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Summary of Significant Accounting Policies (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2016 USD ($) customer | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Basis of Consolidation |  |  |
Percentage of holders of the outstanding common units required to vote for removal of the general partner | 66.67% |  |
Cash and Cash Equivalents |  |  |
Checks issued but not presented to banks | $ 18.1 | $ 24.7 |
Inventory, Net [Abstract] |  |  |
Lower of FIFO cost or market inventory adjustment |  |  | $ 36.8
Accounts receivable | Credit concentration |  |  |
Accounts Receivable, net |  |  |
Number of customers | customer | 1 |  |
Customers individually representing greater than this percentage for disclosure | 10.00% | 9.00% |

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