Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Summary of Long-Term Debt

	December 31, 2018 $		December 31, 2017 $
Revolving Credit Facilities	642,997		877,343
Senior Notes (8.5%) due January 15, 2020	508,577		592,657
Convertible Senior Notes (5%) due January 15, 2023	125,000		—
Norwegian Kroner-denominated Bonds due through August 2023	352,973		377,856
U.S. Dollar-denominated Term Loans due through 2030	1,536,499		1,358,798
Euro-denominated Term Loans due through 2024	193,781		232,957
Other U.S. Dollar-denominated loan	3,300		10,000
Total principal	3,363,127		3,449,611
Less unamortized discount and debt issuance costs	(43,604	)	(31,906	)
Total debt	3,319,523		3,417,705
Less current portion	(242,137	)	(800,897	)
Long-term portion	3,077,386		2,616,808