Long-Term Debt and Line of Credit - Schedule of Debt (Details) - USD ($) $ in Thousands	9 Months Ended
	May 30, 2020	Aug. 31, 2019
Debt Disclosure [Abstract]
Document Period End Date	May 30, 2020
Term Facility (effective rate of 4.8% at May 30, 2020)	$ 635,500	$ 196,500
Revolving Credit Facility (effective rate of 4.2% at May 30, 2020)	25,000	0
Finance lease liabilities (effective rate of 5.6% at May 30, 2020)	987	0
Less: Deferred financing fees	11,467	5,565
Total debt	650,020	190,935
Less: Current maturities, net of deferred financing fees of $0.0 million at May 30, 2020 and $1.3 million at August 31, 2019	(25,000)	(676)
Less: Current finance lease liabilities	(268)	0
Long-term debt, net of deferred financing fees	624,752	190,259
Deferred financing fees, current	$ 0	$ 1,300