Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt [Abstract]

Schedule of Debt

			Carrying amount
As at December 31,				2018		2017
Short-term debt			$	19,896	$	7,018
Long-term debt:
	Term loans (previously referred to as Delayed draw term loans):
		Denominated in Canadian dollars, secured, bearing interest at a weighted
		average rate of 4.339%, due in monthly installments of interest only and
		quarterly installments of principal, maturing in October 2021		161,891		185,143
		Denominated in United States dollars, secured, bearing interest at a weighted
		average rate of 4.497%, due in weekly installments of interest only and
		quarterly installments of principal, maturing in October 2021		62,690		144,544
		Less: unamortized debt issue costs		(2,419)		(4,134)
	Senior unsecured notes:
		Bearing interest at 5.375% due in semi-annual installments, with the full
		amount of principal due in January 2025		500,000		500,000
		Less: unamortized debt issue costs		(10,864)		(12,661)
Total long-term debt				711,298		812,892
Total debt			$	731,194	$	819,910
Long-term debt:
Current portion			$	13,126	$	16,907
Non-current portion				698,172		795,985
Total long-term debt			$	711,298	$	812,892

Schedule Of Future Principal Loan Repayments

		Face value
2019		13,126
2020		17,502
2021		193,953
2022		-
2023		-
Thereafter		500,000
	$	724,581