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Note 15 - Financial Derivatives (Tables) | 9 Months Ended
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Sep. 30, 2023
Notes Tables |
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] |
|  | September 30, 2023 |  |  | December 31, 2022 |
|  | (In thousands) |
Fair value swap hedges: |  |  |
Notional |  | $ | 857,341 |  |  | $ | 874,034 |
Weighted average fixed rate-pay |  |  | 1.80 | % |  |  | 2.12 | %
Weighted average variable rate spread |  |  | 0.27 | % |  |  | 0.68 | %
Weighted average variable rate-receive |  |  | 5.33 | % |  |  | 2.61 | %
Unrealized gain |  | $ | 27,378 |  |  | $ | 38,589 |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, 2023 |  |  | September 30, 2022 |  |  | September 30, 2023 |  |  | September 30, 2022 |
Periodic net settlement of swaps (1) |  | $ | 7,659 |  |  | $ | 1,461 |  |  | $ | 21,065 |  |  | $ | (1,628 | )
Derivatives Not Designated as Hedging Instruments [Table Text Block] |
Derivative financial instruments not designated as hedging instruments: |  | September 30, 2023 |  |  | December 31, 2022 |
|  | (In thousands) |
Notional amounts: |  |  |  |  |  |  |  |
Forward, and swap contracts with positive fair value |  | $ | 862,838 |  |  | $ | 72,996 |
Forward, and swap contracts with negative fair value |  | $ | 707,025 |  |  | $ | 170,213 |
Fair value: |  |  |  |  |  |  |  |
Forward, and swap contracts with positive fair value |  | $ | 56,858 |  |  | $ | 448 |
Forward, and swap contracts with negative fair value |  | $ | (56,939 | ) |  | $ | (942 | )

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