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Nature of Operations and Summary of Significant Accounting Policies - Intangible Assets By Major Asset Class (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Gross |  | $ 193,883 | $ 109,843
Currency Translation | $ (1,739) | (8,073) |
Accumulated Amortization | (56,913) | (49,040) |
Net | 135,231 | 52,730 |
Customer Relationships [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Gross |  | 111,801 | 59,101
Currency Translation | (821) | (5,202) |
Accumulated Amortization | (26,404) | (21,805) |
Net | 84,576 | 32,094 |
Intellectual Property [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Gross |  | 46,501 | 27,101
Currency Translation | (817) | (2,052) |
Accumulated Amortization | (18,846) | (17,105) |
Net | 26,838 | 7,944 |
Trade Names [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Gross |  | 21,827 | 12,547
Currency Translation | (39) | (591) |
Accumulated Amortization | (1,382) | (1,065) |
Net | 20,406 | 10,891 |
Other Intangibles [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Gross |  | 13,754 | $ 11,094
Currency Translation | (62) | (228) |
Accumulated Amortization | (10,281) | (9,065) |
Net | $ 3,411 | $ 1,801 |

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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