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GOODWILL (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of changes in the carrying amount of goodwill | The changes in the carrying amount of goodwill for the twelve months ended December 31, 2017 and 2016 are as follows:
(in thousands) |
Goodwill at December 31, 2015 | $ | 249,939 |
Goodwill acquired | 8,613 |
Goodwill adjustments due to currency translation | (2,887 | )
Goodwill at December 31, 2016 | $ | 255,665 |
Goodwill acquired | 87,261 |
Goodwill adjustments due to currency translation | 3,588 |
Goodwill at December 31, 2017 | $ | 346,514 |

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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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