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- Other long-term liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Subclassifications of assets, liabilities and equities [abstract]
Site restoration costs	$ 33,975	$ 30,512
Finance lease liabilities	204,242	201,268
Share-based compensation liability (note 13)	111,405	53,725
Cash flow hedges (note 18)	90,199	68,664
Defined benefit pension plans (note 20)	25,076	22,403
Other	5,214	4,339
Other long-term liabilities, total	470,111	380,911
Less current maturities	(65,226)	(29,720)
Other non-current liabilities	$ 404,885	$ 351,191

X

- Definition

The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

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- Definition

The amount of liabilities related to finance leases.

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- Definition

The amount of liabilities arising from share-based payment transactions. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. [Refer: Share-based payment arrangements [member]]

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The amount of current liabilities that the entity does not separately disclose in the same statement or note. [Refer: Current liabilities]

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The amount of liabilities that the entity does not separately disclose in the same statement or note.

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The amount of non-current liabilities that the entity does not separately disclose in the same statement or note. [Refer: Non-current liabilities]

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- Definition

The amount of provision for costs related to decommissioning, restoration and rehabilitation. [Refer: Other provisions]

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The amount of provisions for employee benefits. [Refer: Employee benefits expense; Provisions]

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Other Sundry Liabilities Noncurrent

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