Acquisitions (Details Textual) $ in Thousands	12 Months Ended
	Dec. 30, 2017 USD ($) acquisition	Dec. 31, 2016 USD ($)	Jan. 02, 2016 USD ($)
Business Acquisition [Line Items]
Cash paid in business combinations and asset acquisitions, net of cash acquired	$ 143,249	$ 41,627	$ 0
Goodwill resulting from acquisitions	90,218	23,579
Transaction costs associated with acquisitions	$ 600	$ 1,100	$ 700
2017 Acquisitions [Member]
Business Acquisition [Line Items]
Number of businesses acquired	2
Cash paid in business combinations and asset acquisitions, net of cash acquired	$ 142,800
Cash acquired	4,200
Technology-based intangible assets	76,400
Goodwill resulting from acquisitions	90,200
Net other identifiable assets and liabilities resulting from acquisitions	$ (19,600)
Weighted average useful life of finite-lived intangible assets acquired	5 years 7 months 6 days
2016 Acquisitions [Member]
Business Acquisition [Line Items]
Number of businesses acquired | acquisition	2
Cash paid in business combinations and asset acquisitions, net of cash acquired	$ 42,400
Cash acquired	1,800
Finite-lived intangible assets resulting from acquisitions	23,200
Goodwill resulting from acquisitions	23,600
Net other identifiable assets and liabilities resulting from acquisitions	$ (2,600)
Trust For Benefit Of Children of Chief Executive Officer [Member] | nusemi inc [Member]
Business Acquisition [Line Items]
Related party ownership percentage in acquired company	3.00%
Trust For Benefit Of Children of Chief Executive Officer [Member] | Rocketick Technologies [Member]
Business Acquisition [Line Items]
Related party ownership percentage in acquired company	2.00%
In-Process Technology [Member] | 2017 Acquisitions [Member]
Business Acquisition [Line Items]
In-process technology	$ 71,500