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Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in the Carrying Amount of Goodwill by Geographic Reporting Unit | The following are the changes in the carrying amount of goodwill by geographic reporting unit:
(in thousands) |  | Americas |  | EMEA |  | Asia Pacific |  | Total
Balance at December 31, 2016 |  | $ | — |  |  | $ | 144,971 |  |  | $ | 36,259 |  |  | $ | 181,230 |
Acquisitions and adjustments |  | — |  |  | 31,438 |  |  | 41 |  |  | 31,479 |
Effect of foreign currency exchange rates |  | — |  |  | 15,539 |  |  | 2,634 |  |  | 18,173 |
Balance at December 31, 2017 |  | — |  |  | 191,948 |  |  | 38,934 |  |  | 230,882 |
Acquisitions and adjustments |  | — |  |  | (331 | ) |  | — |  |  | (331 | )
Effect of foreign currency exchange rates |  | — |  |  | (7,597 | ) |  | (1,620 | ) |  | (9,217 | )
Balance at December 31, 2018 |  | $ | — |  |  | $ | 184,020 |  |  | $ | 37,314 |  |  | $ | 221,334 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 + Details
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