Commitments and Contingencies - Legal and Environmental Matters (Details) gal in Thousands, a in Thousands		12 Months Ended
Nov. 04, 2015 a	Dec. 31, 2008 gal
Sylacauga, Talladega County, Alabama
Long-term Purchase Commitment [Line Items]
Gallons of wastewater transported \| gal		3
Endeavor Energy Resources \| Pending Litigation
Long-term Purchase Commitment [Line Items]
Number of acres with cloud on the title \| a	10

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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