Income Tax Expense (Recovery) (Tables)

9 Months Ended

Sep. 30, 2019

Income Tax Disclosure [Abstract]

Components of Provision for Income Tax (Expense) Recovery

The components of the provision for income tax expense are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
	$		$		$		$
Current	(2,911	)	(4,122	)	(10,983	)	(15,343	)
Deferred	(180	)	(212	)	(548	)	(1,854	)
Income tax expense	(3,091	)	(4,334	)	(11,531	)	(17,197	)

Unrecognized Tax Benefits, Recorded in Other Long-Term Liabilities

	Nine Months Ended September 30,
	2019	2018
	$	$
Balance of unrecognized tax benefits as at January 1	40,556	31,061
Increases for positions related to the current year	3,213	2,908
Changes for positions taken in prior periods	3,066	2,161
Decrease related to statute limitations	—	(405	)
Balance of unrecognized tax benefits as at September 30	46,835	35,725