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Note 5 - Financing Arrangements - Effects of Derivative Instruments on Comprehensive Income (Loss) (Details) - Interest Rate Swap [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Amount of (loss) gain recognized in AOCI on derivatives | $ 1,039 | $ (809) | $ 0
Amount of (loss) gain reclassed from AOCI into income | $ (1,630) | $ 0 | $ 0

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