Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Aug. 26, 2017	Aug. 27, 2016
Deferred Tax Assets
Payroll and benefit related	$ 26,391	$ 25,091
Insurance related	17,691	14,404
Environmental	9,945	10,465
Accrued expenses	4,542	1,418
Other	9,725	8,902
Total deferred tax assets	68,294	60,280
Deferred Tax Liabilities
Tax in excess of book depreciation	48,969	48,414
Purchased intangible assets	39,179	35,697
Rental merchandise in service	56,707	51,869
Other	25	0
Total deferred tax liabilities	144,880	135,980
Net deferred tax liability	$ 76,586	$ 75,700