PROPERTY, PLANT AND EQUIPMENT

The following table outlines the changes to property, plant and equipment during the year ended December 31, 2016:



	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

Capital expenditures incurred in the year ended December 31, 2017 were primarily to support the construction of the Midland, North Carolina manufacturing facility, the construction of the greenfield manufacturing facilities related to Capstone and Powerband, the capacity expansion of stretch film production at the Danville, Virginia manufacturing facility and other growth initiatives and maintenance needs. As of December 31, 2017, the Company had commitments to suppliers to purchase machinery and equipment totalling $29.3 million primarily to support the construction of the greenfield manufacturing facilities related to Powerband and Capstone, shrink film capacity expansion at the Tremonton, Utah manufacturing facility, capacity expansion at the Midland, North Carolina manufacturing facility and other growth initiatives. It is expected that such amounts will be paid out in the next twelve months and will be funded by the Revolving Credit Facility and cash flows from operating activities.

Capital expenditures incurred in the year ended December 31, 2016 were primarily related to the construction of the Midland, North Carolina manufacturing facility, shrink film capacity expansion at the Portugal manufacturing facility, and other growth initiatives and maintenance needs. As of December 31, 2016, the Company had commitments to suppliers to purchase machinery and equipment totalling $32.4 million primarily to support these initiatives.

During the year ended December 31, 2017, the loss on disposals amounted to $0.3 million ($0.1 million loss on disposals in 2016 and $0.8 million gain on disposals in 2015).

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	%