Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Dec. 26, 2019	Dec. 27, 2018	Dec. 28, 2017	Dec. 30, 2021	Dec. 24, 2020
Income Taxes [Line Items]
Effective Income Tax Rate, Adjusted For Losses From Noncontrolling Interests		36.20%	22.70%	19.70%
Statutory federal income tax rate (as a percent)		21.00%	21.00%	21.00%	35.00%
Income tax refund claims		$ 37,400,000
Requested tax refunds received		31,500,000
Remaining tax refunds received	$ 5,900,000
Proceeds From Income Tax Paid Refunds		(33,275,000)	$ 3,062,000	$ (218,000)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		0	0				$ 0
Income Tax Examination Interest Income		296,000	$ 1,000	68,000
Net income taxes refunded related to net operating loss under CARES Act		31,500,000
Net operating loss and tax credit carry forwards		21,526,000
Current tax benefit		11,976,000		$ 1,947,000
Deferred tax benefit		$ 8,095,000
Effective Income Tax Rate Excluding Tax Credit		26.00%		22.70%
Federal
Income Taxes [Line Items]
Operating Loss Carryforwards		$ 28,691,000
Tax credit carryforwards		5,074,000
State
Income Taxes [Line Items]
Operating Loss Carryforwards		$ 175,039,000
Forecast [Member]
Income Taxes [Line Items]
Income tax refund						$ 21,000,000