Leases (Supplemental Cash Flow Information) (Details) - USD ($) $ in Thousands	6 Months Ended
	Feb. 27, 2021	Feb. 29, 2020
Leases [Abstract]
Operating Cash Outflows from Operating Leases	$ 12,785	$ 12,188
Operating Cash Outflows from Finance Leases	45	55
Financing Cash Outflows from Finance Leases	642	504
Leased assets obtained in exchange for new operating lease liabilities	$ 9,670	9,817
Leased assets obtained in exchange for new finance lease liabilities		$ 1,973