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Vectren Fuels Acquisition (Narrative) (Details) (USD $) | 3 Months Ended | 9 Months Ended | 1 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 Vectren Fuels [Member] | Sep. 30, 2014 Vectren Fuels [Member] | Aug. 29, 2014 Vectren Fuels [Member]
Business Acquisition [Line Items] |  |  |  |  |  |  |
Revenues | $ 66,322,000 | $ 37,660,000 | $ 140,549,000 | $ 116,058,000 | $ 26,600,000 |  |
Income before income taxes | (7,209,000) | 6,498,000 | 1,003,000 | 24,675,000 | 2,500,000 |  |
Closing expenses |  |  |  |  |  |  | 7,900,000
Business acquisition purchase price |  |  |  |  | $ 320,000,000 | $ (319,762,000) |

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