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Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 417,456	$ 526,026	$ 886,161	$ 1,005,482
Workplace furnishings
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	308,081	409,512	646,467	763,023
Workplace furnishings | Systems and storage
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	167,007	235,657	371,028	440,031
Workplace furnishings | Seating
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	114,772	134,342	230,644	247,801
Workplace furnishings | Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	26,302	39,513	44,795	75,191
Residential building products
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 109,375	$ 116,514	$ 239,694	$ 242,459

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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