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Related Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2017
Related Party Transactions [Abstract]  
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:
 
December 31, 2017
 
December 31, 2016
 
December 31, 2015
Sales(1)
$
33,949

 
$
35,418

 
$
35,843

Purchases(1)
953

 
548

 
545

Dividends received(2)
5,382

 
3,022

 
1,917

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