Related parties - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Disclosure of associates [line items]
Revenue	$ 3,931,847	$ 3,060,642
Atlas Methanol Company Unlimited
Disclosure of associates [line items]
Percentage of marketing rights in production	100.00%
Loans outstanding from related party transactions	$ 76,322	76,322
Associates \| Atlas Methanol Company Unlimited
Disclosure of associates [line items]
Revenue	512,000	459,000
Receivables from related party transactions	10,000	13,000
Payables from related party transactions	134,000	89,000
Loans outstanding from related party transactions	$ 76,000	$ 76,000

The income arising in the course of an entity's ordinary activities. Income is increases in economic benefits during the accounting period in the form of inflows or enhancements of assets or decreases of liabilities that result in an increase in equity, other than those relating to contributions from equity participants.

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+ Details