Income Taxes - Significant Components of Company's Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Aug. 31, 2019	Aug. 25, 2018
Deferred tax assets:
Net operating loss and credit carryforwards	$ 42,958	$ 47,190
Accrued benefits	58,900	62,867
Other	59,237	46,375
Total deferred tax assets	161,095	156,432
Less: Valuation allowances	(23,923)	(19,619)
Net deferred tax assets	137,172	136,813
Deferred tax liabilities:
Property and equipment	(114,956)	(101,049)
Inventory	(259,827)	(242,138)
Prepaid expenses	(46,487)	(42,019)
Other	(1,021)	(2,191)
Total deferred tax liabilities	(422,291)	(387,397)
Net deferred tax liabilities	$ (285,119)	$ (250,584)