Related Parties - Affiliated Rents Paid for Restaurant Property Lease (Details) - USD ($) $ in Thousands	4 Months Ended
	Dec. 19, 2018	Dec. 20, 2017
Related Party Transaction [Line Items]
Capital expenditures	$ 1,119	$ 4,325
Other operating expenses, occupancy costs and opening costs, including property leases	22,410	25,835
Selling, general and administrative expenses	11,224	11,525
Total	$ 34,753	$ 41,685
Affiliated costs incurred as a percentage of relative total Company costs	0.64%	0.37%
Affiliated Cost Incurred
Related Party Transaction [Line Items]
Capital expenditures	$ 13	$ 0
Other operating expenses, occupancy costs and opening costs, including property leases	209	154
Total	$ 222	$ 154