Long-Term Debt - Narrative (Details)		3 Months Ended		9 Months Ended
	May 13, 2020 USD ($)	Sep. 23, 2020 USD ($)	Jun. 24, 2020 USD ($)	Sep. 23, 2020 USD ($)	May 26, 2021 USD ($)	Dec. 25, 2019 USD ($)	Sep. 25, 2019 USD ($)	Jun. 26, 2019 USD ($)	Dec. 26, 2018 USD ($)
Line of Credit Facility [Line Items]
Liquidity covenant availability		$ 92,700,000		$ 92,700,000
Interest rate swaps		(17,200,000)		(17,200,000)
Unrealized losses remained in accumulated other comprehensive loss, net		138,371,000	$ 217,507,000	138,371,000		$ 138,064,000	$ 118,746,000	$ 142,572,000	$ 133,345,000
Other Nonoperating Income (Expense)
Line of Credit Facility [Line Items]
Unrealized loss on derivatives		7,800,000		3,700,000
Derivatives
Line of Credit Facility [Line Items]
Interest rate swaps		(67,800,000)		(67,800,000)
Reclassification			$ 7,400,000	7,354,000
Derivatives
Line of Credit Facility [Line Items]
Reclassification				2,097,000
Unrealized losses remained in accumulated other comprehensive loss, net		60,474,000		60,474,000
Derivatives
Line of Credit Facility [Line Items]
Reclassification		300,000		552,000
Interest Rate Swap
Line of Credit Facility [Line Items]
Expected reclassification within next twelve months				3,900,000
Interest Rate Swap | Derivatives
Line of Credit Facility [Line Items]
Expected reclassification within next twelve months				400,000
2018 Swaps | Derivatives
Line of Credit Facility [Line Items]
Unrealized losses remained in accumulated other comprehensive loss, net		64,600,000		$ 64,600,000
Senior Secured Revolver
Line of Credit Facility [Line Items]
Line of credit facility, term				5 years
Line of credit facility, current borrowing capacity		400,000,000		$ 400,000,000
Accordion feature that allows increase in size of facility		450,000,000		450,000,000
Outstanding amount under credit facility		230,000,000.0		230,000,000.0
Availability under the credit facility		$ 152,700,000		$ 152,700,000
Commitment fee, percent	0.40%
Capital expenditures restrictions	$ 10,000,000
Weighted-average interest rate		3.16%		3.16%		3.47%
Senior Secured Revolver | Interest Rate Swap
Line of Credit Facility [Line Items]
Weighted-average interest rate		4.85%		4.85%		3.99%
Senior Secured Revolver | LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate debt (as a percent)	3.00%
Letter of Credit
Line of Credit Facility [Line Items]
Line of credit facility, current borrowing capacity		$ 30,000,000		$ 30,000,000
Outstanding amount of letters of credit		$ 17,300,000		$ 17,300,000
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 | Forecast
Line of Credit Facility [Line Items]
Liquidity requirement					$ 70,000,000
Letter of Credit | Senior Secured Revolver | Until Quarter Ending March 31, 2021
Line of Credit Facility [Line Items]
Fixed charge coverage ratio, minimum	1.50
Covenant, leverage ratio	4.50
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 | Second Quarter of 2021
Line of Credit Facility [Line Items]
Covenant, leverage ratio	4.25
Letter of Credit | Senior Secured Revolver | Third Quarter 2021 and Thereafter
Line of Credit Facility [Line Items]
Covenant, leverage ratio	4.00