Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Taxes [Abstract]

Schedule of Effective Income Tax Rate Reconciliation

Year ended December 31,		2017		2016		2015
Income before income taxes	$	77,394	$	130,494	$	176,436
Statutory federal and provincial tax
rate in Canada		26.00%		26.00%		26.00%
Expected income tax expense	$	20,122	$	33,928	$	45,873
Impairment of goodwill		-		6,129		-
Non-deductible expenses		5,668		3,891		2,579
Non-taxable income		(105)		(624)		-
Sale of capital property		-		-		(1,291)
Changes in the valuation of deferred tax assets		(1,089)		(259)		(5,828)
Different tax rates of subsidiaries
operating in foreign jurisdictions		(12,269)		(3,786)		(3,426)
Change in enacted rates		(10,299)		51		307
Change in estimate of deductibility
of stock options		(1,557)		-		-
Unrecognized tax benefits		3,291		799		1,362
Benefits of deductible stock options vested
and exercised		(1,359)		(1,042)		(666)
Deductions for tax purposes in excess of
accounting expenses		(380)		(490)		(232)
Other		65		(1,615)		(817)
	$	2,088	$	36,982	$	37,861

Summary of Income Tax Expense (Recovery)

Year ended December 31,		2017			2016		2015
Canadian:
Current tax expense	$	14,245	30,525	$	30,525	$	27,623
Deferred tax expense		(10,192)			(2,068)		1,880
Foreign:
Current tax expense before application
of operating loss carryforwards		8,987			12,126		16,707
Tax benefit of operating loss carryforwards		(3,876)			(2,310)		(1,910)
Total foreign current tax expense		5,111			9,816		14,797
Deferred tax expense before adjustment
to opening valuation allowance		(6,317)			(1,291)		(273)
Adjustment to opening valuation allowance		(759)			-		(6,166)
Total foreign deferred tax expense		(7,076)			(1,291)		(6,439)
	$	2,088		$	36,982	$	37,861

Schedule of Deferred Tax Assets and Liabilities

As at December 31,		2017			2016
Deferred tax assets:
Working capital	$	9,583		$	3,991
Property, plant and equipment		6,495			5,475
Goodwill		1,016			341
Share-based compensation		5,733			3,154
Unused tax losses		50,967			17,790
Other		8,919			8,251
		82,713	-		39,002
Deferred tax liabilities:
Property, plant and equipment	$	(9,779)		$	(10,019)
Goodwill		(9,202)			(12,976)
Intangible assets		(54,401)			(11,062)
Other		(8,628)			(2,565)
		(82,010)			(36,622)
Net deferred tax assets	$	703		$	2,380
Valuation allowance		(14,363)			(10,411)
	$	(13,660)		$	(8,031)

Reclassification of Deferred Tax Assets and Liabilities

		December 31,
		2016
Deferred tax assets
As reported	$	19,129
Reclassified to Other non-current assets (note 19)		(10,035)
Current presentation		9,094
Deferred tax liabilities
As reported	$	36,387
Reclassified to Other non-current liabilities (note 26)		(19,262)
Current presentation		17,125
Net deferred tax assets (liabilities)
As reported	$	(17,258)
Net reclassification detailed above		9,227
Current presentation		(8,031)

Schedule of Non-capital Loss Carryforwards

2018	$	510
2019		148
2020		6,267
2021		5,125
2022 and thereafter		199,986
	$	212,036

Schedule of Unrecognized Tax Benefits

As at December 31,		2017		2016
Unrecognized tax benefits, beginning of year	$	19,262	$	15,904
Increases - tax positions taken in prior period		4,426		846
Decreases - tax positions taken in prior period		(124)		-
Increases - tax positions taken in current period		2,346		2,785
Settlement and lapse of statute of limitations		-		(273)
Unrecognized tax benefits, end of year	$	25,910	$	19,262