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Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 03, 2021
Mar. 28, 2020
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers $ 484,293 $ 468,704
Workplace furnishings    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 302,748 338,386
Workplace furnishings | Systems and storage    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 182,859 204,021
Workplace furnishings | Seating    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 101,650 115,872
Workplace furnishings | Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 18,239 18,493
Residential building products    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers $ 181,545 $ 130,318