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Earnings Per Share (Calculation of Basic and Diluted Income Per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Aug. 29, 2015
May. 30, 2015
Feb. 28, 2015
Nov. 29, 2014
Aug. 30, 2014
May. 31, 2014
Mar. 01, 2014
Nov. 30, 2013
Aug. 29, 2015
Aug. 30, 2014
Aug. 31, 2013
Earnings Per Share [Abstract]                      
Net income $ 11,717 $ 11,502 $ 8,096 $ 9,895 $ 12,929 $ 11,385 $ 9,593 $ 11,146 $ 41,210 $ 45,053 $ 31,953
Weighted average shares outstanding                 26,941 27,430 28,075
Net income per share - basic (in dollars per share) $ 0.43 $ 0.43 $ 0.30 $ 0.37 $ 0.48 $ 0.42 $ 0.35 $ 0.40 $ 1.53 $ 1.64 $ 1.14
Dilutive impact of awards and options outstanding                 110 115 95
Weighted average shares and potential dilutive shares outstanding                 27,051 27,545 28,170
Net income per share - assuming dilution (in dollars per share) $ 0.43 $ 0.43 $ 0.30 $ 0.37 $ 0.48 $ 0.42 $ 0.35 $ 0.40 $ 1.52 $ 1.64 $ 1.13