Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017	Dec. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 61,942		$ 61,942
Amortization of Intangible Assets	17,600	$ 9,100	38,800	$ 26,500
Finite-Lived Intangible Assets, Gross	662,845		662,845		$ 372,670
Finite-Lived Intangible Assets, Accumulated Amortization	(247,106)		(247,106)		(207,334)
Finite-Lived Intangible Assets, Amortization Expense, Year Two	59,711		59,711
Finite-Lived Intangible Assets, Amortization Expense, Year Three	56,231		56,231
Finite-Lived Intangible Assets, Amortization Expense, Year Four	53,622		53,622
Finite-Lived Intangible Assets, Amortization Expense, Year Five	44,918		44,918
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	139,315		139,315
Finite-Lived Intangible Assets, Net	415,739		$ 415,739
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			8 years	5 years 2 months
Finite-Lived Intangible Assets, Gross	602,376		$ 602,376		330,496
Finite-Lived Intangible Assets, Accumulated Amortization	(206,950)		$ (206,950)		(171,005)
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			0 years	9 months
Finite-Lived Intangible Assets, Gross	19,910		$ 19,910		19,689
Finite-Lived Intangible Assets, Accumulated Amortization	(19,910)		$ (19,910)		(18,081)
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			6 years 1 month	4 years 2 months
Finite-Lived Intangible Assets, Gross	40,559		$ 40,559		22,485
Finite-Lived Intangible Assets, Accumulated Amortization	(20,246)		(20,246)		(18,248)
Tradenames And Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	$ 859,403		$ 859,403		$ 615,090