| Thousands of U.S. dollars | |||||||||||||
| Balance at December 31, 2015 | Additions | Acquisitions from business combination | Disposals | Transfers | Translation differences | Balance at December 31, 2016 | |||||||
| Cost | |||||||||||||
| Development | 2,422 | 1,231 | - | (52) | - | 306 | 3,907 | ||||||
| Customer base | 254,110 | - | 2,522 | - | - | 7,525 | 264,157 | ||||||
| Software | 90,278 | 8,140 | 105 | (7,546) | - | 47,073 | 138,050 | ||||||
| Other intangible assets | 39,492 | 980 | 1 | (2,422) | - | 6,788 | 44,839 | ||||||
| Work in progress | 1,198 | 2,693 | - | (6) | - | (1,062) | 2,823 | ||||||
| Total cost | 387,500 | 13,044 | 2,628 | (10,026) | - | 60,630 | 453,776 | ||||||
| Accumulated amortization | |||||||||||||
| Development | (282) | (241) | - | 33 | - | 15 | (475) | ||||||
| Customer base | (77,443) | (24,175) | - | - | (872) | (2,806) | (105,296) | ||||||
| Software | (36,637) | (21,953) | - | 6,716 | - | (16,264) | (68,138) | ||||||
| Other intangible assets | (24,665) | (4,547) | - | 287 | 872 | (3,754) | (31,807) | ||||||
| Total accumulated amortization | (139,027) | (50,916) | - | 7,036 | - | (22,809) | (205,716) | ||||||
| Impairment | (22,213) | - | - | - | - | 706 | (21,507) | ||||||
| Net intangible assets | 226,260 | (37,872) | 2,628 | (2,990) | - | 38,527 | 226,553 | ||||||