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Acquisitions (Narrative) (Details) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jan. 31, 2017 USD ($) | Dec. 31, 2019 business | Dec. 31, 2018 business
Business Acquisition [Line Items] |  |  |
Number of businesses acquired | business |  | 0 | 0
Vertex-Global Holding B.V. |  |  |
Business Acquisition [Line Items] |  |  |
Acquired ownership percentage | 100.00% |  |
Value of voting rights acquired | $ | $ 37,562 |  |

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