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Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in the Carrying Value of Goodwill | The changes in the carrying value of goodwill were as follows (in thousands):
|  | Amount
Balance as of December 31, 2014 |  | $ | 77,388 |
Acquisition of Manatee Works, Inc. |  | 4,060 |
Balance as of December 31, 2015 |  | 81,448 |
Acquisition of AQSense, S.L. |  | 1,383 |
Acquisition of EnShape GmbH |  | 8,613 |
Acquisition of Chiaro Technologies LLC |  | 2,911 |
Acquisition of Webscan, Inc. |  | 925 |
Balance as of December 31, 2016 |  | $ | 95,280 |

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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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