Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Summary of Long-Term Debt

Long-Term Debt

	June 30, 2018		December 31, 2017
	$		$
Revolving Credit Facilities	679,141		877,343
Senior Notes (8.5%) due January 15, 2020	585,841		592,657
Convertible Senior Notes (5%) due January 15, 2023	125,000		—
Norwegian Kroner-denominated Bonds due through October 2021	380,491		377,856
U.S. Dollar-denominated Term Loans due through 2031	1,410,348		1,358,798
Euro-denominated Term Loans due through 2023	217,621		232,957
Other U.S. Dollar-denominated loan	—		10,000
Total principal	3,398,442		3,449,611
Less unamortized discount and debt issuance costs	(49,109	)	(31,906	)
Total debt	3,349,333		3,417,705
Less current portion	(527,467	)	(800,897	)
Long-term portion	2,821,866		2,616,808