Commitments and Contingencies Additional Information (Details) - Transportation Service Agreement [Member]	1 Months Ended
Jun. 30, 2017 MMBTU
Supply Commitment [Line Items]
Energy commitment per day (in MMbtus)	40,000
Supply commitment term	1 year

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.

No definition available.

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