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Leases (Details) $ in Thousands	3 Months Ended	12 Months Ended
Leases (Details) $ in Thousands	Nov. 01, 2019 USD ($) Period	Jul. 31, 2009 Store	Jul. 28, 2000 Store	Aug. 02, 2019 USD ($)
Components of Lease Cost for Operating Leases [Abstract]
Operating lease cost	$ 19,856
Short term lease cost	384
Variable lease cost	451
Total lease cost	20,691
Operating cash flow information [Abstract]
Cash paid for amounts included in the measurement of lease liabilities	19,546
Noncash information [Abstract]
Right-of-use assets obtained in exchange for new operating lease liabilities	3,838
Lease modifications granting additional right-of-use assets	6,826
Lease modifications removing right-of-use assets	$ (649)
Weighted-Average Remaining Lease Term and Weighted-Average Discount Rate for Operating Leases [Abstract]
Weighted-average remaining lease term	18 years 1 month 9 days
Weighted-average discount rate	3.85%
Maturities of Undiscounted Cash Flows Reconciled to Total Lease Liability [Abstract]
Remainder of 2020	$ 58,082
2021	46,975
2022	40,480
2023	36,676
2024	36,530
Thereafter	532,648
Total future minimum lease payments	751,391
Less imputed remaining interest	(233,622)
Total present value of operating lease liabilities	$ 517,769
Maturities of Lease Commitments Prior to Adoption of New Lease Guidance [Abstract]
2020				$ 69,249
2021				40,962
2022				36,280
2023				33,639
2024				34,020
Thereafter				515,169
Total				$ 729,319
Restaurant [Member]
Sale Leaseback Transactions [Abstract]
Initial lease term	10 years
Lease renewal option	5 years
Undiscounted future payments for leases not yet commenced	$ 17,300
Restaurant [Member] \| Minimum [Member]
Sale Leaseback Transactions [Abstract]
Number of optional renewal periods \| Period	4
Restaurant [Member] \| Maximum [Member]
Sale Leaseback Transactions [Abstract]
Number of optional renewal periods \| Period	5
Sale-leaseback Transactions in 2009 [Member] \| Owned Stores [Member]
Sale Leaseback Transactions [Abstract]
Number of owned stores involved in sale-lease back transactions \| Store		15
Initial lease term	20 years
Lease renewal option	20 years
Sale-leaseback Transactions in 2009 [Member] \| Retail Distribution Center [Member]
Sale Leaseback Transactions [Abstract]
Initial lease term	15 years
Lease renewal option	20 years
Sale-leaseback Transactions in 2000 [Member] \| Owned Stores [Member]
Sale Leaseback Transactions [Abstract]
Number of owned stores involved in sale-lease back transactions \| Store			65
Initial lease term	21 years
Lease renewal option	20 years