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Related Party Transactions (Tables)
 3 Months Ended
Mar. 31, 2017
Related Party Transactions [Abstract]  
Schedule of Related Party Transactions
Our condensed consolidated financial statements include sales to and purchases from unconsolidated affiliates in the ordinary course of business as follows (in thousands):
 
Three Months Ended 
 March 31,
 
2017
 
2016
Sales to unconsolidated affiliates
$
7,189

 
$
6,174

Purchases from unconsolidated affiliates
40,570

 
35,621