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Note 10. Derivative Financial Instruments (Details) - Risk Management - Commodity swap contracts [Member] - Cash Flow Hedging [Member] - USD ($) $ in Millions | 12 Months Ended |  |
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Dec. 31, 2024 | Apr. 30, 2024 | Jul. 31, 2022
Derivatives, Fair Value [Line Items] |  |  |
Derivative, notional amount |  | $ 7.6 | $ 70.5
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | $ (0.4) |  |

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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480870/815-30-50-1 + 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 -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A + Details
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