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Restructuring Charges and Asset Impairments (Summary of Costs Incurred in Connection with Restructuring Charges and Asset Impairments) (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Jan. 01, 2021
Dec. 27, 2019
Restructuring And Related Activities [Abstract]      
Employee related costs   $ 5,710,000 $ 2,912,000
Lease right-of-use asset impairment charges   3,545,000  
Property, equipment and lease improvement impairment charges   340,000 1,180,000
Other lease related restructuring costs   893,000 422,000
Total $ 0 $ 10,488,000 $ 4,514,000