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Acquisitions Acquisitions from Delek (Details) - USD ($) $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2015 | Feb. 10, 2014 | Dec. 31, 2014
El Dorado Assets [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Payments to Acquire Businesses, Gross | $ 42.5 |  |
Historical carrying value | 7.6 |  |
El Dorado Terminal and Tank Assets [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Payments to Acquire Businesses, Gross |  | $ 95.9 | $ 95.9
Historical carrying value |  | $ 25.2 |
Tyler Assets [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Payments to Acquire Businesses, Gross | 19.4 |  |
Historical carrying value | $ 11.6 |  |

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