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Note 3 - Securities - Securities with Gross Unrealized Losses Not Recognized in Income (Details) $ in Thousands | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
--- | --- | ---
Estimated fair value, less than 12 months | $ 181,527 | $ 18,792
Unrealized losses, less than 12 months | (4,155) | (62)
Estimated fair value, 12 months or longer | 944 | 929
Unrealized losses, 12 months or longer | (1,233) | (1,253)
Estimated fair value, total | 182,471 | 19,721
Unrealized losses, total | $ (5,388) | $ (1,315)
Unrealized losses, less than 12 months, number of securities | 126 | 8
Unrealized losses, 12 months or longer, number of securities | 2 | 2
Unrealized losses, total, number of securities | 128 | 10
US Government-sponsored Enterprises Debt Securities [Member] |  |
Estimated fair value, less than 12 months | $ 12,617 | $ 4,975
Unrealized losses, less than 12 months | (264) | (24)
Estimated fair value, 12 months or longer | 0 | 0
Unrealized losses, 12 months or longer | 0 | 0
Estimated fair value, total | 12,617 | 4,975
Unrealized losses, total | (264) | (24)
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] |  |
Estimated fair value, less than 12 months | 112,550 | 11,953
Unrealized losses, less than 12 months | (2,906) | (36)
Estimated fair value, 12 months or longer | 0 | 0
Unrealized losses, 12 months or longer | 0 | 0
Estimated fair value, total | 112,550 | 11,953
Unrealized losses, total | (2,906) | (36)
US States and Political Subdivisions Debt Securities [Member] |  |
Estimated fair value, less than 12 months | 56,360 | 1,864
Unrealized losses, less than 12 months | (985) | (2)
Estimated fair value, 12 months or longer | 0 | 0
Unrealized losses, 12 months or longer | 0 | 0
Estimated fair value, total | 56,360 | 1,864
Unrealized losses, total | (985) | (2)
Collateralized Debt Obligations [Member] |  |
Estimated fair value, less than 12 months | 0 | 0
Unrealized losses, less than 12 months | 0 | 0
Estimated fair value, 12 months or longer | 944 | 929
Unrealized losses, 12 months or longer | (1,233) | (1,253)
Estimated fair value, total | 944 | 929
Unrealized losses, total | $ (1,233) | $ (1,253)

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=121645371&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=121645371&loc=d3e27290-111563 + Details
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