Derivatives, Investments and Fair Value Measurements Fair Value Measurements (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	May 25, 2019	Aug. 25, 2018
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Domestic equity funds	$ 439	$ 1,143
International equity funds	108	139
Fixed income funds	155	223
Interest rate swap contract, assets	614	1,959
Total assets at fair value	1,316	3,464
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Domestic equity funds	357	1,114
International equity funds	52	120
Fixed income funds	22	132
Interest rate swap contract, assets	0	0
Total assets at fair value	431	1,366
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Domestic equity funds	82	29
International equity funds	56	19
Fixed income funds	133	91
Interest rate swap contract, assets	614	1,959
Total assets at fair value	885	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