing Receivable [Member]
   
Loans 6,382 7,138
Consumer Unsecured [Member] | Nonperforming Financing Receivable [Member]
   
Loans 133 13
Consumer Unsecured [Member] | Total [Member]
   
Loans 6,515 7,151
Consumer Unsecured [Member]
   
Loans $ 6,515 $ 7,151