Summary of Significant Accounting Policies - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying amount	$ 299,004	$ 198,242
Accumulated Amortization	$ (139,279)	$ (111,846)
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Weighted Avg Remaining LIfe	6 years 36 days	4 years 256 days
Gross Carrying amount	$ 264,373	$ 167,278
Accumulated Amortization	$ (109,096)	$ (84,312)
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Weighted Avg Remaining LIfe	3 months	0 years
Gross Carrying amount	$ 13,763	$ 11,178
Accumulated Amortization	$ (12,963)	$ (11,178)
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Weighted Avg Remaining LIfe	3 years 292 days	4 years 219 days
Gross Carrying amount	$ 20,868	$ 19,786
Accumulated Amortization	(17,220)	(16,356)
Tradenames And Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 589,705	$ 405,635