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Derivative Instruments - Schedule of Notional Volumes of Derivative Instruments (Details) - lb lb in Thousands | Sep. 30, 2020 | Jun. 30, 2020
--- | --- | ---
Derivative [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 33,021 | 44,761
Cash Flow Hedging | Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 24,413 | 36,413
Cash Flow Hedging | Not Designated as Hedging Instrument | Long |  |
Derivative [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 8,608 | 8,348

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