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Goodwill and Other Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2019
Goodwill And Other Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets and Goodwill [Table Text Block] |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Weighted |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Average |
|  | March 31, 2019 |  |  |  | December 31, 2018 |  | Life | (a)
|  | (in thousands) |  |  |
Amortizable intangible assets: |  | Gross |  |  | Accumulated Amortization |  |  |  | Gross |  |  | Accumulated Amortization |  |  |
Existing technology | $ | 41,285 |  | $ | (17,173) |  |  | $ | 41,268 |  | $ | (16,215) |  | 6.9 | Years
Trade names |  | 7,786 |  |  | (3,007) |  |  |  | 7,828 |  |  | (2,861) |  | 7.5 | Years
Distribution agreements/customer relationships |  | 22,538 |  |  | (9,780) |  |  |  | 22,657 |  |  | (9,509) |  | 10.4 | Years
In-process research and development |  | 1,387 |  |  | (45) |  |  |  | 1,387 |  |  | (30) |  | 7.2 | Years
Patents |  | 218 |  |  | (218) |  |  |  | 211 |  |  | (204) |  | - | Years
Total amortizable intangible assets |  | 73,214 |  | $ | (30,223) |  |  |  | 73,351 |  | $ | (28,819) |  |  |
Indefinite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | 57,375 |  |  |  |  |  |  | 57,304 |  |  |  |  |  |
Other indefinite-lived intangible assets |  | 1,228 |  |  |  |  |  |  | 1,232 |  |  |  |  |  |
Total goodwill and other indefinite-lived intangible assets |  | 58,603 |  |  |  |  |  |  | 58,536 |  |  |  |  |  |
Total intangible assets, gross | $ | 131,817 |  |  |  |  |  | $ | 131,887 |  |  |  |  |  |
(a) Weighted average life as of March 31, 2019. |
Goodwill Rollforward [Table Text Block] |
|  |  | (in thousands) |  |  |
Balance at December 31, 2018 | $ | 57,304 |  |  |
| Effect of change in currency translation |  | 71 |  |  |
Balance at March 31, 2019 | $ | 57,375 |  |  |

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