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Note 21 - Fair Value (Details) $ in Thousands | Nov. 16, 2023 USD ($) | Oct. 12, 2023 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
--- | --- | --- | --- | ---
Securities available for sale, at fair value |  |  | $ 299,655 | $ 340,960
Derivatives |  |  | 187,341 | 177,631
Derivatives |  |  | 215,735 | 200,701
Trading securities |  |  | 22,369 |
Fair Value, Measurements, Recurring |  |  |  |
Derivatives |  |  | 187,341 | 177,631
Assets Fair Value |  |  | 509,365 | 518,591
Liabilities Fair Value |  |  | $ 215,735 | 200,701
Fair Value, Measurements, Recurring | Discount Rate | Minimum |  |  |  |
Measurement Input |  |  | 5.52 |
Fair Value, Measurements, Recurring | Discount Rate | Maximum |  |  |  |
Measurement Input |  |  | 7.56 |
Fair Value, Measurements, Recurring | Interest rate swaps |  |  |  |
Derivatives |  |  | $ 215,735 | 200,701
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 |  |  |  |
Derivatives |  |  | 187,341 | 177,631
Assets Fair Value |  |  | 486,996 | 518,591
Liabilities Fair Value |  |  | 215,735 | 200,701
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Interest rate swaps |  |  |  |
Derivatives |  |  | 215,735 | 200,701
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 |  |  |  |
Assets Fair Value |  |  | 22,369 |
Fair Value, Measurements, Nonrecurring |  |  |  |
Assets Fair Value |  |  | 35,111 | 30,909
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3 |  |  |  |
Assets Fair Value |  |  | 35,111 | 30,909
U.S. treasuries and govt. sponsored agency securities |  |  |  |
Securities available for sale, at fair value |  |  | 14,973 | 16,981
U.S. treasuries and govt. sponsored agency securities | Fair Value, Measurements, Recurring |  |  |  |
Securities available for sale, at fair value |  |  | 14,973 | 16,981
U.S. treasuries and govt. sponsored agency securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 |  |  |  |
Securities available for sale, at fair value |  |  | 14,973 | 16,981
Residential mortgage-backed and related securities |  |  |  |
Securities available for sale, at fair value |  |  | 59,196 | 66,215
Residential mortgage-backed and related securities | Fair Value, Measurements, Recurring |  |  |  |
Securities available for sale, at fair value |  |  | 59,196 | 66,215
Residential mortgage-backed and related securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 |  |  |  |
Securities available for sale, at fair value |  |  | 59,196 | 66,215
Municipal securities. |  |  |  |
Securities available for sale, at fair value |  |  | 170,987 | 193,178
Municipal securities. | Fair Value, Measurements, Recurring |  |  |  |
Securities available for sale, at fair value |  |  | 170,987 | 193,178
Municipal securities. | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 |  |  |  |
Securities available for sale, at fair value |  |  | 170,987 | 193,178
Asset-backed securities |  |  |  |
Securities available for sale, at fair value |  |  | 15,423 | 18,728
Asset-backed securities | Fair Value, Measurements, Recurring |  |  |  |
Securities available for sale, at fair value |  |  | 15,423 | 18,728
Asset-backed securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 |  |  |  |
Securities available for sale, at fair value |  |  | 15,423 | 18,728
Other securities |  |  |  |
Securities available for sale, at fair value |  |  | 39,076 | 45,858
Other securities | Fair Value, Measurements, Recurring |  |  |  |
Securities available for sale, at fair value |  |  | 39,076 | 45,858
Other securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 |  |  |  |
Securities available for sale, at fair value |  |  | 39,076 | 45,858
Securities trading | Fair Value, Measurements, Recurring |  |  |  |
Securities available for sale, at fair value |  |  | 22,369 |
Securities trading | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 |  |  |  |
Securities available for sale, at fair value |  |  | 22,369 |
M-series Tax exempt LIHTC loans |  |  |  |
Trading securities |  | $ 16,200 |  |
Recognized trading gain (loss) |  | $ 2,400 |  |
Q-series Tax exempt LIHTC loans |  |  |  |
Trading securities | $ 6,200 |  |  |
Recognized trading gain (loss) | $ 3,100 |  |  |
Impaired Loans Leases | Fair Value, Measurements, Nonrecurring |  |  |  |
Assets Fair Value |  |  | 33,656 | 30,765
Impaired Loans Leases | Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3 |  |  |  |
Assets Fair Value |  |  | 33,656 | 30,765
Other Real Estate Owned | Fair Value, Measurements, Nonrecurring |  |  |  |
Assets Fair Value |  |  | 1,455 | 144
Other Real Estate Owned | Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3 |  |  |  |
Assets Fair Value |  |  | $ 1,455 | $ 144

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