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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Amount of foreign currency translation gain (loss) which increases (decreases) assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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