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Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Jan. 02, 2021	Mar. 28, 2020	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Goodwill [Line Items]
Indefinite-lived intangible assets	$ 26,599,000		$ 26,599,000	$ 28,849,000
Goodwill impairment			28,500,000
Goodwill	$ 292,434,000		292,434,000	270,820,000	$ 270,788,000
Trade names
Goodwill [Line Items]
Impairment of definite-lived intangible assets		$ 2,300,000
Indefinite-lived intangible assets		5,300,000
Trademarks and trade names
Goodwill [Line Items]
Impairment of definite-lived intangible assets		600,000
Customer lists
Goodwill [Line Items]
Impairment of definite-lived intangible assets		8,200,000
Office furniture reporting unit three
Goodwill [Line Items]
Goodwill		$ 6,900,000
Percentage of fair value in excess of carrying amount		21.00%
Reporting unit one and two
Goodwill [Line Items]
Goodwill		$ 0
Office furniture reporting unit one
Goodwill [Line Items]
Long-term growth rate		3.00%
Royalty rate		2.00%
Discount rate		16.00%
Goodwill impairment		$ 14,100,000
Office furniture reporting unit one | Minimum
Goodwill [Line Items]
Near term growth (percent)		(28.00%)
Office furniture reporting unit one | Maximum
Goodwill [Line Items]
Near term growth (percent)		12.00%
Office furniture reporting unit two
Goodwill [Line Items]
Goodwill impairment		$ 7,500,000
Workplace Furnishings, Smaller Reporting Unit
Goodwill [Line Items]
Long-term growth rate	4.00%
Discount rate	16.00%
Goodwill impairment	$ 6,900,000
Goodwill	$ 0		0
Workplace Furnishings, Smaller Reporting Unit | Minimum
Goodwill [Line Items]
Near term growth (percent)	12.00%
Workplace Furnishings, Smaller Reporting Unit | Maximum
Goodwill [Line Items]
Near term growth (percent)	18.00%
Workplace Furnishings
Goodwill [Line Items]
Goodwill impairment			28,500,000
Goodwill	$ 95,601,000		$ 95,601,000	$ 84,301,000	$ 84,269,000
Workplace Furnishings | Trade names
Goodwill [Line Items]
Impairment of indefinite-lived intangible assets		2,300,000
Workplace Furnishings | Trademarks and trade names
Goodwill [Line Items]
Impairment of definite-lived intangible assets		600,000
Workplace Furnishings | Customer lists
Goodwill [Line Items]
Impairment of definite-lived intangible assets		$ 8,200,000

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