Accumulated Other Comprehensive Income (Loss) - Reclassification from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 28, 2020	Nov. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Selling, general, and administrative expenses	$ 48,399	$ 51,105
Interest expense	9,941	6,049
Net income	57,423	14,068
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	9	20
Reclassification out of Accumulated Other Comprehensive Income | Amortization of net actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Selling, general, and administrative expenses	9	8
Reclassification out of Accumulated Other Comprehensive Income | Interest rate contract
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ 0	$ 12