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Goodwill- Goodwill and Intangible Assets, Net (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Carrying amount of goodwill by reportable segment |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Other Current Assets |  |  |  |  |  |  |  |  | $ 3,808 | $ (5,297) | $ 2,016
Amortization of Intangible Assets |  |  |  |  |  |  |  |  | (5,500) | (6,000) | (6,100)
Goodwill [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Goodwill, Gross | $ 162,647 |  |  |  | $ 161,018 |  |  |  | 162,647 | 161,018 | 161,221
Accumulated impairment losses | (30,768) |  |  |  | (30,768) |  |  |  | (30,768) | (30,768) | (24,081)
Goodwill | 131,879 |  |  |  | 130,250 |  |  |  | 131,879 | 130,250 | 137,140
Goodwill acquired |  |  |  |  |  |  |  |  | 1,815 | 913 |
Foreign exchange |  |  |  |  |  |  |  |  | 134 | (1,117) |
Impairment of goodwill | 0 | $ 0 | $ 0 | $ 0 | (6,686) | $ 0 | $ 0 | $ 0 | 0 | (6,686) | 0
Goodwill, Other Increase (Decrease) |  |  |  |  |  |  |  |  | 320 |  |
North America |  |  |  |  |  |  |  |  |  |  |
Carrying amount of goodwill by reportable segment |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Other Current Assets |  |  |  |  |  |  |  |  | 161 |  |
Goodwill [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Goodwill, Gross | 106,910 |  |  |  | 107,101 |  |  |  | 106,910 | 107,101 | 106,421
Accumulated impairment losses | (10,666) |  |  |  | (10,666) |  |  |  | (10,666) | (10,666) | (10,666)
Goodwill | 96,244 |  |  |  | 96,435 |  |  |  | 96,244 | 96,435 | 95,755
Goodwill acquired |  |  |  |  |  |  |  |  | 0 | 913 |
Foreign exchange |  |  |  |  |  |  |  |  | 129 | (233) |
Impairment of goodwill |  |  |  |  |  |  |  |  | 0 | 0 |
Goodwill, Other Increase (Decrease) |  |  |  |  |  |  |  |  | 320 |  |
Europe |  |  |  |  |  |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Goodwill, Gross | 54,402 |  |  |  | 52,573 |  |  |  | 54,402 | 52,573 | 53,311
Accumulated impairment losses | (20,102) |  |  |  | (20,102) |  |  |  | (20,102) | (20,102) | (13,415)
Goodwill | 34,300 |  |  |  | 32,471 |  |  |  | 34,300 | 32,471 | 39,896
Goodwill acquired |  |  |  |  |  |  |  |  | 1,815 | 0 |
Foreign exchange |  |  |  |  |  |  |  |  | 14 | (739) |
Impairment of goodwill |  |  |  |  |  |  |  |  |  | (6,686) |
Goodwill, Other Increase (Decrease) |  |  |  |  |  |  |  |  | 0 |  |
Asia/Pacific |  |  |  |  |  |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Goodwill, Gross | 1,335 |  |  |  | 1,344 |  |  |  | 1,335 | 1,344 | 1,489
Accumulated impairment losses | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Goodwill | $ 1,335 |  |  |  | $ 1,344 |  |  |  | 1,335 | 1,344 | $ 1,489
Goodwill acquired |  |  |  |  |  |  |  |  | 0 | 0 |
Foreign exchange |  |  |  |  |  |  |  |  | (9) | (145) |
Impairment of goodwill |  |  |  |  |  |  |  |  |  | 0 |
Goodwill, Other Increase (Decrease) |  |  |  |  |  |  |  |  | 0 |  |
Patents |  |  |  |  |  |  |  |  |  |  |
Carrying amount of goodwill by reportable segment |  |  |  |  |  |  |  |  |  |  |
Amortization of Intangible Assets |  |  |  |  |  |  |  |  | (150) | (107) |
Noncompete Agreements Trademarks and Other |  |  |  |  |  |  |  |  |  |  |
Carrying amount of goodwill by reportable segment |  |  |  |  |  |  |  |  |  |  |
Amortization of Intangible Assets |  |  |  |  |  |  |  |  | (1,910) | (1,757) |
Reclassifications |  |  |  |  |  |  |  |  | (481) | $ 24 |
Noncompete Agreements Trademarks and Other | North America |  |  |  |  |  |  |  |  |  |  |
Carrying amount of goodwill by reportable segment |  |  |  |  |  |  |  |  |  |  |
Reclassifications |  |  |  |  |  |  |  |  | $ 481 |  |

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