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Acquisitions Acquisitions from Delek Narrative (Details) - USD ($) $ in Millions | Mar. 31, 2015 | Feb. 10, 2014
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El Dorado Assets [Member] |  |
Business Acquisition [Line Items] |  |
Purchase price for acquisition | $ 42.5 |
Historical carrying value of assets | 7.6 |
Tyler Assets [Member] |  |
Business Acquisition [Line Items] |  |
Purchase price for acquisition | 19.4 |
Historical carrying value of assets | $ 11.6 |
El Dorado [Member] |  |
Business Acquisition [Line Items] |  |
Purchase price for acquisition |  | $ 95.9
Historical carrying value of assets |  | $ 25.2

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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
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