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Note 3 - Investment Securities (Tables) | 9 Months Ended
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Sep. 30, 2016
Notes Tables |
Marketable Securities [Table Text Block] |
(In thousands) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
September 30, 2016 |  |  |  |  |  |  |  |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  | $ | 98,359 |  |  | $ | 728 |  |  | $ | 35 |  |  | $ | 99,052 |
Agency CMO |  |  | 17,195 |  |  |  | 89 |  |  |  | 59 |  |  |  | 17,225 |
Other debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency notes and bonds |  |  | 72,399 |  |  |  | 117 |  |  |  | 55 |  |  |  | 72,461 |
Municipal obligations |  |  | 56,576 |  |  |  | 1,943 |  |  |  | 110 |  |  |  | 58,409 |
Subtotal - debt securities |  |  | 244,529 |  |  |  | 2,877 |  |  |  | 259 |  |  |  | 247,147 |
Mutual funds |  |  | 103 |  |  |  | 0 |  |  |  | 0 |  |  |  | 103 |
Total securities available for sale |  | $ | 244,632 |  |  | $ | 2,877 |  |  | $ | 259 |  |  | $ | 247,250 |
Securities held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  | $ | 3 |  |  | $ | 0 |  |  | $ | 0 |  |  | $ | 3 |
Total securities held to maturity |  | $ | 3 |  |  | $ | 0 |  |  | $ | 0 |  |  | $ | 3 |
December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  | $ | 42,158 |  |  | $ | 123 |  |  | $ | 271 |  |  | $ | 42,010 |
Agency CMO |  |  | 9,391 |  |  |  | 41 |  |  |  | 101 |  |  |  | 9,331 |
Other debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency notes and bonds |  |  | 84,797 |  |  |  | 11 |  |  |  | 355 |  |  |  | 84,453 |
Municipal obligations |  |  | 49,527 |  |  |  | 1,372 |  |  |  | 60 |  |  |  | 50,839 |
Subtotal - debt securities |  |  | 185,873 |  |  |  | 1,547 |  |  |  | 787 |  |  |  | 186,633 |
Mutual funds |  |  | 118 |  |  |  | 0 |  |  |  | 0 |  |  |  | 118 |
Total securities available for sale |  | $ | 185,991 |  |  | $ | 1,547 |  |  | $ | 787 |  |  | $ | 186,751 |
Securities held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  | $ | 4 |  |  | $ | 0 |  |  | $ | 0 |  |  | $ | 4 |
Total securities held to maturity |  | $ | 4 |  |  | $ | 0 |  |  | $ | 0 |  |  | $ | 4 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Securities Available for Sale |  | Securities Held to Maturity
|  | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
(In thousands) |  |  |  |  |  |  |  |
Due in one year or less |  | $ | 2,543 |  |  | $ | 2,550 |  |  | $ | 0 |  |  | $ | 0 |
Due after one year through five years |  |  | 76,637 |  |  |  | 76,854 |  |  |  | 0 |  |  |  | 0 |
Due after five years through ten years |  |  | 17,579 |  |  |  | 17,855 |  |  |  |  |  |  |  |  |
Due after ten years |  |  | 32,216 |  |  |  | 33,611 |  |  |  | 0 |  |  |  | 0 |
|  |  | 128,975 |  |  |  | 130,870 |  |  |  | 0 |  |  |  | 0 |
Mortgage-backed securities and CMO |  |  | 115,554 |  |  |  | 116,277 |  |  |  | 3 |  |  |  | 3 |
|  | $ | 244,529 |  |  | $ | 247,147 |  |  | $ | 3 |  |  | $ | 3 |
Schedule of Unrealized Loss on Investments [Table Text Block] |
|  | Number of Investment Positions |  | Fair Value |  | Gross Unrealized Losses
(Dollars in thousands) |  |  |  |  |  |
Continuous loss position less than twelve months: |  |  |  |  |  |  |  |  |  |  |  |
Agency notes and bonds |  |  | 8 |  |  | $ | 29,198 |  |  | $ | 55 |
Agency CMO |  |  | 5 |  |  |  | 5,080 |  |  |  | 43 |
Agency mortgage-backed securities |  |  | 10 |  |  |  | 21,381 |  |  |  | 34 |
Municipal obligations |  |  | 19 |  |  |  | 10,602 |  |  |  | 110 |
Total less than twelve months |  |  | 42 |  |  |  | 66,261 |  |  |  | 242 |
Continuous loss position more than twelve months: |  |  |  |  |  |  |  |  |  |  |  |
Agency CMO |  |  | 5 |  |  |  | 2,744 |  |  |  | 16 |
Agency mortgage-backed securities |  |  | 1 |  |  |  | 571 |  |  |  | 1 |
Total more than twelve months |  |  | 6 |  |  |  | 3,315 |  |  |  | 17 |
Total securities available for sale |  |  | 48 |  |  | $ | 69,576 |  |  | $ | 259 |

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