Leases - Lease Costs (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Apr. 12, 2020 USD ($)	Apr. 12, 2020 USD ($)
Finance Lease Costs [Abstract]
Amortization of ROU assets	$ 179	$ 413
Interest on lease liabilities	28	61
Operating lease cost	43,891	102,403
Short-term lease cost	102	103
Variable lease cost	9,316	21,823
Lease cost, total	$ 53,516	$ 124,803
Weighted-average remaining lease term (in years):
Finance leases	3 years 7 months 6 days	3 years 7 months 6 days
Operating leases	8 years 2 months 12 days	8 years 2 months 12 days
Weighted-average discount rate:
Finance leases	3.50%	3.50%
Operating leases	4.00%	4.00%
Variable lease cost, executory costs reimbursed by sub-lessees	$ 8,600	$ 20,200