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Stock-Based Compensation Plans (Expense Components) (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 29, 2015
Aug. 30, 2014
Aug. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 3,097 $ 3,386 $ 3,009
Performance-based annual plan employee award [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense 157 866 1,055
Performance-Based Long-Term Plan Employee Award [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense 360 540 444
Time-based employee award [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense 2,060 1,472 1,145
Time-based directors award [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense 412 410 159
Director stock unit [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 108 $ 98 $ 206