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Income and Mining Taxes (Tables)
12 Months Ended
Dec. 31, 2015
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit)
The components of the consolidated Income and mining tax (expense) benefit from continuing operations are below:
 
Year ended December 31,
In thousands
2015
 
2014
 
2013
Current:
 

 
 

 
 

United States
$
49

 
$
904

 
$
4

United States — State mining taxes
(4,305
)
 
(879
)
 
(714
)
United States — Foreign withholding tax

 
(6,250
)
 
397

Argentina
715

 
(71
)
 
(137
)
Australia
130

 

 
(914
)
Mexico
(476
)
 
(10,122
)
 
(9,046
)
Bolivia
(5,154
)
 
(4,008
)
 
(6,716
)
Canada
(516
)
 
(145
)
 
(1,936
)
Deferred:
 
 
 
 
 
Argentina
(1,197
)
 
24,478

 
8,062

Australia
3,223

 
(401
)
 
(2
)
Bolivia

 
22,122

 
(4,222
)
Canada
2,875

 
2,662

 

Mexico
27,189

 
394,221

 
94,851

United States
1,778

 
5,743

 
78,489

United States — State mining taxes
1,952

 

 

Income tax (expense) benefit
$
26,263

 
$
428,254

 
$
158,116

The components of Income (loss) before income taxes are below:
 
Year ended December 31,
In thousands
2015
 
2014
 
2013
United States
$
(43,924
)
 
$
(213,883
)
 
$
(242,562
)
Foreign
(349,522
)
 
(1,401,245
)
 
(566,117
)
Total
$
(393,446
)
 
$
(1,615,128
)
 
$
(808,679
)
Schedule of Effective Income Tax Rate Reconciliation
A reconciliation of the Company’s effective tax rate with the federal statutory tax rate for the periods indicated is below:
 
Year ended December 31,
In thousands
2015
 
2014
 
2013
Income and mining tax benefit (expense) at statutory rate
$
137,706

 
$
565,295

 
$
283,038

State tax provision from continuing operations
(2,075
)
 
20,253

 
2,245

Change in valuation allowance
(101,027
)
 
(151,191
)
 
(106,802
)
Non-deductible imputed interest

 

 
(214
)
Uncertain tax positions
(1,947
)
 
(4,425
)
 
(5,209
)
U.S. and foreign non-deductible expenses
1,365

 
(4,892
)
 
(2,383
)
Mineral interest related
(19,310
)
 

 

Foreign exchange rates
22,350

 
23,672

 
13,937

Foreign inflation and indexing
1,117

 
3,765

 
2,937

Foreign tax rate differences
(15,980
)
 
(63,930
)
 
(24,108
)
Foreign withholding and other taxes
8,140

 
82,884

 
(100,331
)
Foreign tax credits and other, net
(4,076
)
 
(43,177
)
 
13,153

Mexico permanent reinvestment assertion

 

 
81,853

Income and mining tax benefit (expense)
$
26,263

 
$
428,254

 
$
158,116

Schedule of Deferred Tax Assets and Liabilities
At December 31, 2015 and 2014, the significant components of the Company’s deferred tax assets and liabilities are below:
 
Year ended December 31,
In thousands
2015
 
2014
Deferred tax liabilities:
 

 
 

Mexican mining tax
$
15,451

 
$
8,065

Foreign subsidiaries — unremitted earnings
12,999

 
45,249

Inventory
2,353

 
3,135

Royalty and other long-term debt
1,648

 

 
$
32,451

 
$
56,449

Deferred tax assets:
 

 
 

Net operating loss carryforwards
203,958

 
153,701

Mineral properties
34,966

 
46,006

Property, plant, and equipment
6,980

 
38,091

Royalty and other long-term debt

 
5,863

Capital loss carryforwards
3,938

 
35,251

Asset retirement obligation
21,480

 
21,586

Unrealized foreign currency loss and other
8,424

 
8,213

Accrued expenses
17,905

 
9,365

Tax credit carryforwards
26,439

 
56,322

 
324,090

 
374,398

Valuation allowance
(436,829
)
 
(391,510
)
 
(112,739
)
 
(17,112
)
Net deferred tax liabilities
$
145,190

 
$
73,561

Summary of Valuation Allowance
Based upon this analysis, the Company has recorded valuation allowances as follows:
 
Year ended December 31,
In thousands
2015
 
2014
U.S. 
$
292,677

 
$
305,534

Argentina
8,376

 
21,520

Canada
1,718

 
2,009

Bolivia
45,177

 
15,948

Mexico
63,373

 
14,816

New Zealand
25,508

 
28,710

Other

 
2,973

 
$
436,829

 
$
391,510

Summary of Tax Credit Carryforwards
The Company has the following tax attribute carryforwards at December 31, 2015, by jurisdiction:
In thousands
U.S.
 
Argentina
 
Bolivia
 
Canada
 
Mexico
 
New Zealand
 
Other
 
Total
Regular net operating losses
320,511

 
12,210

 
55,019

 
2,182

 
108,191

 
91,096

 
68

 
589,277

Alternative minimum tax net operating losses
187,376

 

 

 

 

 

 

 
187,376

Capital losses
11,195

 

 

 

 

 

 

 
11,195

Alternative minimum tax credits
3,173

 

 

 

 

 

 

 
3,173

Foreign tax credits
19,898

 

 

 

 

 

 

 
19,898

Summary of Income Tax Contingencies
A reconciliation of the beginning and ending amount related to unrecognized tax benefits is below (in thousands):
Unrecognized tax benefits at January 1, 2014
$
15,471

Gross increase to current period tax positions
1,856

Gross increase to prior period tax positions
524

Reductions in unrecognized tax benefits resulting from a lapse of the applicable statute of limitations
(1,767
)
Unrecognized tax benefits at December 31, 2014
$
16,084

Gross increase to current period tax positions
1,030

Gross increase to prior period tax positions
810

Reductions in unrecognized tax benefits resulting from a lapse of the applicable statute of limitations

Unrecognized tax benefits at December 31, 2015
$
17,924