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Note 3 - Securities - Securities in a Continuous Loss Position (Details) Pure in Thousands, $ in Thousands | Sep. 30, 2024 USD ($) | Dec. 31, 2023 USD ($)
--- | --- | ---
Number of Securities | 164 | 199
Less than 12 months, fair value | $ 49,769 | $ 52,079
Less than 12 months, unrealized loss | (286) | (465)
12 months or more, fair value | 301,971 | 336,756
12 months or more, unrealized loss | (23,804) | (29,679)
U.S. agencies | 351,740 | 388,835
U.S. agencies | $ (24,090) | $ (30,144)
US Government Agencies Debt Securities [Member] |  |
Number of Securities | 37 | 51
Less than 12 months, fair value | $ 4,966 | $ 190
Less than 12 months, unrealized loss | (119) | (3)
12 months or more, fair value | 57,899 | 79,556
12 months or more, unrealized loss | (2,987) | (4,427)
U.S. agencies | 62,865 | 79,746
U.S. agencies | $ (3,106) | $ (4,430)
Collateralized Mortgage Obligations [Member] |  |
Number of Securities | 6 | 6
Less than 12 months, fair value | $ 8,286 | $ 4,791
Less than 12 months, unrealized loss | (7) | (1)
12 months or more, fair value | 3,568 | 3,873
12 months or more, unrealized loss | (348) | (443)
U.S. agencies | 11,854 | 8,664
U.S. agencies | $ (355) | $ (444)
US States and Political Subdivisions Debt Securities [Member] |  |
Number of Securities | 93 | 106
Less than 12 months, fair value | $ 28,246 | $ 44,859
Less than 12 months, unrealized loss | (139) | (453)
12 months or more, fair value | 183,696 | 178,812
12 months or more, unrealized loss | (17,383) | (19,412)
U.S. agencies | 211,942 | 223,671
U.S. agencies | $ (17,522) | $ (19,865)
SBA Pool [Member] |  |
Number of Securities | 3 | 4
Less than 12 months, fair value | $ 128 | $ 116
Less than 12 months, unrealized loss | 0 | 0
12 months or more, fair value | 160 | 472
12 months or more, unrealized loss | (1) | (2)
U.S. agencies | 288 | 588
U.S. agencies | $ (1) | $ (2)
Corporate Debt Securities [Member] |  |
Number of Securities | 11 | 13
Less than 12 months, fair value | $ 0 | $ 0
Less than 12 months, unrealized loss | 0 | 0
12 months or more, fair value | 39,023 | 41,508
12 months or more, unrealized loss | (2,477) | (3,992)
U.S. agencies | 39,023 | 41,508
U.S. agencies | $ (2,477) | $ (3,992)
Asset-Backed Securities [Member] |  |
Number of Securities | 14 | 19
Less than 12 months, fair value | $ 8,143 | $ 2,123
Less than 12 months, unrealized loss | (21) | (8)
12 months or more, fair value | 17,625 | 32,535
12 months or more, unrealized loss | (608) | (1,403)
U.S. agencies | 25,768 | 34,658
U.S. agencies | $ (629) | $ (1,411)

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-5 + Details
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