Other long-term liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Subclassifications of assets, liabilities and equities [abstract]



As at	Dec 31 2017			Dec 31 2016
Site restoration costs^(a)	$	33,975		$	30,512
Finance lease obligations^(b)	204,242			201,268
Share-based compensation liability (note 13)	111,405			53,725
Cash flow hedges (note 18)	90,199			68,664
Defined benefit pension plans (note 20)	25,076			22,403
Other	5,214			4,339
	470,111			380,911
Less current maturities	(65,226		)	(29,720		)
	$	404,885		$	351,191

Provision for site restoration costs

The movement in the provision during the year is explained as follows:



	2017		2016
Balance at January 1	$	30,512	$	29,892
New or revised provisions	2,823		51
Accretion expense	640		569
Balance at December 31	$	33,975	$	30,512

Finance lease obligations payable

Finance lease obligations are payable as follows:



	Lease payments		Interest component		Finance lease obligations
2018	$	31,447	$	23,549	$	7,898
2019	31,826		22,727		9,099
2020	32,213		21,756		10,457
2021	32,608		20,612		11,996
2022	33,010		19,271		13,739
Thereafter	236,772		85,719		151,053
	$	397,876	$	193,634	$	204,242

The Company has future minimum lease payments under operating leases relating primarily to vessel charter, terminal facilities, office space, equipment and other operating lease commitments as follows:

As at December 31, 2017



2018		2019		2020		2021		2022		Thereafter
$	90,820	$	90,035	$	56,973	$	38,982	$	37,858	$	163,822