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Acquisitions (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Sep. 15, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Property, plant and equipment | $ 250,652 |  | $ 251,029
Intangible assets (1) | 16,182 |  | 14,420
Total assets | $ 422,858 |  | $ 415,547
Big Spring Pipeline [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Property, plant and equipment |  | $ 6,443 |
Intangible assets (1) |  | 2,560 |
Total assets |  | $ 9,003 |

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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