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Acquisitions - Pro Forma Financial Information (Details) - Wyoming Refining Company $ / shares in Units, $ in Thousands | 3 Months Ended
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Mar. 31, 2016 USD ($) $ / shares
Business Acquisition [Line Items] |
Revenues | $ | $ 438,233
Net loss | $ | $ (31,155)
Earnings (loss) per share |
Basic (in dollars per shares) | $ / shares | $ (0.76)
Diluted (in dollars per shares) | $ / shares | $ (0.76)

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