Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Summary of Long-Term Debt

	As at		As at
	September 30, 2017		December 31, 2016
	$		$
Revolving Credit Facilities due through 2021	321,330		466,195
Term Loans due through 2021	330,903		475,466
Total principal	652,233		941,661
Less: unamortized discount and debt issuance costs	(6,328	)	(8,645	)
Total debt	645,905		933,016
Less: current portion	(159,087	)	(171,019	)
Non-current portion of long-term debt	486,818		761,997