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Nature of Operations and Summary of Significant Accounting Policies - Intangible Assets By Major Asset Class (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 29, 2019 | Dec. 29, 2018
Acquired Definite-Lived Intangible Assets [Line Items] |  |
Gross | $ 252,375 | $ 178,755
Accumulated Amortization | (85,892) | (75,179)
Currency Translation | (6,176) | (6,714)
Net | 160,307 | 96,862
Acquired Intangible Assets [Abstract] |  |
Gross | 278,475 | 195,355
Currency Translation | (6,193) | (6,829)
Net | 186,390 | 113,347
Tradenames |  |
Acquired Indefinite-Lived Intangible Assets [Line Items] |  |
Gross | 26,100 | 16,600
Currency Translation | (17) | (115)
Net | 26,083 | 16,485
Customer relationships |  |
Acquired Definite-Lived Intangible Assets [Line Items] |  |
Gross | 171,583 | 113,283
Accumulated Amortization | (45,001) | (38,160)
Currency Translation | (3,661) | (4,520)
Net | 122,921 | 70,603
Product technology |  |
Acquired Definite-Lived Intangible Assets [Line Items] |  |
Gross | 57,501 | 46,501
Accumulated Amortization | (25,692) | (23,563)
Currency Translation | (1,544) | (1,677)
Net | 30,265 | 21,261
Tradenames |  |
Acquired Definite-Lived Intangible Assets [Line Items] |  |
Gross | 5,227 | 5,227
Accumulated Amortization | (2,201) | (1,980)
Currency Translation | (391) | (390)
Net | 2,635 | 2,857
Other |  |
Acquired Definite-Lived Intangible Assets [Line Items] |  |
Gross | 18,064 | 13,744
Accumulated Amortization | (12,998) | (11,476)
Currency Translation | (580) | (127)
Net | $ 4,486 | $ 2,141

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