Derivatives, Investments and Fair Value Measurements Fair Value Measurements (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Nov. 24, 2018	Aug. 25, 2018
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Domestic equity funds	$ 996	$ 1,143
International equity funds	141	139
Fixed income funds	215	223
Interest rate swap contract, assets	1,930	1,959
Total assets (liabilities) at fair value	3,282	3,464
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Domestic equity funds	928	1,114
International equity funds	100	120
Fixed income funds	61	132
Interest rate swap contract, assets	0	0
Total assets (liabilities) at fair value	1,089	1,366
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Domestic equity funds	68	29
International equity funds	41	19
Fixed income funds	154	91
Interest rate swap contract, assets	1,930	1,959
Total assets (liabilities) at fair value	2,193	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 (liabilities) at fair value	$ 0	$ 0