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Related party transactions (Tables)

12 Months Ended

Dec. 31, 2015

Related Party Transactions [Abstract]

Schedule of related party transactions

A summary of the aforementioned related party transactions for the years ended December 31, 2015, 2014 and 2013 is as follows:

	Year Ended December 31,
	2015			2014			2013
Net sales to Glencore	$	1,867,711		$	1,262,101		$	511,051
Purchases from Glencore	393,158			285,167			173,693
Purchases from BHH	46,592			47,804			86,678

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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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