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Related party transactions (Tables)

6 Months Ended

Jun. 30, 2017

Related Party Transactions [Abstract]

Schedule of related party transactions

A summary of the aforementioned significant related party transactions for the three and six months ended June 30, 2017 and 2016 is as follows: 

	Three months ended June 30,								Six months ended June 30,
	2017				2016				2017				2016
Net sales to Glencore	$	296,271			$	290,283			$	576,844			$	570,660
Purchases from Glencore	41,587				50,177				113,168				94,190
Purchases from BHH	3,109				2,715				5,889				5,098

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- Definition

Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates.

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