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Other Financial Information (Schedule of Renewable Identification Numbers (RINs) and Other Revenue) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Other Financial Information [Abstract] |  |  |  |
Renewable Identification Numbers (RINs) sales | $ 48,047 | $ 20,037 | $ 130,690 | $ 93,883
Other | 772 | 717 | 2,940 | 2,331
Other operating revenues | $ 48,819 | $ 20,754 | $ 133,630 | $ 96,214

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