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Note 8 - Loans and Allowance for Loan Losses (Detail) - Risk Category of Loans by Class-Consumer (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Loans $ 1,017,977 $ 1,004,995
Consumer Secured [Member] | Performing Financing Receivable [Member]
   
Loans 10,823 11,723
Consumer Secured [Member] | Nonperforming Financing Receivable [Member]
   
Loans 29 9
Consumer Secured [Member] | Total [Member]
   
Loans 10,852 11,732
Consumer Secured [Member]
   
Loans 10,852 11,732
Consumer Unsecured [Member] | Performing Financing Receivable [Member]
   
Loans 6,154 6,382
Consumer Unsecured [Member] | Nonperforming Financing Receivable [Member]
   
Loans 39 133
Consumer Unsecured [Member] | Total [Member]
   
Loans 6,193 6,515
Consumer Unsecured [Member]
   
Loans $ 6,193 $ 6,515