MINING INTERESTS

12 Months Ended

Dec. 31, 2017

Property, plant and equipment [abstract]

MINING INTERESTS

7. MINING INTERESTS

The following table shows the breakdown of the cost, accumulated depreciation and net book value of plant and equipment, mining properties and construction in progress:

	Plant and equipment			Mining properties		Construction in progress			Total
Cost
As of December 31, 2015	$	452,645		$	729,746	$	71,902		$	1,254,293
Additions	613			2,108		75,375			78,096
Transfers	9,379			12,749		(22,128		)	—
Capitalized interest	—			—		6,260			6,260
Change in rehabilitation provision estimate	—			2,054		—			2,054
Disposals and other	(1,199		)	—		—			(1,199		)
As of December 31, 2016	$	461,438		$	746,657	$	131,409		$	1,339,504
Additions	649			632		63,072			64,353
Transfers	24,269			48,122		(72,391		)	—
Capitalized interest	—			—		5,285			5,285
Change in rehabilitation provision estimate	—			3,022		—			3,022
Disposals and other	(7,142		)	—		(452		)	(7,594		)
As of December 31, 2017	$	479,214		$	798,433	$	126,923		$	1,404,570
Accumulated depreciation
As of December 31, 2015	$	423,665		$	680,779	$	—		$	1,104,444
Depreciation and amortization	8,673			12,010		—			20,683
Disposals and other	(640		)	—		—			(640		)
As of December 31, 2016	$	431,698		$	692,789	$	—		$	1,124,487
Depreciation and amortization	12,385			20,431		—			32,816
Disposals and other	(6,791		)	—		—			(6,791		)
As of December 31, 2017	$	437,292		$	713,220	$	—		$	1,150,512
Carrying amount
As of December 31, 2015	$	28,980		$	48,967	$	71,902		$	149,849
As of December 31, 2016	$	29,740		$	53,868	$	131,409		$	215,017
As of December 31, 2017	$	41,922		$	85,213	$	126,923		$	254,058

As at December 31, 2017, equipment under finance leases had net carrying amounts of $1.6 million (December 31, 2016 - $1.1 million). The total minimum lease payments are disclosed in Note 12 - Debt.

No depreciation is charged to construction in progress assets. For the year ended December 31, 2017, the general capitalization rate for borrowing costs was 7%.