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Note 3 - Impaired Loans (Additional Information) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Commercial Portfolio Segment [Member] |  |  |  |
With no allowance recorded, average recorded investment | $ 116 |  |  | $ 1
With no allowance recorded, interest income recognized |  |  |  |
With allowance recorded, average recorded investment | 2,977 |  | $ 1,914 |
With allowance recorded, interest income recognized |  |  |  |
Average recorded investment | 3,093 |  | 2,062 | 1
Interest income recognized |  |  |  |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
With no allowance recorded, average recorded investment | 7,524 | 8,025 | 7,597 | 8,160
With no allowance recorded, interest income recognized | 79 | 94 | 159 | 188
With allowance recorded, average recorded investment |  |  |  |
With allowance recorded, interest income recognized |  |  |  |
Average recorded investment | 7,524 | 8,025 | 7,597 | 8,160
Interest income recognized | 79 | 94 | 159 | 188
Residential Portfolio Segment [Member] |  |  |  |
With no allowance recorded, average recorded investment | 4,525 | 3,392 | 4,535 | 3,459
With no allowance recorded, interest income recognized | 31 | 32 | 62 | 63
With allowance recorded, average recorded investment |  |  |  |
With allowance recorded, interest income recognized |  |  |  |
Average recorded investment | 4,525 | 3,392 | 4,535 | 3,459
Interest income recognized | 31 | 32 | 62 | 63
Consumer Portfolio Segment [Member] |  |  |  |
With no allowance recorded, average recorded investment | 545 | 551 | 546 | 552
With no allowance recorded, interest income recognized | 5 | 5 | 9 | 9
With allowance recorded, average recorded investment | 2 |  | 2 | 1
With allowance recorded, interest income recognized |  |  |  |
Average recorded investment | 547 | 551 | 548 | 553
Interest income recognized | 5 | 5 | 9 | 9
With no allowance recorded, average recorded investment | 12,710 | 11,968 | 12,826 | 12,172
With no allowance recorded, interest income recognized | 115 | 131 | 230 | 260
With allowance recorded, average recorded investment | 2,979 |  | 1,916 | 1
With allowance recorded, interest income recognized |  |  |  |
Average recorded investment | 15,688 | 11,968 | 14,742 | 12,173
Interest income recognized | $ 115 | $ 131 | $ 230 | $ 260

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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5258-111524 + Details
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- Definition Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 + Details
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