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Operations and Summary of Significant Accounting Policies - Intangible Assets (Details) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2015 USD ($) asset | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Indefinite-Lived Intangible Assets |  |  |  |  |
Intangible assets | $ 2,134 | $ 5,666 | $ 2,128 | $ 2,134 | $ 5,666
Indefinite-Lived Intangibles |  |  |  |  |
Indefinite-Lived Intangibles, Balance at the beginning of the year | 2,134 | 5,666 |  |  |
Reclassifications |  | (3,349) |  |  |
Foreign exchange | (6) | (183) |  |  |
Indefinite-Lived Intangibles, Balance at the end of the year | 2,128 | 2,134 |  |  |
Finite-Lived Intangible Assets, Gross |  |  | 57,065 | 58,874 |
Finite-Lived Intangible Assets, Accumulated Amortization |  |  | (29,390) | (26,287) |
Intangible Assets, Net (Excluding Goodwill) |  |  | 27,675 | 32,587 |
North America |  |  |  |  |
Indefinite-Lived Intangibles |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  |  | 27,475 | 29,455 |
Finite-Lived Intangible Assets, Accumulated Amortization |  |  | (14,941) | (14,719) |
Intangible Assets, Net (Excluding Goodwill) |  |  | 12,534 | 14,736 |
Europe |  |  |  |  |
Indefinite-Lived Intangibles |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  |  | 29,590 | 29,419 |
Finite-Lived Intangible Assets, Accumulated Amortization |  |  | (14,449) | (11,568) |
Intangible Assets, Net (Excluding Goodwill) |  |  | 15,141 | 17,851 |
Customer Relationships |  |  |  |  |
Indefinite-Lived Intangibles |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  |  | 21,242 | 21,346 | 22,849
Finite-Lived Intangible Assets, Accumulated Amortization |  |  | (13,152) | (11,671) | (11,164)
Intangible Assets, Net (Excluding Goodwill) |  |  | 8,090 | 9,675 | 11,685
Noncompete Agreements Trademarks and Other |  |  |  |  |
Indefinite-Lived Intangibles |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  |  | 10,578 | 10,839 | 13,555
Finite-Lived Intangible Assets, Accumulated Amortization |  |  | (7,203) | (5,374) | (3,554)
Intangible Assets, Net (Excluding Goodwill) |  |  | 3,375 | 5,465 | 10,001
Unpatented Technology |  |  |  |  |
Indefinite-Lived Intangibles |  |  |  |  |
Reclassification of intangible assets | 3,300 |  |  |  |
Finite-Lived Intangible Assets, Gross |  |  | 21,604 | 22,797 | 18,977
Finite-Lived Intangible Assets, Accumulated Amortization |  |  | (8,656) | (7,665) | (5,257)
Intangible Assets, Net (Excluding Goodwill) |  |  | 12,948 | 15,132 | 13,720
ShearBrace | Unpatented Technology |  |  |  |  |
Indefinite-Lived Intangibles |  |  |  |  |
Reclassification of intangible assets | 2,000 |  |  |  |
Bierbach GmbH And Co. KG | Customer Relationships |  |  |  |  |
Indefinite-Lived Intangibles |  |  |  |  |
Adjustment to intangible asset from business acquisition | 600 |  |  |  |
Bierbach GmbH And Co. KG | Noncompete Agreements Trademarks and Other |  |  |  |  |
Indefinite-Lived Intangibles |  |  |  |  |
Adjustment to intangible asset from business acquisition |  | 500 |  |  |
Bierbach GmbH And Co. KG | Goodwill |  |  |  |  |
Indefinite-Lived Intangibles |  |  |  |  |
Adjustment to intangible asset from business acquisition |  | 100 |  |  |
In Process Research and Development Two [Member] |  |  |  |  |
Indefinite-Lived Intangible Assets |  |  |  |  |
Intangible assets | 1,500 |  | 1,500 |  |
Indefinite-Lived Intangibles |  |  |  |  |
Indefinite-Lived Intangibles, Balance at the end of the year | 1,500 |  |  |  |
Trade Name |  |  |  |  |
Indefinite-Lived Intangible Assets |  |  |  |  |
Intangible assets | 616 | 616 | 616 | 616 | 616
Indefinite-Lived Intangibles |  |  |  |  |
Indefinite-Lived Intangibles, Balance at the beginning of the year | 616 | 616 |  |  |
Reclassifications |  | 0 |  |  |
Foreign exchange | 0 | 0 |  |  |
Indefinite-Lived Intangibles, Balance at the end of the year | 616 | 616 |  |  |
In-process research and development assets |  |  |  |  |
Indefinite-Lived Intangible Assets |  |  |  |  |
Intangible assets | 1,518 | 5,050 | $ 1,512 | $ 1,518 | $ 5,050
Number of indefinite-lived assets | asset |  |  | 1 |  |
Indefinite-Lived Intangibles |  |  |  |  |
Indefinite-Lived Intangibles, Balance at the beginning of the year | 1,518 | 5,050 |  |  |
Reclassifications |  | (3,349) |  |  |
Foreign exchange | (6) | (183) |  |  |
Indefinite-Lived Intangibles, Balance at the end of the year | $ 1,512 | $ 1,518 |  |  |

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