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Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill [Abstract] |
Changes In The Carrying Amount Of Goodwill By Geographic Reporting Unit |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿(in thousands) |  | Americas |  | EMEA |  | Asia Pacific |  | Total
﻿Balance at December 31, 2015 |  | $ | — |  | $ | 150,521 |  | $ | 37,354 |  | $ | 187,875
﻿Acquisitions and adjustments |  |  | — |  |  | (137) |  |  | 189 |  |  | 52
﻿Effect of foreign currency exchange rates |  |  | — |  |  | (5,413) |  |  | (1,284) |  |  | (6,697)
﻿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
﻿

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- Definition Goodwill [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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