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Goodwill | 12 Months Ended
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Dec. 31, 2020
Goodwill |
Goodwill | Note 7 – Goodwill Goodwill activity for the two years ended December 31, 2020 consisted of the following: ​
​ | ​ | ​ | ​
in thousands | ​ | ​ | ​
Net balance at December 31, 2018 |  | $ | 91,841
Adjustment to provisional estimate of acquisition date fair values | ​ |  | 1,128
Net foreign currency translation | ​ |  | 1,643
Net balance at December 31, 2019 |  | $ | 94,612
Net foreign currency translation | ​ |  | 2,940
Net balance at December 31, 2020 | ​ | $ | 97,552
​ Certain portions of goodwill are denominated in local currencies and are subject to currency fluctuations. No impairment of goodwill was recorded during the years ended December 31, 2020, 2019, or 2018.

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- Definition The entire disclosure for goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2144439 + Details
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