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Related Party Transactions (Tables)
 9 Months Ended
Sep. 30, 2016
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 
 September 30,
 
Nine Months Ended 
 September 30,
 
2016
 
2015
 
2016
 
2015
Sales to unconsolidated affiliates
$
5,047

 
$
5,738

 
$
19,452

 
$
19,744

Purchases from unconsolidated affiliates
30,591

 
42,698

 
93,372

 
95,837