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Income Taxes (Tables)
12 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]  
Schedule of Income before Income Tax, Domestic and Foreign
The following is a geographical breakdown of income before the provision for income taxes:
 
Year Ended June 30,
 
2019
 
2018
 
2017
Domestic income (loss)
$
269,331

 
$
238,405

 
$
110,562

Foreign income
171,243

 
147,721

 
138,989

Income before income taxes
$
440,574

 
$
386,126

 
$
249,551


Schedule of Components of Income Tax Expense (Benefit)
The provision for (recovery of) income taxes consisted of the following:
 
Year Ended June 30,
 
2019
 
2018
 
2017
Current income taxes (recoveries):
 
 
 
 
 
Domestic
$
7,862

 
$
5,313

 
$
12,238

Foreign
99,650

 
48,777

 
82,593

 
107,512

 
54,090

 
94,831

Deferred income taxes (recoveries):
 

 
 

 
 

Domestic
52,889

 
61,678

 
(851,683
)
Foreign
(5,464
)
 
28,058

 
(19,512
)
 
47,425

 
89,736

 
(871,195
)
Provision for (recovery of) income taxes
$
154,937

 
$
143,826

 
$
(776,364
)

Schedule of Effective Income Tax Rate Reconciliation
A reconciliation of the combined Canadian federal and provincial income tax rate with our effective income tax rate is as follows:
 
Year Ended June 30,
 
2019
 
2018
 
2017
Expected statutory rate
26.5
%
 
26.5
%
 
26.5
%
Expected provision for income taxes
$
116,752

 
$
102,323

 
$
66,131

Effect of foreign tax rate differences
(1,344
)
 
2,352

 
8,647

Change in valuation allowance
(5,045
)
 
1,779

 
520

Amortization of deferred charges

 
4,242

 
6,298

Effect of permanent differences
(577
)
 
4,332

 
3,673

Effect of changes in unrecognized tax benefits
31,992

 
5,543

 
14,427

Effect of withholding taxes
2,097

 
7,927

 
3,845

Difference in tax filings from provision
(250
)
 
1,321

 
(7,836
)
Effect of U.S. tax reform

 
19,037

 

Effect of tax credits for research and development
(13,550
)
 
(3,875
)
 
(2,643
)
Effect of accrual for undistributed earnings
(13,112
)
 
(1,154
)
 
5,613

Effect of Base Erosion and Anti-Abuse Tax (BEAT)
16,030

 

 

Other Items
5,473

 
(1
)
 
1,075

Impact of internal reorganization of subsidiaries
16,471

 

 
(876,114
)
 
$
154,937

 
$
143,826

 
$
(776,364
)

Schedule of Deferred Tax Assets and Liabilities
The primary components of the deferred tax assets and liabilities are as follows, for the periods indicated below:
 
June 30,
 
2019
 
2018
Deferred tax assets
 
 
 
Non-capital loss carryforwards
$
161,119

 
$
129,436

Capital loss carryforwards
155

 
417

Undeducted scientific research and development expenses
137,253

 
123,114

Depreciation and amortization
683,777

 
829,369

Restructuring costs and other reserves
17,845

 
17,202

Deferred revenue
53,254

 
62,726

Other
59,584

 
57,461

Total deferred tax asset
$
1,112,987

 
$
1,219,725

Valuation Allowance
$
(77,328
)
 
$
(80,924
)
Deferred tax liabilities
 
 
 
Scientific research and development tax credits
$
(14,482
)
 
$
(13,342
)
Other
(72,599
)
 
(82,668
)
Deferred tax liabilities
$
(87,081
)
 
$
(96,010
)
Net deferred tax asset
$
948,578

 
$
1,042,791

Comprised of:
 
 
 
Long-term assets
1,004,450

 
1,122,729

Long-term liabilities
(55,872
)
 
(79,938
)
 
$
948,578

 
$
1,042,791


Summary of Income Tax Contingencies
The aggregate changes in the balance of our gross unrecognized tax benefits (including interest and penalties) were as follows:
Unrecognized tax benefits as of July 1, 2017
$
174,530

Increases on account of current year positions
6,483

Increases on account of prior year positions
17,794

Decreases due to settlements with tax authorities

Decreases due to lapses of statutes of limitations
(20,995
)
Unrecognized tax benefits as of June 30, 2018
$
177,812

Increases on account of current year positions
25,642

Increases on account of prior year positions
15,024

Decreases due to settlements with tax authorities

Decreases due to lapses of statutes of limitations
(9,236
)
Unrecognized tax benefits as of June 30, 2019
$
209,242


Interest and Penalties Related to Liabilities for Income Tax Expense
We recognize interest expense and penalties related to income tax matters in income tax expense. For the year ended June 30, 2019, 2018 and 2017, we recognized the following amounts as income tax-related interest expense and penalties:
 
Year Ended June 30,
 
2019
 
2018
 
2017
Interest expense
$
10,512

 
$
6,233

 
$
13,028

Penalties expense (recoveries)
945

 
(191
)
 
438

Total
$
11,457

 
$
6,042

 
$
13,466


Interest Accrued and Penalties Accrued Related to Income Tax Expense
The following amounts have been accrued on account of income tax-related interest expense and penalties:
 
As of June 30, 2019
 
As of June 30, 2018
Interest expense accrued *
$
64,530

 
$
54,058

Penalties accrued *
$
2,525

 
$
2,438

* These balances have been included within "Long-term income taxes payable" within the Consolidated Balance Sheets.