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. 29, 2018	Dec. 30, 2017
Acquired Definite-Lived Intangible Assets [Line Items]
Gross	$ 178,755	$ 178,783
Currency Translation	(4,430)	(1,655)
Accumulated Amortization	(71,765)	(60,997)
Net	102,560	116,131
Acquired Intangible Assets [Abstract]
Gross	195,355	195,383
Currency Translation	(4,344)	(1,350)
Net	119,246	133,036
Trade Names [Member]
Acquired Indefinite-Lived Intangible Assets [Line Items]
Gross	16,600	16,600
Currency Translation	86	305
Net	16,686	16,905
Customer Relationships [Member]
Acquired Definite-Lived Intangible Assets [Line Items]
Gross	113,283	113,301
Currency Translation	(2,716)	(621)
Accumulated Amortization	(35,873)	(28,789)
Net	74,694	83,891
Product Technology [Member]
Acquired Definite-Lived Intangible Assets [Line Items]
Gross	46,501	46,501
Currency Translation	(1,282)	(737)
Accumulated Amortization	(22,653)	(19,841)
Net	22,566	25,923
Trade Names [Member]
Acquired Definite-Lived Intangible Assets [Line Items]
Gross	5,227	5,227
Currency Translation	(344)	(262)
Accumulated Amortization	(1,864)	(1,504)
Net	3,019	3,461
Other Intangibles [Member]
Acquired Definite-Lived Intangible Assets [Line Items]
Gross	13,744	13,754
Currency Translation	(88)	(35)
Accumulated Amortization	(11,375)	(10,863)
Net	$ 2,281	$ 2,856