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Related Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2016
Related Party Transactions [Abstract]  
Schedule of Related Party Transactions
Our consolidated financial statements include sales to and purchases from unconsolidated affiliates in the ordinary course of business as follows (in thousands):
 
Year Ended December 31,
 
2016
 
2015
 
2014
Sales to unconsolidated affiliates
$
29,651

 
$
24,180

 
$
45,415

Purchases from unconsolidated affiliates
130,287

 
115,697

 
64,631