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Note 3 - Investment Securities (Tables) | 6 Months Ended
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Jun. 30, 2016
Notes Tables |
Marketable Securities [Table Text Block] |
(In thousands) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
June 30, 2016 |  |  |  |  |  |  |  |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  | $ | 86,056 |  |  | $ | 644 |  |  | $ | 35 |  |  | $ | 86,665 |
Agency CMO |  |  | 17,092 |  |  |  | 135 |  |  |  | 19 |  |  |  | 17,208 |
Other debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency notes and bonds |  |  | 86,846 |  |  |  | 192 |  |  |  | 20 |  |  |  | 87,018 |
Municipal obligations |  |  | 52,310 |  |  |  | 2,345 |  |  |  | 2 |  |  |  | 54,653 |
Subtotal - debt securities |  |  | 242,304 |  |  |  | 3,316 |  |  |  | 76 |  |  |  | 245,544 |
Mutual funds |  |  | 4,060 |  |  |  | 0 |  |  |  | 0 |  |  |  | 4,060 |
Total securities available for sale |  | $ | 246,364 |  |  | $ | 3,316 |  |  | $ | 76 |  |  | $ | 249,604 |
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 |  | $ | 2,939 |  |  | $ | 2,949 |  |  | $ | 0 |  |  | $ | 0 |
Due after one year through five years |  |  | 87,145 |  |  |  | 87,476 |  |  |  | 0 |  |  |  | 0 |
Due after five years through ten years |  |  | 17,626 |  |  |  | 18,072 |  |  |  |  |  |  |  |  |
Due after ten years |  |  | 31,446 |  |  |  | 33,174 |  |  |  | 0 |  |  |  | 0 |
|  |  | 139,156 |  |  |  | 141,671 |  |  |  | 0 |  |  |  | 0 |
Mortgage-backed securities and |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CMO |  |  | 103,148 |  |  |  | 103,873 |  |  |  | 3 |  |  |  | 3 |
|  | $ | 242,304 |  |  | $ | 245,544 |  |  | $ | 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 |  |  | 4 |  |  | $ | 18,987 |  |  | $ | 20 |
Agency CMO |  |  | 2 |  |  |  | 1,736 |  |  |  | 9 |
Agency mortgage-backed securities |  |  | 6 |  |  |  | 17,533 |  |  |  | 30 |
Muncipal obligations |  |  | 2 |  |  |  | 930 |  |  |  | 2 |
Total less than twelve months |  |  | 14 |  |  |  | 39,186 |  |  |  | 61 |
Continuous loss position more than twelve months: |  |  |  |  |  |  |  |  |  |  |  |
Agency CMO |  |  | 5 |  |  |  | 2,959 |  |  |  | 10 |
Agency mortgage-backed securities |  |  | 2 |  |  |  | 1,241 |  |  |  | 5 |
Total more than twelve months |  |  | 7 |  |  |  | 4,200 |  |  |  | 15 |
Total securities available for sale |  |  | 21 |  |  | $ | 43,386 |  |  | $ | 76 |

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