Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2017

Debt Disclosure [Abstract]

Summary of Long-Term Debt

	As at		As at
	June 30, 2017		December 31, 2016
	$		$
Revolving Credit Facilities due through 2021	410,926		466,195
Term Loans due through 2021	417,930		475,466
Total principal	828,856		941,661
Less: unamortized discount and debt issuance costs	(7,070	)	(8,645	)
Total debt	821,786		933,016
Less: current portion	(150,254	)	(171,019	)
Non-current portion of long-term debt	671,532		761,997