Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments And Contingencies [Abstract]

Schedule of minimum estimated commitment under purchase contracts

The minimum estimated commitment under these contracts, except as noted below, is as follows:

As at December 31, 2018



2019		2020		2021		2022		2023		Thereafter
$	456,804	$	369,401	$	371,345	$	340,595	$	319,509	$	1,502,356

Schedule of minimum lease payments

Finance lease obligations are payable as follows:



	Lease payments		Interest component		Finance lease obligations
2019	$	32,222	$	22,990	$	9,232
2020	32,614		22,001		10,613
2021	33,014		20,837		12,177
2022	33,422		19,473		13,949
2023	32,779		17,915		14,864
Thereafter	206,223		68,684		137,539
	$	370,274	$	171,900	$	198,374

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, 2018



2019		2020		2021		2022		2023		Thereafter
$	79,692	$	70,896	$	49,325	$	47,749	$	55,147	$	124,480