Leases - Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Oct. 03, 2021	Sep. 27, 2020
Loans and Leases Receivable Disclosure [Line Items]
Variable lease cost	$ 4,599	$ 4,410	$ 14,046	$ 11,886
Amortization of right-of-use assets	240	221	549	1,103
Interest on lease liabilities	35	26	86	108
Total lease cost	31,038	30,954	92,784	90,621
Restaurant Rent Expense [Member]
Loans and Leases Receivable Disclosure [Line Items]
Operating lease cost	25,951	26,126	77,410	77,088
General and Administrative Expense [Member]
Loans and Leases Receivable Disclosure [Line Items]
Operating lease cost	$ 213	$ 171	$ 693	$ 436