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Note 4 - Mortgage Banking Derivative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Note 4 - Mortgage Banking Derivative (Details) [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 53,000 | $ 30,700 | $ 53,000 | $ 30,700 |
Derivative Asset | 3,445 |  | 3,445 |  |
Derivative Liability | 245 |  | 245 |  | $ 250
Gain on Derivative Instruments, Pretax |  |  |  | 47 |
Other Assets [Member] |  |  |  |  |
Note 4 - Mortgage Banking Derivative (Details) [Line Items] |  |  |  |  |
Derivative Asset | 197 | 34 | 197 | 34 |
Other Liabilities [Member] |  |  |  |  |
Note 4 - Mortgage Banking Derivative (Details) [Line Items] |  |  |  |  |
Derivative Liability | 245 | 18 | 245 | 18 |
Other Noninterest Income [Member] |  |  |  |  |
Note 4 - Mortgage Banking Derivative (Details) [Line Items] |  |  |  |  |
Gain on Derivative Instruments, Pretax | 9 |  |  |  |
Loss on Derivative Instruments, Pretax |  | 194 | 63 |  |
Other Noninterest Income [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |
Note 4 - Mortgage Banking Derivative (Details) [Line Items] |  |  |  |  |
Gain on Derivative Instruments, Pretax |  | $ 140 |  |  |
Loss on Derivative Instruments, Pretax | $ 327 |  | $ 9 | $ 18 |

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