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Derivative Instruments - Schedule of Notional Volumes of Derivative Instruments (Details) - lb lb in Thousands | 3 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Jun. 30, 2017
Derivative [Line Items] |  |
Derivative, Nonmonetary Notional Amount | (33,375) | (35,159)
Derivative contract term | 19 months |
Cash Flow Hedging | Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Derivative, Nonmonetary Notional Amount | (31,763) | (33,038)
Cash Flow Hedging | Not Designated as Hedging Instrument | Long |  |
Derivative [Line Items] |  |
Derivative, Nonmonetary Notional Amount | (1,612) | (2,121)

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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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