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Commitments and Contingencies Contracts and Agreements (Details) | 12 Months Ended
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Dec. 31, 2016 bbl / pure
Noble Petro, Inc. [Member] | Abilene Contract [Member] | Inventories [Member] |
Long-term Purchase Commitment [Line Items] |
Maximum Purchases under Supply Contract | 20,350

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- Definition Maximum Purchases under Supply Contract + References No definition available. + Details
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- Details
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