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Related Party Transactions (Tables) | 6 Months Ended
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Jun. 30, 2018
Related Party Transactions [Abstract] |
Schedule of Related Party Transactions | Our consolidated statements of income include sales to and purchases from unconsolidated affiliates in the ordinary course of business as follows (in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Sales to unconsolidated affiliates | $ | 11,033 |  |  | $ | 9,255 |  |  | $ | 15,638 |  |  | $ | 16,444 |
Purchases from unconsolidated affiliates | $ | 57,059 |  |  | $ | 55,949 |  |  | $ | 125,975 |  |  | $ | 96,519 |
Our condensed consolidated balance sheets include accounts receivable due from and payable to unconsolidated affiliates in the ordinary course of business as follows (in thousands):
| June 30, 2018 |  | December 31, 2017
Receivable from related parties | $ | 3,239 |  |  | $ | 2,406 |
Payable to related parties | $ | 56,753 |  |  | $ | 55,801 |

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
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