Share-based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended				1 Months Ended		12 Months Ended
	Aug. 25, 2012	Aug. 25, 2012 Stock Options [Member]	Aug. 27, 2011 Restricted Stock Awards, Non-Employee [Member]	Aug. 25, 2012 Unrestricted Stock, Non-Employee [Member]	Apr. 05, 2010 Performance Restricted Stock Awards [Member]	Apr. 05, 2010 Restricted Stock Awards, CEO [Member]	Aug. 25, 2012 Restricted Stock Awards, CEO [Member]	Aug. 25, 2012 Stock Appreciation Rights (SARs) [Member]	Aug. 25, 2012 Share-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award, vesting period (in years)		5Y	1Y		4Y	6Y			5Y
Number of shares granted during the period (in shares)			6,000	3,153	350,000	50,000		8,620
Compensation expense for all share-based compensation for the next five fiscal years [Abstract]
2013	$ 5,347						$ 4,066		$ 1,281
2014	3,729						2,725		1,004
2015	2,378						1,697		681
2016	1,040						680		360
2017	47						0		47
Total	12,541						9,168		3,373
Weighted average period for compensation cost to be recognized related to non-vested awards (in years)							2.1		2.5
Total compensation cost not yet recognized related to non-vested awards									$ 12,500
Summary of common stock option activity [Roll Forward]
Number of shares outstanding, beginning of period (in shares)	527,400
Number of shares granted (in shares)	120,120
Number of shares exercised (in shares)	(73,250)
Number of shares forfeited (in shares)	(14,000)
Number of shares outstanding, end of period (in shares)	560,270
Number of shares, exercisable, end of period (in shares)	113,570
Weighted average exercise price, outstanding, beginning of period (in dollars per share)	$ 38.48
Weighted average exercise price, granted (in dollars per share)	$ 50.55
Weighted average exercise price, exercised (in dollars per share)	$ 32.91
Weighted average exercise price, forfeited (in dollars per share)	$ 40.59
Weighted average exercise price, outstanding, end of period (in dollars per share)	$ 41.74
Weighted average exercise price, exercisable, end of period (in dollars per share)	$ 40.43