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Goodwill (Tables) | 6 Months Ended
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Jun. 30, 2018
Changes to Carrying Amount of Goodwill | The changes to the carrying amount of goodwill as of June 30, 2018 are summarized as follows (in thousands):
|  | Total |
Balance, December 31, 2017 |  | $ | 35,384 |
Adjustments to goodwill for foreign currency translation |  |  | (116 | )
Balance, June 30, 2018 |  | $ | 35,268 |

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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
Name: | us-gaap_ScheduleOfGoodwillTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration