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Note 15 - Financial Derivatives - Fair Value Swap Hedges (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Net unrealized gain (1) |  | $ 3,054 | $ 1,263 |
Periodic net settlement of SWAPs | [1] | (1,762) | $ (2,387) |
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] |  |  |  |
Derivative, Notional Amount |  | $ 666,446 |  | $ 729,280
Weighted average fixed rate-pay |  | 2.18% |  | 2.65%
Weighted average variable rate-receive |  | 1.22% |  | 1.43%
Net unrealized gain (1) | [2] | $ 15,387 |  | $ (1,013)
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |
Weighted average variable rate spread |  | 1.02% |  | 1.31%
[1] | the amount of periodic net settlement of interest rate swaps was included in interest income.
[2] | the amount is included in other non-interest income.

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- Definition The amount of income for periodic net settlements on interest rate swaps. + References No definition available. + Details
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- Definition Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986 + Details
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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959 + Details
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