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Stock-Based Compensation Stock-Based Compensation Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Feb. 23, 2019
Feb. 24, 2018
Feb. 23, 2019
Feb. 24, 2018
Stockholders' Equity Note [Abstract]        
Stock-based compensation $ 2,100 $ 2,700 $ 4,605 $ 3,553