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Income Taxes - Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Income Tax Disclosure [Abstract]
Provision for Income Taxes at Statutory Rate	$ 15,474	$ 14,474	$ 16,701
Increases (Decreases) Resulting From:
State income taxes, net of federal tax	807	(355)	164
U.S. tax cost of foreign earnings	599	146	1,215
Foreign tax rate differential	1,891	2,584	3,158
Reversal of tax benefit reserves, net	(730)	(286)	(1,785)
Change in valuation allowance	(469)	81	141
Nondeductible expenses	2,214	2,454	781
Research and development tax credits	(465)	(381)	(445)
Excess tax benefit related to stock-based compensation	(758)	(3,352)	(967)
Impact of the U.S. Tax Cuts and Jobs Act	0	0	(106)
Other	(615)	993	(375)
Total income tax provision	$ 17,948	$ 16,358	$ 18,482

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Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to Tax Cuts and Jobs Act.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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