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Note 5 - Financing Arrangements - Summary of Interest Rate Swap Agreements (Details) - Interest Rate Swap [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Notional amount | $ 161,875 | $ 170,600
Average fixed rate | 4.10% | 4.10%

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- Details
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