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Finance Costs	12 Months Ended
	Dec. 31, 2017
Borrowing costs [abstract]
Finance cost	Finance costs: Finance costs are primarily comprised of interest on borrowings and finance lease obligations, amortization of deferred financing fees and accretion expense associated with site restoration costs. Finance costs were $95.0 million for the year ended December 31, 2017 (2016 - $90.1 million).

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No definition available.

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- Definition

The disclosure of finance cost. [Refer: Finance costs]

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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