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 |