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Note 2 - INVESTMENT SECURITIES - Securities in a Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Securities HTM: |  |
Securities HTM, Less than 12 Months, Fair Value | $ 235,836 |
Securities HTM, Less than 12 Months, Gross Unrealized Losses | (20,777) |
Securities HTM, 12 Months or More, Fair Value | 237,690 |
Securities HTM, 12 Months or More, Gross Unrealized Losses | (71,967) |
Securities HTM, Total, Fair Value | 473,526 |
Securities HTM, Total, Gross Unrealized Losses | (92,744) |
Securities AFS: |  |
Securities AFS, Less than 12 Months, Fair Value | 6,616 | $ 280,669
Securities AFS, Less than 12 Months, Gross Unrealized Losses | (467) | (48,923)
Securities AFS, 12 Months or More, Fair Value | 264,116 | 42,212
Securities AFS, 12 Months or More, Gross Unrealized Losses | (73,062) | (10,788)
Securities AFS, Total, Fair Value | 270,732 | 322,881
Securities AFS, Total, Gross Unrealized Losses | (73,529) | (59,711)
Municipal securities. |  |
Securities HTM: |  |
Securities HTM, Less than 12 Months, Fair Value | 235,313 | 347,651
Securities HTM, Less than 12 Months, Gross Unrealized Losses | (20,751) | (56,798)
Securities HTM, 12 Months or More, Fair Value | 237,690 |
Securities HTM, 12 Months or More, Gross Unrealized Losses | (71,967) |
Securities HTM, Total, Fair Value | 473,003 | 347,651
Securities HTM, Total, Gross Unrealized Losses | (92,718) | (56,798)
Securities AFS: |  |
Securities AFS, Less than 12 Months, Fair Value | 1,067 | 178,172
Securities AFS, Less than 12 Months, Gross Unrealized Losses | (38) | (42,661)
Securities AFS, 12 Months or More, Fair Value | 148,159 | 9,809
Securities AFS, 12 Months or More, Gross Unrealized Losses | (57,508) | (4,039)
Securities AFS, Total, Fair Value | 149,226 | 187,981
Securities AFS, Total, Gross Unrealized Losses | (57,546) | (46,700)
U.S. treasuries and govt. sponsored agency securities |  |
Securities AFS: |  |
Securities AFS, Less than 12 Months, Fair Value | 1,649 | 5,138
Securities AFS, Less than 12 Months, Gross Unrealized Losses | (1) | (326)
Securities AFS, 12 Months or More, Fair Value | 13,377 | 10,591
Securities AFS, 12 Months or More, Gross Unrealized Losses | (3,140) | (2,457)
Securities AFS, Total, Fair Value | 15,026 | 15,729
Securities AFS, Total, Gross Unrealized Losses | (3,141) | (2,783)
Residential mortgage-backed and related securities |  |
Securities AFS: |  |
Securities AFS, Less than 12 Months, Fair Value | 77 | 48,469
Securities AFS, Less than 12 Months, Gross Unrealized Losses | (1) | (3,327)
Securities AFS, 12 Months or More, Fair Value | 57,869 | 17,690
Securities AFS, 12 Months or More, Gross Unrealized Losses | (8,486) | (3,896)
Securities AFS, Total, Fair Value | 57,946 | 66,159
Securities AFS, Total, Gross Unrealized Losses | (8,487) | (7,223)
Asset-backed securities |  |
Securities AFS: |  |
Securities AFS, Less than 12 Months, Fair Value |  | 13,684
Securities AFS, Less than 12 Months, Gross Unrealized Losses |  | (205)
Securities AFS, 12 Months or More, Fair Value | 10,521 |
Securities AFS, 12 Months or More, Gross Unrealized Losses | (44) |
Securities AFS, Total, Fair Value | 10,521 | 13,684
Securities AFS, Total, Gross Unrealized Losses | (44) | (205)
Other securities |  |
Securities HTM: |  |
Securities HTM, Less than 12 Months, Fair Value | 523 |
Securities HTM, Less than 12 Months, Gross Unrealized Losses | (26) |
Securities HTM, Total, Fair Value | 523 |
Securities HTM, Total, Gross Unrealized Losses | (26) |
Securities AFS: |  |
Securities AFS, Less than 12 Months, Fair Value | 3,823 | 35,206
Securities AFS, Less than 12 Months, Gross Unrealized Losses | (427) | (2,404)
Securities AFS, 12 Months or More, Fair Value | 34,190 | 4,122
Securities AFS, 12 Months or More, Gross Unrealized Losses | (3,884) | (396)
Securities AFS, Total, Fair Value | 38,013 | 39,328
Securities AFS, Total, Gross Unrealized Losses | $ (4,311) | $ (2,800)

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