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Note 4 - DERIVATIVES AND HEDGING ACTIVITIES - Cash flow hedging and fair value (Details) - Unhedged Derivatives - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Interest And Dividend Income |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract] |  |  |  |
Income and expense line items presented in the consolidated statements of income | $ 108,568 | $ 79,267 | $ 301,162 | $ 198,534
Interest Expense |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract] |  |  |  |
Income and expense line items presented in the consolidated statements of income | 53,313 | 18,498 | 135,892 | 32,632
Gain on interest rate caps on deposits | Cash Flow Hedges | Interest Expense |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract] |  |  |  |
Gain Loss From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness Net | (2,066) | (263) | (5,522) | 199
Loss on interest rate swaps and collars on loans | Cash Flow Hedges | Interest And Dividend Income |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract] |  |  |  |
Gain Loss From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness Net | (2,495) | (426) | (6,757) | 715
Gain on interest rate swaps on fixed rate loans | Fair Value Hedges | Interest And Dividend Income |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract] |  |  |  |
Gain Loss From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness Net | 828 |  | 828 |
Gain on interest rate swaps on junior subordinated debentures | Cash Flow Hedges | Interest Expense |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract] |  |  |  |
Gain Loss From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness Net | $ (328) | $ 73 | $ (830) | $ 536

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