Commitments and Contingencies - Additional Information (Details) gal in Thousands	12 Months Ended
Dec. 31, 2008 gal	Jun. 30, 2016 MMBoe
Sylacauga, Talladega County, Alabama
Long-term Purchase Commitment [Line Items]
Gallons of wastewater transported \| gal	3
Crude Oil and Natural Gas
Long-term Purchase Commitment [Line Items]
Delivery commitments (MMBOE) \| MMBoe		4.8

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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