Earnings Per Share (Calculation of Basic and Diluted Income Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 27, 2016	Feb. 28, 2015	Feb. 27, 2016	Feb. 28, 2015
Earnings Per Share [Abstract]
Net income	$ 9,354	$ 8,096	$ 17,912	$ 17,991
Weighted average shares outstanding	26,936	26,924	26,956	26,946
Net income per share - basic (in dollars per share)	$ 0.35	$ 0.30	$ 0.66	$ 0.67
Dilutive impact of awards and options outstanding	79	94	86	102
Weighted average shares and potential dilutive shares outstanding	27,015	27,018	27,042	27,048
Net income per share - assuming dilution (in dollars per share)	$ 0.35	$ 0.30	$ 0.66	$ 0.67