Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Summary of Long-Term Debt

	September 30, 2018		December 31, 2017
	$		$
Revolving Credit Facilities	660,763		877,343
Senior Notes (8.5%) due January 15, 2020	540,082		592,657
Convertible Senior Notes (5%) due January 15, 2023	125,000		—
Norwegian Kroner-denominated Bonds due through August 2023	374,040		377,856
U.S. Dollar-denominated Term Loans due through 2031	1,489,245		1,358,798
Euro-denominated Term Loans due through 2024	205,923		232,957
Other U.S. Dollar-denominated loan	3,300		10,000
Total principal	3,398,353		3,449,611
Less unamortized discount and debt issuance costs	(47,338	)	(31,906	)
Total debt	3,351,015		3,417,705
Less current portion	(259,104	)	(800,897	)
Long-term portion	3,091,911		2,616,808