Acquisitions (Details Textual) $ in Thousands	12 Months Ended
	Dec. 29, 2018 USD ($)	Dec. 30, 2017 USD ($)	Dec. 31, 2016 USD ($) acquisition
Business Acquisition [Line Items]
Cash paid in business combinations and asset acquisitions, net of cash acquired	$ 0	$ 143,249	$ 41,627
Goodwill resulting from acquisitions		90,218
Transaction costs associated with acquisitions	$ 0	$ 600	$ 1,100
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)
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
Goodwill resulting from acquisitions			23,600
Net other identifiable assets and liabilities resulting from acquisitions			(2,600)
Finite-lived intangible assets resulting from acquisitions			$ 23,200
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