Property, Plant and Equipment

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

17.  Property, plant and equipment

As at December 31, 2018		Cost		Accumulated depreciation		Net book value
Land and improvements	$	362,781	$	(72,547)	$	290,234
Buildings		252,182		(106,959)		145,223
Yard and automotive equipment		57,983		(36,640)		21,343
Computer software and equipment		70,623		(60,258)		10,365
Office equipment		28,490		(19,582)		8,908
Leasehold improvements		19,735		(16,240)		3,495
Assets under development		7,031		-		7,031
	$	798,825	$	(312,226)	$	486,599

As at December 31, 2017		Cost		Accumulated depreciation		Net book value
Land and improvements	$	379,546	$	(68,706)	$	310,840
Buildings		267,334		(103,544)		163,790
Yard and automotive equipment		58,209		(38,126)		20,083
Computer software and equipment		69,718		(60,451)		9,267
Office equipment		25,430		(18,745)		6,685
Leasehold improvements		21,467		(15,090)		6,377
Assets under development		9,539		-		9,539
	$	831,243	$	(304,662)	$	526,581

During the year ended December 31, 2018, interest of $110,000 (2017: $110,000; 2016: $95,000) was capitalized to the cost of assets under development. These interest costs relating to qualifying assets are capitalized at a weighted average rate of 4.06% (2017:  2.97%; 2016: 3.99%).

Additions during the year include $8,968,000 (2017: $8,820,000; 2016: $3,376,000) of property, plant and equipment under capital leases.