Trade and other receivables (Tables)

12 Months Ended

Dec. 31, 2018

Subclassifications of assets, liabilities and equities [abstract]

Schedule of trade and other receivables

As at	Dec 31 2018		Dec 31 2017
Trade	$	412,662	$	429,582
Value-added and other tax receivables	37,823		36,584
Egypt gas contract recoveries(a)	6,227		24,466
Other	57,856		46,004
	$	514,568	$	536,636

a) Egypt gas contract recoveries:

The natural gas supply agreement in Egypt has a mechanism whereby the Company is partially compensated when gas delivery shortfalls exceed a certain threshold. The receivable is secured by a combination of funds held in escrow and a bank guarantee.