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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] |
| 2018 |  | 2017
Balance at beginning of year | $ | 539,838 |  |  | $ | 476,378 |
Goodwill acquired | 558 |  |  | 52,229 |
Foreign currency translation | (5,616 | ) |  | 11,231 |
Balance at year end | $ | 534,780 |  |  | $ | 539,838 |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Table Text Block] |
| 2018 |  | 2017
| Gross Amount |  | Accumulated Amortization |  | Intangibles, Net |  | Gross Amount |  | Accumulated Amortization |  | Intangibles, Net
Customer relationships | $ | 197,942 |  |  | $ | (49,887 | ) |  | $ | 148,055 |  |  | $ | 198,527 |  |  | $ | (41,794 | ) |  | $ | 156,733 |
Proven technology and patents | 73,880 |  |  | (42,750 | ) |  | 31,130 |  |  | 70,311 |  |  | (38,890 | ) |  | 31,421 |
Tradenames (finite life) | 4,504 |  |  | (2,874 | ) |  | 1,630 |  |  | 4,518 |  |  | (2,807 | ) |  | 1,711 |
Tradenames (indefinite life) | 35,500 |  |  | — |  |  | 35,500 |  |  | 35,562 |  |  | — |  |  | 35,562 |
Other | 3,684 |  |  | (2,691 | ) |  | 993 |  |  | 3,490 |  |  | (2,199 | ) |  | 1,291 |
| $ | 315,510 |  |  | $ | (98,202 | ) |  | $ | 217,308 |  |  | $ | 312,408 |  |  | $ | (85,690 | ) |  | $ | 226,718 |

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- Definition Tabular disclosure of amortizable intangible assets and the carrying value of intangible assets not subject to amortization, excluding goodwill, in total by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by nature or by their use in the operations of the company. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 + Details
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