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Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parentheticals) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Adjustment for pension and postretirement benefit liability, tax | $ 14 | $ 19
Adjustment for interest rate swap, tax | $ (133) | $ 540

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