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Business Combinations - Sales On Demand Corporation Acquisition (Details) - USD ($) $ in Thousands			12 Months Ended
	Oct. 02, 2017	Apr. 03, 2017	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill			$ 118,732	$ 118,896	$ 121,440
Gain on business acquisition			$ 0	0	$ 2,243
Sales On Demand Corporation
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross				16,649
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Cash		$ 125
Accounts receivable, net (1)		(5,496)
Inventory		18,290
Deferred tax assets, net		409
Goodwill		0
Intangible assets		8,640
Total assets		24,033
Accrued expenses and other current liabilities		(4,450)
Other liabilities		(691)
Total liabilities assumed		(5,141)
Net assets acquired		18,892
Gain on business acquisition				$ 2,243
Intangible assets acquired, fair value		8,640
Other assets		$ 2,065
Sales On Demand Corporation | Customer relationships
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Intangible assets, useful life		13 years
Intangible assets acquired, fair value		$ 4,490
Sales On Demand Corporation | Reacquired distribution rights
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Intangible assets, useful life		9 months
Intangible assets acquired, fair value		$ 4,150
Robopolis
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 169,400
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Cash	37,981
Accounts receivable, net (1)	21,426
Inventory	36,304
Goodwill	80,419
Intangible assets	36,597
Total assets	215,183
Other liabilities	(2,138)
Total liabilities assumed	(45,769)
Net assets acquired	169,414
Intangible assets acquired, fair value	36,597
Other assets	$ 2,456
Robopolis | Customer relationships
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Intangible assets, useful life	14 years
Intangible assets acquired, fair value	$ 7,029
Robopolis | Reacquired distribution rights
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Intangible assets, useful life	2 years 3 months
Intangible assets acquired, fair value	$ 29,296

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Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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