Property, Plant, and Equipment Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 25, 2019	May 26, 2018	May 25, 2019	May 26, 2018	Aug. 25, 2018
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 262,158		$ 262,158		$ 239,257
Less accumulated depreciation	140,181		140,181		138,064
Property, plant, and equipment, net	121,977		121,977		101,193
Depreciation	3,520	$ 2,351	9,788	$ 6,679
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	8,686		8,686		6,747
Buildings and building improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	112,898		112,898		94,622
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	108,585		108,585		105,663
Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	28,152		28,152		23,388
Transportation [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 3,837		$ 3,837		$ 8,837