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Provisions (Tables)

12 Months Ended

Dec. 31, 2017

Provisions [Abstract]

Roll Forward of provisions for reclamation and waste disposal



		Reclamation			Waste disposal			Total


Beginning of year		$	899,261		$	9,521		$	908,782
Changes in estimates and discount rates
	Capitalized in property, plant and equipment [note 8]		17,541			-			17,541
	Recognized in earnings		43			(546)			(503)
Provisions used during the period			(13,343)			(989)			(14,332)
Unwinding of discount [note 17]			21,866			154			22,020
Effect of movements in exchange rates			(19,968)			-			(19,968)

End of period		$	905,400		$	8,140		$	913,540


Current		$	36,617		$	1,890		$	38,507
Non-current			868,783			6,250			875,033

		$	905,400		$	8,140		$	913,540

Reclamation provisions


		2017			2016


Uranium	$	669,835		$	645,219
Fuel services		235,565			254,042

Total	$	905,400		$	899,261