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Note 2 - INVESTMENT SECURITIES - Amortized Cost and Fair Value of Investment Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Securities HTM: |  |  |  |
Securities HTM, Amortized cost | $ 562,149 | $ 587,322 |  |
Securities HTM, Allowance for Credit (Losses) | (180) | (180) |  |
Securities HTM, Gross Unrealized Gains | 10,578 | 5,292 |  |
Securities HTM, Gross Unrealized (Losses) | (43,581) | (56,798) |  |
Securities HTM, Fair Value | 528,966 | 535,636 |  |
Securities held to maturity, at amortized cost, net of allowance for credit losses | 561,969 | 587,142 |  |
Securities AFS: |  |  |  |
Securities AFS, Amortized Cost | 367,636 | 400,511 |  |
Securities AFS, Allowance for Credit (Losses) | (989) |  |  |
Securities AFS, Gross Unrealized Gains | 79 | 160 |  |
Securities AFS, Gross Unrealized (Losses) | (51,249) | (59,711) |  |
Securities AFS, Fair Value | 315,477 | 340,960 |  |
U.S. treasuries and govt. sponsored agency securities |  |  |  |
Securities AFS: |  |  |  |
Securities AFS, Amortized Cost | 21,697 | 19,745 |  |
Securities AFS, Gross Unrealized Gains | 16 | 19 |  |
Securities AFS, Gross Unrealized (Losses) | (2,393) | (2,783) |  |
Securities AFS, Fair Value | 19,320 | 16,981 |  |
Residential mortgage-backed and related securities |  |  |  |
Securities AFS: |  |  |  |
Securities AFS, Amortized Cost | 69,415 | 73,438 |  |
Securities AFS, Gross Unrealized (Losses) | (6,311) | (7,223) |  |
Securities AFS, Fair Value | 63,104 | 66,215 |  |
Municipal securities. |  |  |  |
Securities HTM: |  |  |  |
Securities HTM, Amortized cost | 561,099 | 586,272 |  |
Securities HTM, Allowance for Credit (Losses) | (180) | (180) | $ (198) | $ (198)
Securities HTM, Gross Unrealized Gains | 10,578 | 5,292 |  |
Securities HTM, Gross Unrealized (Losses) | (43,563) | (56,798) |  |
Securities HTM, Fair Value | 527,934 | 534,586 |  |
Securities AFS: |  |  |  |
Securities AFS, Amortized Cost | 209,875 | 239,812 |  |
Securities AFS, Gross Unrealized Gains | 9 | 66 |  |
Securities AFS, Gross Unrealized (Losses) | (39,294) | (46,700) |  |
Securities AFS, Fair Value | 170,590 | 193,178 |  |
Asset-backed securities |  |  |  |
Securities AFS: |  |  |  |
Securities AFS, Amortized Cost | 18,087 | 18,885 |  |
Securities AFS, Gross Unrealized Gains | 47 | 48 |  |
Securities AFS, Gross Unrealized (Losses) | (167) | (205) |  |
Securities AFS, Fair Value | 17,967 | 18,728 |  |
Other securities |  |  |  |
Securities HTM: |  |  |  |
Securities HTM, Amortized cost | 1,050 | 1,050 |  |
Securities HTM, Gross Unrealized (Losses) | (18) |  |  |
Securities HTM, Fair Value | 1,032 | 1,050 |  |
Securities AFS: |  |  |  |
Securities AFS, Amortized Cost | 48,562 | 48,631 |  |
Securities AFS, Allowance for Credit (Losses) | (989) |  |  |
Securities AFS, Gross Unrealized Gains | 7 | 27 |  |
Securities AFS, Gross Unrealized (Losses) | (3,084) | (2,800) |  |
Securities AFS, Fair Value | $ 44,496 | $ 45,858 |  |

X
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