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Goodwill- Goodwill and Intangible Assets, Net (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Carrying amount of goodwill by reportable segment |  |  |
Increase (Decrease) in Other Current Assets | $ 845 | $ 3,808 | $ (5,297)
Amortization of Intangible Assets | (6,100) | (5,500) | (6,000)
Goodwill [Roll Forward] |  |  |
Goodwill | 135,844 | 131,879 | 130,250
Goodwill acquired | 106 | 1,815 |
Foreign exchange | 3,867 | 134 |
Goodwill, Other Increase (Decrease) | 8 | 320 |
Gross Carrying Amount | 67,127 | 59,256 |
North America |  |  |
Carrying amount of goodwill by reportable segment |  |  |
Increase (Decrease) in Other Current Assets | 161 |  |
Goodwill [Roll Forward] |  |  |
Goodwill | 96,311 | 96,244 | 96,435
Goodwill acquired | 0 | 0 |
Foreign exchange | 67 | 129 |
Goodwill, Other Increase (Decrease) | 0 | 320 |
Gross Carrying Amount | 40,786 | 33,756 |
Europe |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill | 38,059 | 34,300 | 32,471
Goodwill acquired | 106 | 1,815 |
Foreign exchange | 3,661 | 14 |
Goodwill, Other Increase (Decrease) | 8 | 0 |
Gross Carrying Amount | 26,341 | 25,500 |
Asia/Pacific |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill | 1,474 | 1,335 | 1,344
Goodwill acquired | 0 | 0 |
Foreign exchange | 139 | (9) |
Goodwill, Other Increase (Decrease) | 0 | 0 |
Patents |  |  |
Carrying amount of goodwill by reportable segment |  |  |
Amortization of Intangible Assets | (373) | (150) |
Goodwill [Roll Forward] |  |  |
Gross Carrying Amount | 4,699 | 4,659 | 2,109
Finite-lived Intangible Assets Acquired | 40 | 2,550 |
Noncompete Agreements Trademarks and Other |  |  |
Carrying amount of goodwill by reportable segment |  |  |
Amortization of Intangible Assets | (2,195) | (1,910) |
Reclassifications |  | (481) |
Goodwill [Roll Forward] |  |  |
Gross Carrying Amount | 21,582 | 14,703 | 12,225
Finite-lived Intangible Assets Acquired |  | 2,081 |
Noncompete Agreements Trademarks and Other | North America |  |  |
Carrying amount of goodwill by reportable segment |  |  |
Reclassifications | 481 |  |
Unpatented Technology |  |  |
Carrying amount of goodwill by reportable segment |  |  |
Amortization of Intangible Assets | (2,131) | (2,017) |
Goodwill [Roll Forward] |  |  |
Gross Carrying Amount | 22,104 | 21,616 | 20,662
Finite-lived Intangible Assets Acquired |  | 788 |
Customer Relationships |  |  |
Carrying amount of goodwill by reportable segment |  |  |
Amortization of Intangible Assets | (1,443) | (1,433) |
Goodwill [Roll Forward] |  |  |
Gross Carrying Amount | 18,123 | 17,660 | $ 17,563
Finite-lived Intangible Assets Acquired | $ 290 | $ 124 |

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