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Note 4 - Loans and Allowance for Loan Losses - Loans Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Average impaired loans | $ 17,708 |  | $ 17,549 |  |
Interest income recognized | 181 |  | 631 |  |
Cash basis interest recognized | 181 |  | 631 |  |
Unpaid principal balance | 20,503 |  | 20,503 |  | $ 25,176
Recorded investment | 17,689 |  | 17,689 |  | 22,709
Allowance for Loan Losses Allocated | 98 |  | 98 |  | 2,981
Average impaired loans - with no allowance recorded |  | $ 20,013 |  | $ 18,995 |
Interest income recognized - with no allowance recorded |  | 418 |  | 586 |
Cash basis interest recognized - with no allowance recorded |  | 418 |  | 586 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Nonowner Occupied [Member] |  |  |  |  |
Interest income recognized - with allowance recorded | 5 | 5 | 14 | 10 |
Cash basis interest recognized - with allowance recorded | 5 | 5 | 14 | 10 |
Unpaid principal balance - with allowance recorded | 377 |  | 377 |  | 384
Recorded investment - with allowance recorded | 377 |  | 377 |  | 384
Unpaid principal balance - with no allowance recorded | 5,229 |  | 5,229 |  | 5,078
Recorded investment - with no allowance recorded | 3,773 |  | 3,773 |  | 3,632
Allowance for Loan Losses Allocated | 97 |  | 97 |  | 100
Average impaired loans - with no allowance recorded | 3,779 | 3,378 | 3,730 | 3,176 |
Interest income recognized - with no allowance recorded | 21 | 29 | 74 | 42 |
Cash basis interest recognized - with no allowance recorded | 21 | 29 | 74 | 42 |
Average impaired loans - with allowance recorded | 379 | 392 | 380 | 393 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Owner Occupied [Member] |  |  |  |  |
Interest income recognized - with allowance recorded |  | 143 |  | 147 |
Cash basis interest recognized - with allowance recorded |  | 143 |  | 147 |
Unpaid principal balance - with allowance recorded |  |  |  |  | 5,477
Recorded investment - with allowance recorded |  |  |  |  | 5,477
Unpaid principal balance - with no allowance recorded | 3,164 |  | 3,164 |  | 3,638
Recorded investment - with no allowance recorded | 2,665 |  | 2,665 |  | 3,091
Allowance for Loan Losses Allocated |  |  |  |  | 2,435
Average impaired loans - with no allowance recorded | 2,836 | 3,197 | 2,921 | 3,220 |
Interest income recognized - with no allowance recorded | 36 | 40 | 120 | 83 |
Cash basis interest recognized - with no allowance recorded | 36 | 40 | 120 | 83 |
Average impaired loans - with allowance recorded |  | 2,570 |  | 1,781 |
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Interest income recognized - with allowance recorded | 5 |  | 108 |  |
Cash basis interest recognized - with allowance recorded | 5 |  | 108 |  |
Unpaid principal balance - with no allowance recorded | 993 |  | 993 |  | 1,001
Recorded investment - with no allowance recorded | 447 |  | 447 |  | 527
Average impaired loans - with no allowance recorded |  | 431 |  | 514 |
Interest income recognized - with no allowance recorded |  | 97 |  | 97 |
Cash basis interest recognized - with no allowance recorded |  | 97 |  | 97 |
Average impaired loans - with allowance recorded | 487 |  | 501 |  |
Consumer Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |
Interest income recognized - with allowance recorded | 2 | 2 | 5 | 4 |
Cash basis interest recognized - with allowance recorded | 2 | 2 | 5 | 4 |
Unpaid principal balance - with allowance recorded | 209 |  | 209 |  | 416
Recorded investment - with allowance recorded | 209 |  | 209 |  | 416
Allowance for Loan Losses Allocated | 1 |  | 1 |  | 205
Average impaired loans - with allowance recorded | 209 | 218 | 210 | 218 |
Residential Portfolio Segment [Member] |  |  |  |  |
Unpaid principal balance - with no allowance recorded | 1,141 |  | 1,141 |  | 717
Recorded investment - with no allowance recorded | 1,141 |  | 1,141 |  | 717
Average impaired loans - with no allowance recorded | 1,028 | 728 | 992 | 730 |
Interest income recognized - with no allowance recorded | 12 | 7 | 20 | 16 |
Cash basis interest recognized - with no allowance recorded | 12 | 7 | 20 | 16 |
Commercial and Industrial Portfolio Segment [Member] |  |  |  |  |
Interest income recognized - with allowance recorded | 100 |  | 290 |  |
Cash basis interest recognized - with allowance recorded | 100 |  | 290 |  |
Unpaid principal balance - with allowance recorded |  |  |  |  | 392
Recorded investment - with allowance recorded |  |  |  |  | 392
Unpaid principal balance - with no allowance recorded | 9,390 |  | 9,390 |  | 8,073
Recorded investment - with no allowance recorded | 9,077 |  | 9,077 |  | 8,073
Allowance for Loan Losses Allocated |  |  |  |  | $ 241
Average impaired loans - with no allowance recorded |  | 8,212 |  | 8,076 |
Interest income recognized - with no allowance recorded |  | 95 |  | 187 |
Cash basis interest recognized - with no allowance recorded |  | 95 |  | 187 |
Average impaired loans - with allowance recorded | $ 8,990 | $ 887 | $ 8,815 | $ 887 |

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