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Finance costs (Tables)

12 Months Ended

Dec. 31, 2018

Finance Costs [Abstract]

Schedule of finance costs

		2018			2017
Interest on long-term debt	$	73,039		$	73,211
Unwinding of discount on provisions [note 15]		23,681			22,020
Other charges		15,059			15,377
Total	$	111,779		$	110,608

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