Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 24, 2018	Nov. 25, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,464,967	$ 1,453,192
Other comprehensive loss	(2,194)	(1,927)
Balance at end of period	1,539,498	1,485,608
Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(21,116)	(15,932)
Other comprehensive (loss) income before reclassification	(2,282)	(2,013)
Amounts reclassified from accumulated other comprehensive loss	0	0
Other comprehensive loss	(2,282)	(2,013)
Balance at end of period	(23,398)	(17,945)
Pension-related
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(4,135)	(5,477)
Other comprehensive (loss) income before reclassification	0	0
Amounts reclassified from accumulated other comprehensive loss	0	0
Other comprehensive loss	0	0
Balance at end of period	(4,135)	(5,477)
Derivative Financial Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	92	(109)
Other comprehensive (loss) income before reclassification	132	82
Amounts reclassified from accumulated other comprehensive loss	(44)	4
Other comprehensive loss	88	86
Balance at end of period	180	(23)
Total Accumulated Other Comprehensive (Loss) Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(25,159)	(21,518)
Other comprehensive (loss) income before reclassification	(2,150)	(1,931)
Amounts reclassified from accumulated other comprehensive loss	(44)	4
Other comprehensive loss	(2,194)	(1,927)
Balance at end of period	$ (27,353)	$ (23,445)