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Income Taxes - Effective Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Reconciliation of the expected tax (benefit) expense
Statutory federal income tax	$ 20,755	$ 22,812	$ 26,728
State taxes (net of federal benefit)	3,999	4,312	2,089
Federal and state credits	(8,152)	(5,638)	(4,486)
Domestic production activities deduction	0	0	(1,528)
Excess tax benefits relating to stock-based compensation	(6,468)	(6,529)	(11,709)
Tax Cuts and Jobs Act of 2017	0	2,127	11,861
Foreign-derived intangible income deduction	(4,180)	(2,678)	0
EMEA business restructuring	0	2,292	0
Executive compensation	2,081	745	1,354
Tax impact of foreign earnings	1,986	1,336	(636)
Change in valuation allowance	2,678	348	800
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(768)		(523)
Other	834	1,503	929
Total expected tax (benefits) expenses	$ 13,533	$ 20,630	$ 25,402

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