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Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Impaired Loans by Class - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
With no related allowance recorded:    
Recorded investment, with no related allowance $ 6,793 $ 10,119
Unpaid principal balance, with no related allowance 6,787 10,107
With an allowance recorded:    
Recorded investment, with related allowance 5,109 4,249
Unpaid principal balance, with related allowance 5,101 4,246
Related allowance 625 1,596
Total:    
Recorded investment 11,902 14,368
Unpaid principal balance 11,888 14,353
Related allowance 625 1,596
Residential Loan [Member]    
With no related allowance recorded:    
Recorded investment, with no related allowance   2,202
Unpaid principal balance, with no related allowance   2,197
Commercial Loans [Member]    
With no related allowance recorded:    
Recorded investment, with no related allowance   4,064
Unpaid principal balance, with no related allowance   4,060
With an allowance recorded:    
Recorded investment, with related allowance 2,204  
Unpaid principal balance, with related allowance 2,198  
Related allowance 86  
Total:    
Related allowance 86  
Commercial and Industrial [Member]    
With no related allowance recorded:    
Recorded investment, with no related allowance 675 1,146
Unpaid principal balance, with no related allowance 673 1,145
With an allowance recorded:    
Recorded investment, with related allowance 928 247
Unpaid principal balance, with related allowance 926 247
Related allowance 119 83
Total:    
Recorded investment 1,603 1,393
Unpaid principal balance 1,599 1,392
Related allowance 119 83
Real Estate Construction Porfolio Segment [Member]    
With no related allowance recorded:    
Recorded investment, with no related allowance 1,735 2,707
Unpaid principal balance, with no related allowance 1,734 2,705
With an allowance recorded:    
Recorded investment, with related allowance 152 589
Unpaid principal balance, with related allowance 152 589
Related allowance 153 589
Total:    
Recorded investment 1,887 3,296
Unpaid principal balance 1,886 3,294
Related allowance 153 589
Real Estate Construction Porfolio Segment [Member] | Residential Loan [Member]    
With an allowance recorded:    
Recorded investment, with related allowance 1,825  
Unpaid principal balance, with related allowance 1,825  
Related allowance 267  
Total:    
Related allowance 267  
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]    
With no related allowance recorded:    
Recorded investment, with no related allowance 2,100  
Unpaid principal balance, with no related allowance 2,098  
With an allowance recorded:    
Recorded investment, with related allowance   2,981
Unpaid principal balance, with related allowance   2,978
Related allowance 267 892
Total:    
Recorded investment 3,925 5,183
Unpaid principal balance 3,923 5,175
Related allowance 267 892
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]    
With no related allowance recorded:    
Recorded investment, with no related allowance 2,277  
Unpaid principal balance, with no related allowance 2,276  
With an allowance recorded:    
Recorded investment, with related allowance   426
Unpaid principal balance, with related allowance   426
Related allowance 86 30
Total:    
Recorded investment 4,481 4,490
Unpaid principal balance 4,474 4,486
Related allowance 86 30
Consumer Portfolio Segment [Member]    
With an allowance recorded:    
Recorded investment, with related allowance 6 6
Unpaid principal balance, with related allowance 6 6
Related allowance   2
Total:    
Recorded investment 6 6
Unpaid principal balance $ 6 6
Related allowance   $ 2