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Note 2 - Investment Securities (Tables) | 3 Months Ended
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Mar. 31, 2019
Notes Tables |
Marketable Securities [Table Text Block] |
(In thousands) |  |  | Amortized Cost |  |  |  | Gross Unrealized Gains |  |  |  | Gross Unrealized Losses |  |  |  | Fair Value |
March 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  | $ | 89,739 |  |  | $ | 1 |  |  | $ | 2,365 |  |  | $ | 87,375 |
Agency CMO |  |  | 36,356 |  |  |  | 91 |  |  |  | 351 |  |  |  | 36,096 |
Other debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency notes and bonds |  |  | 65,791 |  |  |  | 149 |  |  |  | 739 |  |  |  | 65,201 |
Municipal obligations |  |  | 65,319 |  |  |  | 1,200 |  |  |  | 156 |  |  |  | 66,363 |
Total securities available for sale |  | $ | 257,205 |  |  | $ | 1,441 |  |  | $ | 3,611 |  |  | $ | 255,035 |
December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  | $ | 94,746 |  |  | $ | - |  |  | $ | 3,489 |  |  | $ | 91,257 |
Agency CMO |  |  | 33,222 |  |  |  | 152 |  |  |  | 382 |  |  |  | 32,992 |
Other debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency notes and bonds |  |  | 75,461 |  |  |  | 59 |  |  |  | 1,016 |  |  |  | 74,504 |
Municipal obligations |  |  | 63,008 |  |  |  | 651 |  |  |  | 571 |  |  |  | 63,088 |
Total securities available for sale |  | $ | 266,437 |  |  | $ | 862 |  |  | $ | 5,458 |  |  | $ | 261,841 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Securities Available for Sale
|  |  | Amortized Cost |  |  |  | Fair Value |
(In thousands) |  |  |  |  |  |  |  |
Due in one year or less |  | $ | 18,773 |  |  | $ | 18,667 |
Due after one year through five years |  |  | 56,424 |  |  |  | 56,002 |
Due after five years through ten years |  |  | 32,260 |  |  |  | 32,636 |
Due after ten years |  |  | 23,653 |  |  |  | 24,259 |
|  |  | 131,110 |  |  |  | 131,564 |
Mortgage-backed securities and |  |  |  |  |  |  |  |
CMO |  |  | 126,095 |  |  |  | 123,471 |
|  | $ | 257,205 |  |  | $ | 255,035 |
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 CMO |  |  | 5 |  |  | $ | 8,429 |  |  | $ | 24 |
Agency notes and bonds |  |  | 1 |  |  |  | 2,997 |  |  |  | 3 |
Muncipal obligations |  |  | 1 |  |  |  | 275 |  |  |  | 1 |
Total less than twelve months |  |  | 7 |  |  |  | 11,701 |  |  |  | 28 |
Continuous loss position more than twelve months: |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  |  | 91 |  |  |  | 85,872 |  |  |  | 2,365 |
Agency CMO |  |  | 20 |  |  |  | 11,313 |  |  |  | 327 |
Agency notes and bonds |  |  | 16 |  |  |  | 52,946 |  |  |  | 736 |
Muncipal obligations |  |  | 31 |  |  |  | 17,130 |  |  |  | 155 |
Total more than twelve months |  |  | 158 |  |  |  | 167,261 |  |  |  | 3,583 |
Total securities available for sale |  |  | 165 |  |  | $ | 178,962 |  |  | $ | 3,611 |
|  | Number of Investment Positions |  |  | Fair Value |  |  |  | Gross Unrealized Losses |
(Dollars in thousands) |  |  |  |  |  |
Continuous loss position less than twelve months: |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  |  | 1 |  |  | $ | 1,563 |  |  | $ | 13 |
Agency CMO |  |  | 4 |  |  |  | 2,870 |  |  |  | 1 |
Agency notes and bonds |  |  | 1 |  |  |  | 499 |  |  |  | 1 |
Muncipal obligations |  |  | 11 |  |  |  | 3,552 |  |  |  | 12 |
Total less than twelve months |  |  | 17 |  |  |  | 8,484 |  |  |  | 27 |
Continuous loss position more than twelve months: |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  |  | 97 |  |  |  | 89,680 |  |  |  | 3,476 |
Agency CMO |  |  | 24 |  |  |  | 12,168 |  |  |  | 381 |
Agency notes and bonds |  |  | 22 |  |  |  | 67,927 |  |  |  | 1,015 |
Muncipal obligations |  |  | 49 |  |  |  | 25,316 |  |  |  | 559 |
Total more than twelve months |  |  | 192 |  |  |  | 195,091 |  |  |  | 5,431 |
Total securities available for sale |  |  | 209 |  |  | $ | 203,575 |  |  | $ | 5,458 |

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