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Acquisitions - Purchase Price Allocation and Estimated Amortization (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Schedule Of Asset Acquisition [Line Items]
Goodwill		$ 292,434	$ 270,820	$ 270,788
Design Public Group
Schedule Of Asset Acquisition [Line Items]
Inventories	$ 1,058
Prepaid expenses and other current assets	381
Accounts payable and accrued expenses	(8,299)
Goodwill	39,800
Total net assets	50,040
Design Public Group | Customer lists
Schedule Of Asset Acquisition [Line Items]
Intangible assets	$ 9,700
Weighted Average Amortization Period	6 years
Design Public Group | Software
Schedule Of Asset Acquisition [Line Items]
Intangible assets	$ 3,800
Weighted Average Amortization Period	4 years
Design Public Group | Trade names
Schedule Of Asset Acquisition [Line Items]
Intangible assets	$ 3,400
Weighted Average Amortization Period	10 years
Design Public Group | Other intangible assets
Schedule Of Asset Acquisition [Line Items]
Intangible assets	$ 200
Weighted Average Amortization Period	3 years

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