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Note 3 - Securities - Securities with Gross Unrealized Losses Not Recognized in Income (Details) $ in Thousands | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
--- | --- | ---
Estimated fair value, less than 12 months | $ 13,226 | $ 51,066
Unrealized losses, less than 12 months | (76) | (671)
Estimated fair value, 12 months or longer | 16,141 | 98,644
Unrealized losses, 12 months or longer | (1,191) | (4,104)
Estimated fair value, total | 29,367 | 149,710
Unrealized losses, total | $ (1,267) | $ (4,775)
Unrealized losses, less than 12 months, number of securities | 8 | 52
Unrealized losses, 12 months or longer, number of securities | 19 | 75
Unrealized losses, total, number of securities | 27 | 127
US Government-sponsored Enterprises Debt Securities [Member] |  |
Estimated fair value, less than 12 months |  |
Unrealized losses, less than 12 months |  |
Estimated fair value, 12 months or longer |  | 3,866
Unrealized losses, 12 months or longer |  | (131)
Estimated fair value, total |  | 3,866
Unrealized losses, total |  | (131)
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] |  |
Estimated fair value, less than 12 months | 8,859 | 28,388
Unrealized losses, less than 12 months | (31) | (304)
Estimated fair value, 12 months or longer | 15,065 | 89,234
Unrealized losses, 12 months or longer | (65) | (2,384)
Estimated fair value, total | 23,924 | 117,622
Unrealized losses, total | (96) | (2,688)
US States and Political Subdivisions Debt Securities [Member] |  |
Estimated fair value, less than 12 months | 4,367 | 22,678
Unrealized losses, less than 12 months | (45) | (367)
Estimated fair value, 12 months or longer |  | 3,495
Unrealized losses, 12 months or longer |  | (157)
Estimated fair value, total | 4,367 | 26,173
Unrealized losses, total | (45) | (524)
Collateralized Debt Obligations [Member] |  |
Estimated fair value, less than 12 months |  |
Unrealized losses, less than 12 months |  |
Estimated fair value, 12 months or longer | 1,076 | 2,049
Unrealized losses, 12 months or longer | (1,126) | (1,432)
Estimated fair value, total | 1,076 | 2,049
Unrealized losses, total | $ (1,126) | $ (1,432)

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References No definition available. + Details
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X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27337-111563 + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. + References No definition available. + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References No definition available. + Details
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- Definition Number of investment positions in available-for-sale investments in a continuous unrealized loss position for less than one year or normal operating cycle, if longer, for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. + References No definition available. + Details
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- Definition Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27290-111563 + Details
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