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Derivatives, Investments and Fair Value Measurements (Fair Value Inputs) (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands | Feb. 24, 2018 | Aug. 26, 2017
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Domestic equity funds | $ 1,580 | $ 1,708
International equity funds | 176 | 174
Fixed income funds | 176 | 259
Interest rate swap contract, assets | 1,924 |
Interest rate swap contract, liabilities |  | 828
Total assets (liabilities) at fair value | 3,856 | 1,313
Fair Value, Inputs, Level 1 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Domestic equity funds | 1,546 | 1,671
International equity funds | 157 | 157
Fixed income funds | 83 | 170
Interest rate swap contract, assets | 0 |
Interest rate swap contract, liabilities |  | 0
Total assets (liabilities) at fair value | 1,786 | 1,998
Fair Value, Inputs, Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Domestic equity funds | 34 | 37
International equity funds | 19 | 17
Fixed income funds | 93 | 89
Interest rate swap contract, assets | 1,924 |
Interest rate swap contract, liabilities |  | 828
Total assets (liabilities) at fair value | 2,070 | (685)
Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Domestic equity funds | 0 | 0
International equity funds | 0 | 0
Fixed income funds | 0 | 0
Interest rate swap contract, assets | 0 |
Interest rate swap contract, liabilities |  | 0
Total assets (liabilities) at fair value | $ 0 | $ 0

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