Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Aug. 25, 2018	Aug. 26, 2017
Deferred Tax Assets
Payroll and benefit related	$ 14,718	$ 26,391
Insurance related	10,880	17,691
Environmental	6,593	9,945
Accrued expenses	3,513	4,542
Other	7,440	9,725
Total deferred tax assets	43,144	68,294
Deferred Tax Liabilities
Tax in excess of book depreciation	39,877	48,969
Purchased intangible assets	27,206	39,179
Rental merchandise in service	44,508	56,707
Other	318	25
Total deferred tax liabilities	111,909	144,880
Net deferred tax liability	$ 68,765	$ 76,586