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Related Party Transactions (Tables)
 9 Months Ended
Sep. 30, 2018
Related Party Transaction [Line Items]  
Schedule of Related Party Transactions [Table Text Block]
A summary of the material related party transactions with affiliates accounted for under the equity method was as follows:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2018
 
2017
 
2018
 
2017
Sales(1)
$
7,222

 
$
8,288

 
$
23,302

 
$
26,124

Purchases(1)
204

 
186

 
614

 
580

Dividends received(2)
239

 
—

 
4,747

 
5,382


(1) Relates to transactions with Nishikawa Cooper LLC (“NISCO”)
(2) From NISCO and Nishikawa Tachaplalert Cooper Ltd.