Trade Receivables - Breakdown in Trade Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Receivables [Abstract]
Trade accounts receivables	$ 363,273	$ 497,800
(Less) Allowance for credit losses	(33,294)	(16,068)	$ (19,546)	$ (25,918)
Net book value at end of period	$ 329,979	$ 481,732

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant