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Goodwill and intangibles (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of changes in goodwill | The following table shows the adjustments to goodwill during 2017 and 2016:
Balance at December 31, 2015, as restated | $ | 149,928 |
Acquisitions | 81,016 |
Divestitures | — |
Reclassifications, adjustments and other | (3,033 | )
Translation adjustments | (3,260 | )
Balance at December 31, 2016, as restated | $ | 224,651 |
Acquisitions | — |
Divestitures | (1,854 | )
Reclassifications, adjustments and other | 181 |
Translation adjustments | 14,325 |
Balance at December 31, 2017 | $ | 237,303 |
Schedule of composition of intangible assets | The unamortized software development costs and amortization expense were as follows:
| Year ended December 31,
| 2017 |  | 2016 |  | 2015
|  |  | (Restated) |  | (Restated)
Unamortized software development costs | $ | 11,695 |  |  | $ | 5,754 |  |  | $ | 4,390 |
Software development amortization expense | 3,178 |  |  | 3,507 |  |  | 55 |
The Company’s intangible assets consist of the following:
| December 31, 2017
| Cost |  | Accumulated Amortization |  | Net
Technology | $ | 124,799 |  |  | $ | (70,608 | ) |  | $ | 54,191 |
Customer lists and relationships | 128,170 |  |  | (62,905 | ) |  | 65,265 |
Capitalized software and patents | 19,792 |  |  | (7,115 | ) |  | 12,677 |
Trade name | 2,559 |  |  | (2,525 | ) |  | 34 |
| $ | 275,320 |  |  | $ | (143,153 | ) |  | $ | 132,167 |
| December 31, 2016
| (Restated)
| Cost |  | Accumulated Amortization |  | Net
Technology | $ | 129,382 |  |  | $ | (53,142 | ) |  | $ | 76,240 |
Customer lists and relationships | 129,650 |  |  | (49,852 | ) |  | 79,798 |
Capitalized software and patents | 10,589 |  |  | (3,923 | ) |  | 6,666 |
Trade name | 2,523 |  |  | (2,259 | ) |  | 264 |
| $ | 272,144 |  |  | $ | (109,176 | ) |  | $ | 162,968 |
Schedule of estimated annual amortization expense of intangible assets for the next five years | Estimated future amortization expense of its intangible assets for the next five years is as follows:
Year ending December 31, |
2018 | $ | 39,218 |
2019 | 31,993 |
2020 | 20,561 |
2021 | 12,157 |
2022 | 10,601 |
Thereafter | 17,637 |
Total | 132,167 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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