Derivatives, Investments and Fair Value Measurements Fair Value Measurements (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Feb. 23, 2019	Aug. 25, 2018
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Domestic equity funds	$ 830	$ 1,143
International equity funds	147	139
Fixed income funds	162	223
Interest rate swap contract, assets	1,090	1,959
Total assets at fair value	2,229	3,464
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Domestic equity funds	750	1,114
International equity funds	92	120
Fixed income funds	24	132
Interest rate swap contract, assets	0	0
Total assets at fair value	866	1,366
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Domestic equity funds	80	29
International equity funds	55	19
Fixed income funds	138	91
Interest rate swap contract, assets	1,090	1,959
Total assets at fair value	1,363	2,098
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Domestic equity funds	0	0
International equity funds	0	0
Fixed income funds	0	0
Interest rate swap contract, assets	0	0
Total assets at fair value	$ 0	$ 0