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Significant Accounting Policies - Fair Value Measurements (Details) - USD ($)
$ in Thousands
Sep. 26, 2021
Sep. 14, 2021
Dec. 27, 2020
Carrying Value      
Measurement of financial assets and liabilities at fair value on a recurring basis      
Cash surrender value of life insurance policies $ 40,482   $ 37,578
Interest rate swap liabilities $ 8,162   13,452
Notes      
Measurement of financial assets and liabilities at fair value on a recurring basis      
Fixed interest rate (as a percent) 3.875% 3.875%  
Notes | Carrying Value      
Measurement of financial assets and liabilities at fair value on a recurring basis      
3.875% Fixed Rate Senior Notes $ 400,000    
Measured on Recurring Basis | Level 1      
Measurement of financial assets and liabilities at fair value on a recurring basis      
Cash surrender value of life insurance policies 40,482   37,578
Measured on Recurring Basis | Level 2      
Measurement of financial assets and liabilities at fair value on a recurring basis      
Interest rate swap liabilities 8,162   $ 13,452
Measured on Recurring Basis | Notes | Level 2      
Measurement of financial assets and liabilities at fair value on a recurring basis      
3.875% Fixed Rate Senior Notes $ 401,000