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Share-based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended | 1 Months Ended | 12 Months Ended
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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 |  |  |  |  |  |  |  |

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