Leases - Cost (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 29, 2019	Sep. 29, 2019
Loans and Leases Receivable Disclosure [Line Items]
Variable lease cost	$ 4,529	$ 12,619
Sublease income	(162)	(483)
Amortization of right-of-use assets	414	1,248
Interest on lease liabilities	69	204
Total lease cost	29,954	79,751
Restaurant Rent Expense [Member]
Loans and Leases Receivable Disclosure [Line Items]
Operating lease cost	24,933	65,770
General and Administrative Expense [Member]
Loans and Leases Receivable Disclosure [Line Items]
Operating lease cost	$ 171	$ 393