Leases - Additional Lease Costs (Details) $ in Thousands	9 Months Ended
	May 30, 2020 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 1,807
Operating cash flows from finance leases	205
Financing cash flows from finance leases	232
Leased assets obtained in exchange for lease liabilities:
Operating leases	1,663
Finance leases	$ 5,664
Weighted average remaining lease term (in years):
Operating leases	8 years 10 months 24 days
Finance leases	8 years
Weighted average discount rate:
Weighted average discount rate:	6.20%
Finance leases	6.20%
Unfavorable lease liability	$ 1,000