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Long-Term Debt - (Narrative) (Details)
 3 Months Ended 12 Months Ended
Dec. 15, 2020
USD ($)
May 13, 2020
USD ($)
Jun. 24, 2020
USD ($)
Dec. 30, 2020
USD ($)
amendment
Dec. 25, 2019
USD ($)
Dec. 26, 2018
USD ($)
Jul. 01, 2021
USD ($)
Mar. 31, 2021
USD ($)
Dec. 27, 2017
USD ($)
Line of Credit Facility [Line Items]                  
Debt instrument, term       5 years          
Maximum borrowing capacity $ 400,000,000                
Nonoperating income (expense)       $ 200,000          
Unrealized remained in accumulated other comprehensive loss, net       130,446,000 $ 138,064,000 $ 133,345,000     $ 97,360,000
Derivatives                  
Line of Credit Facility [Line Items]                  
Reclassification     $ 7,400,000 7,354,000          
Derivatives                  
Line of Credit Facility [Line Items]                  
Reclassification       783,000          
Derivatives                  
Line of Credit Facility [Line Items]                  
Reclassification       3,160,000 291,000 307,000      
Unrealized remained in accumulated other comprehensive loss, net       59,427,000 $ 33,179,000 $ 3,319,000     $ 1,334,000
2015 Hedges                  
Line of Credit Facility [Line Items]                  
Interest rate swaps, net       15,900,000          
Expect reclassification within next twelve months       3,900,000          
2018 Hedges | Other Nonoperating Income (Expense)                  
Line of Credit Facility [Line Items]                  
Unrealized gain (loss) on derivatives       10,300,000          
2018 Hedges | Derivatives                  
Line of Credit Facility [Line Items]                  
Interest rate swaps, net       60,500,000          
Expect reclassification within next twelve months       200,000          
Reclassification     $ 7,400,000            
2018 Hedges | Derivatives | Other Current Liabilities                  
Line of Credit Facility [Line Items]                  
Interest rate swaps, net       300,000          
2018 Hedges | Derivatives | Other Noncurrent Liabilities                  
Line of Credit Facility [Line Items]                  
Interest rate swaps, net       60,200,000          
2018 Hedges | Derivatives                  
Line of Credit Facility [Line Items]                  
Reclassification       800,000          
2018 Hedges | Derivatives                  
Line of Credit Facility [Line Items]                  
Unrealized remained in accumulated other comprehensive loss, net       64,400,000          
Senior secured revolver                  
Line of Credit Facility [Line Items]                  
Maximum borrowing capacity 375,000,000     375,000,000          
Outstanding amount under credit facility       210,000,000.0          
Availability under the revolving facility       147,700,000          
Liquidity covenant availability       $ 81,600,000          
Number of amendment | amendment       2          
Commitment fee, percent   0.40%              
Capital expenditures restrictions $ 10,000,000 $ 10,000,000              
Weighted-average interest rate       3.15% 3.47%        
Senior secured revolver | Interest rate swaps, net                  
Line of Credit Facility [Line Items]                  
Weighted-average interest rate       5.01% 3.99%        
Senior secured revolver | Forecast                  
Line of Credit Facility [Line Items]                  
Maximum borrowing capacity             $ 350,000,000    
Capital expenditures restrictions expanded amount               $ 12,000,000  
Senior secured revolver | LIBOR                  
Line of Credit Facility [Line Items]                  
Basis spread on variable rate debt 3.00% 3.00%              
Letter of credit                  
Line of Credit Facility [Line Items]                  
Maximum borrowing capacity       $ 30,000,000          
Outstanding amount under letter of credit       $ 17,300,000          
Letter of credit | Senior secured revolver                  
Line of Credit Facility [Line Items]                  
Liquidity requirement $ 70,000,000                
Letter of credit | Senior secured revolver | Minimum                  
Line of Credit Facility [Line Items]                  
Liquidity requirement   $ 60,000,000              
Letter of credit | Senior secured revolver | Maximum                  
Line of Credit Facility [Line Items]                  
Liquidity requirement   $ 70,000,000              
Letter of credit | Senior secured revolver | Before Amendment                  
Line of Credit Facility [Line Items]                  
Covenant, leverage ratio   4.00              
Letter of credit | Senior secured revolver | Until Quarter Ending March 31, 2021                  
Line of Credit Facility [Line Items]                  
Fixed charge coverage ratio, minimum 1.00 1.50              
Covenant, leverage ratio 5.25 4.50              
Letter of credit | Senior secured revolver | Second Quarter of 2021                  
Line of Credit Facility [Line Items]                  
Covenant, leverage ratio 4.75 4.25              
Fixed charge coverage ratio, adjusted value 1.25                
Letter of credit | Senior secured revolver | Third Quarter 2021 and Thereafter                  
Line of Credit Facility [Line Items]                  
Covenant, leverage ratio 4.00 4.00              
Fixed charge coverage ratio, adjusted value 1.50