Segment Reporting - Revenues and Income Before Income Taxes by Geographic Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 28, 2021	Aug. 29, 2020	Aug. 31, 2019
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	$ 1,826,216	$ 1,804,159	$ 1,809,376
Income before income taxes	196,871	177,888	237,924
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	1,672,530	1,659,913	1,683,321
Income before income taxes	187,442	175,301	236,843
Europe, Canada, Mexico and Nicaragua
Revenues From External Customers And Long Lived Assets [Line Items]
Income before income taxes	9,429	2,587	1,081
Europe and Canada
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	$ 153,686	$ 144,246	$ 126,055