Summary of Significant Accounting Policies - Components of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Aug. 26, 2017	Aug. 27, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,227,440	$ 1,201,113
Less: accumulated depreciation	702,325	661,295
Total property, plant and equipment	525,115	539,818
Land, buildings and leasehold equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	467,050	432,716
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	540,185	569,627
Motor vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 220,205	$ 198,770