Income Taxes - Significant Components of Company's Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Aug. 25, 2018	Aug. 26, 2017
Deferred tax assets:
Net operating loss and credit carryforwards	$ 47,190	$ 48,062
Accrued benefits	62,867	96,664
Other	46,375	56,052
Total deferred tax assets	156,432	200,778
Less: Valuation allowances	(19,619)	(13,501)
Net deferred tax assets	136,813	187,277
Deferred tax liabilities:
Property and equipment	(101,049)	(117,580)
Inventory	(242,138)	(333,422)
Prepaid expenses	(42,019)	(60,920)
Other	(2,191)	(11,158)
Total deferred tax liabilities	(387,397)	(523,080)
Net deferred tax liabilities	$ (250,584)	$ (335,803)