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Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Troubled Debt Restructurings Subsequently Defaulted
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2015
USD ($)
Jun. 30, 2014
Financing Receivable, Modifications [Line Items]      
Number of Contracts 0   0
Commercial and Industrial [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Contracts   1  
Recorded Investment   $ 48  
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Contracts   1  
Recorded Investment   $ 14