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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. 28, 2019 | Dec. 29, 2018
Acquired Definite-Lived Intangible Assets [Line Items] |  |
Gross | $ 252,421 | $ 178,755
Accumulated Amortization | (90,614) | (75,179)
Currency Translation | (8,037) | (6,714)
Net | 153,770 | 96,862
Acquired Intangible Assets [Abstract] |  |
Gross | 278,521 | 195,355
Currency Translation | (8,226) | (6,829)
Net | 179,681 | 113,347
Tradenames |  |
Acquired Indefinite-Lived Intangible Assets [Line Items] |  |
Gross | 26,100 | 16,600
Currency Translation | (189) | (115)
Net | 25,911 | 16,485
Customer relationships |  |
Acquired Definite-Lived Intangible Assets [Line Items] |  |
Gross | 171,583 | 113,283
Accumulated Amortization | (48,403) | (38,160)
Currency Translation | (5,037) | (4,520)
Net | 118,143 | 70,603
Product technology |  |
Acquired Definite-Lived Intangible Assets [Line Items] |  |
Gross | 57,647 | 46,501
Accumulated Amortization | (26,754) | (23,563)
Currency Translation | (1,932) | (1,677)
Net | 28,961 | 21,261
Tradenames |  |
Acquired Definite-Lived Intangible Assets [Line Items] |  |
Gross | 5,227 | 5,227
Accumulated Amortization | (2,311) | (1,980)
Currency Translation | (458) | (390)
Net | 2,458 | 2,857
Other |  |
Acquired Definite-Lived Intangible Assets [Line Items] |  |
Gross | 17,964 | 13,744
Accumulated Amortization | (13,146) | (11,476)
Currency Translation | (610) | (127)
Net | $ 4,208 | $ 2,141

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