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Goodwill and intangible assets (Tables) | 3 Months Ended
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Mar. 31, 2016
Changes in Goodwill | The following table presents the changes in goodwill for the year ended December 31, 2015 and three months ended March 31, 2016:
|  | As of December 31, |  |  | As of March 31, |
|  | 2015 |  |  | 2016 |
Opening balance |  | $ | 1,057,214 |  |  | $ | 1,038,346 |
Goodwill relating to acquisitions consummated during the period |  |  | 7,674 |  |  |  | 14,479 |
Impact of measurement period adjustments |  |  | (135 | ) |  |  | — |
Effect of exchange rate fluctuations |  |  | (26,407 | ) |  |  | 2,912 |
Closing balance |  | $ | 1,038,346 |  |  | $ | 1,055,737 |
Intangible Assets Acquired Either Individually or with Group of Other Assets or in Business Combination | The Company’s intangible assets acquired either individually or with a group of other assets or in a business combination are as follows:
|  | As of December 31, 2015 |  |  | As of March 31, 2016 |
|  | Gross carrying amount |  |  | Accumulated amortization and impairment |  |  | Net |  |  | Gross carrying amount |  |  | Accumulated amortization and impairment |  |  | Net |
Customer-related intangible assets |  | $ | 319,035 |  |  | $ | 247,463 |  |  | $ | 71,572 |  |  | $ | 320,177 |  |  | $ | 252,899 |  |  | $ | 67,278 |
Marketing-related intangible assets |  |  | 42,749 |  |  |  | 27,021 |  |  |  | 15,728 |  |  |  | 42,697 |  |  |  | 27,763 |  |  |  | 14,934 |
Other intangible assets |  |  | 29,729 |  |  |  | 18,427 |  |  |  | 11,301 |  |  |  | 31,137 |  |  |  | 23,701 |  |  |  | 7,436 |
|  | $ | 391,513 |  |  | $ | 292,911 |  |  | $ | 98,601 |  |  | $ | 394,011 |  |  | $ | 304,363 |  |  | $ | 89,648 |

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- Definition The carrying amount of goodwill, goodwill acquired during the year, goodwill impairment losses recognized, goodwill written off due to the sale of a business unit, goodwill not yet allocated, and any other changes to goodwill during the period in total and for each reportable segment. At least annually, an Entity must evaluate its goodwill for impairment. + References No definition available. + Details
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- Definition Tabular disclosure of the characteristics, including initial carrying value, residual amount, weighted average useful life, of finite-lived intangible assets acquired during the period by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by nature or by their use in the operations of the company. + References Reference 1: 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=26713463&loc=d3e16265-109275 + Details
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