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Derivative Instruments - Schedule of Notional Volumes of Derivative Instruments (Details) - lb lb in Thousands | Dec. 31, 2019 | Jun. 30, 2019
--- | --- | ---
Derivative [Line Items] |  |
Derivative, Nonmonetary Notional Amount | (41,963) | (48,183)
Cash Flow Hedging | Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Derivative, Nonmonetary Notional Amount | (40,725) | (42,113)
Cash Flow Hedging | Not Designated as Hedging Instrument | Long |  |
Derivative [Line Items] |  |
Derivative, Nonmonetary Notional Amount | (1,238) | (6,070)

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