PROPERTY, PLANT AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure of detailed information about property, plant and equipment [abstract]

Schedule of changes in property, plant and equipment

	Land		Buildings		Manufacturing equipment		Computer equipment and software		Furniture, office equipment and other		Construction in progress		Total
	$		$		$		$		$		$		$
Gross carrying amount
Balance as of December 31, 2015	3,363		84,776		523,147		64,027		2,651		40,740		718,704
Additions – separately acquired	—		—		—		—		—		58,679		58,679
Additions through business acquisitions	2,583		1,908		5,083		21		46		9		9,650
Assets placed into service	250		6,570		47,603		815		122		(55,360	)	—
Disposals	—		(534	)	(20,124	)	(23,439	)	(352	)	—		(44,449	)
Foreign exchange and other	(66	)	225		1,608		219		—		(75	)	1,911
Balance as of December 31, 2016	6,130		92,945		557,317		41,643		2,467		43,993		744,495
Accumulated depreciation and impairments
Balance as of December 31, 2015	609		57,146		404,552		56,285		2,027		—		520,619
Depreciation	—		4,209		22,802		2,235		156		—		29,402
Impairments	—		—		4,024		133		32		86		4,275
Impairment reversals	—		—		(1,031	)	—		—		—		(1,031	)
Disposals	—		(529	)	(19,927	)	(23,408	)	(345	)	—		(44,209	)
Foreign exchange and other	—		246		1,504		215		(4	)	—		1,961
Balance as of December 31, 2016	609		61,072		411,924		35,460		1,866		86		511,017
Net carrying amount as of December 31, 2016	5,521		31,873		145,393		6,183		601		43,907		233,478

The following table outlines the changes to property, plant and equipment during the year ended December 31, 2017:

	Land		Buildings		Manufacturing equipment		Computer equipment and software		Furniture, office equipment and other		Construction in progress		Total
	$		$		$		$		$		$		$
Gross carrying amount
Balance as of December 31, 2016	6,130		92,945		557,317		41,643		2,467		43,993		744,495
Additions – separately acquired	—		—		—		—		—		82,510		82,510
Additions through business acquisitions	1,268		6,617		17,427		407		55		1,501		27,275
Assets placed into service	4,638		25,353		59,125		1,415		236		(90,767	)	—
Disposals	(229	)	(116	)	(15,260	)	(1,139	)	(140	)			(16,884	)
Foreign exchange and other	303		2,274		8,791		176		87		598		12,229
Balance as of December 31, 2017	12,110		127,073		627,400		42,502		2,705		37,835		849,625
Accumulated depreciation and impairments
Balance as of December 31, 2016	609		61,072		411,924		35,460		1,866		86		511,017
Depreciation	—		4,341		25,717		2,172		179		—		32,409
Impairments	—		—		208		—		2		274		484
Impairment reversals	—		—		(3	)	—		—		—		(3	)
Disposals	—		(82	)	(14,501	)	(1,138	)	(13	)	—		(15,734	)
Foreign exchange and other	—		963		6,823		158		74		(86	)	7,932
Balance as of December 31, 2017	609		66,294		430,168		36,652		2,108		274		536,105
Net carrying amount as of December 31, 2017	11,501		60,779		197,232		5,850		597		37,561		313,520

Schedule of supplemental information regarding property, plant and equipment

Supplemental information regarding property, plant and equipment is as follows for the years ended:

	December 31, 2017		December 31, 2016
Interest capitalized to property, plant and equipment	$1,378		$817
Weighted average capitalization rates	3.02	%	2.64	%