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INTANGIBLE ASSETS, NET
 12 Months Ended
Dec. 31, 2017
Disclosure of detailed information about intangible assets [abstract]  
INTANGIBLE ASSETS, NET
 
Year ended December 31, 2017
 
Information
system
projects
 
Mining
assets
 
Exploration
and
evaluation
costs
 
Customer
relationships
and other
contractual
rights
 
Trademarks
 
Goodwill
 
Total
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Values at the beginning of the year
 
 
 
 
 
 
 
 
 
 
 
 
 
Cost
215,662

 
202,931

 
5,689

 
298,475

 
73,665

 
662,307

 
1,458,729

Accumulated depreciation
(164,203
)
 
(106,424
)
 
—

 
(272,923
)
 
(72,622
)
 
—

 
(616,172
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net book value at January 1, 2017
51,459

 
96,507

 
5,689

 
25,552

 
1,043

 
662,307

 
842,557

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Opening net book value
51,459

 
96,507

 
5,689

 
25,552

 
1,043

 
662,307

 
842,557

Translation differences
(1,730
)
 
—

 
—

 
—

 
—

 
—

 
(1,730
)
Acquisition of business (note 3)
2,731

 
—

 
—

 
314,177

 
—

 
—

 
316,908

Additions
35,867

 
8,076

 
9,829

 
—

 
—

 
—

 
53,772

Disposals / Consumptions
(32
)
 
—

 
—

 
—

 
—

 
—

 
(32
)
Transfers
(512
)
 
5,185

 
(5,185
)
 
(4,845
)
 
—

 
—

 
(5,357
)
Depreciation charge
(26,874
)
 
(15,431
)
 
—

 
(70,191
)
 
(1,043
)
 
—

 
(113,539
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Closing net book value
60,909

 
94,337

 
10,333

 
264,693

 
—

 
662,307

 
1,092,579

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Values at the end of the year
 
 
 
 
 
 
 
 
 
 
 
 
 
Cost
249,379

 
216,196

 
10,333

 
604,931

 
73,935

 
662,307

 
1,817,081

Accumulated depreciation
(188,470
)
 
(121,859
)
 
—

 
(340,238
)
 
(73,935
)
 
—

 
(724,502
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net book value at December 31, 2017
60,909

 
94,337

 
10,333

 
264,693

 
—

 
662,307

 
1,092,579

 
Year ended December 31, 2016
 
Information
system
projects
 
Mining
assets
 
Exploration
and
evaluation
costs
 
Customer
relationships
and other
contractual
rights
 
Trademarks
 
Goodwill
 
Total
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Values at the beginning of the year
 
 
 
 
 
 
 
 
 
 
 
 
 
Cost
201,815

 
188,813

 
5,294

 
298,475

 
73,665

 
662,307

 
1,430,369

Accumulated depreciation
(135,072
)
 
(92,557
)
 
—

 
(243,312
)
 
(71,222
)
 
—

 
(542,163
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net book value at January 1, 2016
66,743

 
96,256

 
5,294

 
55,163

 
2,443

 
662,307

 
888,206

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Opening net book value
66,743

 
96,256

 
5,294

 
55,163

 
2,443

 
662,307

 
888,206

Translation differences
(1,216
)
 
—

 
—

 
—

 
—

 
—

 
(1,216
)
Additions
19,775

 
14,118

 
398

 
—

 
—

 
—

 
34,291

Disposals/Consumptions
(69
)
 
—

 
(3
)
 
—

 
—

 
—

 
(72
)
Depreciation charge
(33,774
)
 
(13,867
)
 
—

 
(29,611
)
 
(1,400
)
 
—

 
(78,652
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Closing net book value
51,459

 
96,507

 
5,689

 
25,552

 
1,043

 
662,307

 
842,557

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Values at the end of the year
 
 
 
 
 
 
 
 
 
 
 
 
 
Cost
215,662

 
202,931

 
5,689

 
298,475

 
73,665

 
662,307

 
1,458,729

Accumulated depreciation
(164,203
)
 
(106,424
)
 
—

 
(272,923
)
 
(72,622
)
 
—

 
(616,172
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net book value at December 31, 2016
51,459

 
96,507

 
5,689

 
25,552

 
1,043

 
662,307

 
842,557