Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Summary of Financing Receivables

The following table contains a summary of the Company’s financing receivables by type and the method by which the Company monitors the credit quality of its financing receivables on a quarterly basis.

Class of Financing Receivable	Credit Quality Indicator	Grade	December 31, 2017 $	December 31, 2016 $
Advances to equity accounted investment	Other internal metrics	Performing	9,930	10,480
			9,930	10,480

Summarizes Change in Capitalized Dry-Docking Activity

The following table summarizes the change in the Company’s capitalized dry-docking costs, from January 1, 2015 to December 31, 2017:

	Year Ended December 31,
	2017 $		2016 $		2015 $
Balance at the beginning of the year	49,298		62,146		35,509
Cost incurred for dry docking	16,239		9,340		39,617
Dry-dock amortization	(17,077	)	(18,736	)	(12,866	)
Vessel sales (note 19)	—		(3,452	)	(114	)
Balance at the end of the year	48,460		49,298		62,146