Net Income Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Nov. 29, 2014	Nov. 30, 2013
Net Income Per Share [Abstract]
Net income as reported	$ 57,417us-gaap_NetIncomeLoss	$ 59,046us-gaap_NetIncomeLoss
Less: Distributed net income available to participating securities	(1,238)	(132)
Less: Undistributed net income available to participating securities		(293)
Undistributed and distributed net income available to common shareholders, basic	56,179	58,621
Add: Undistributed net income allocated to participating securities		293
Less: Undistributed net income reallocated to participating securities		(292)
Undistributed and distributed net income available to common shareholders, diluted	$ 56,179	$ 58,622
Weighted average shares outstanding for basic net income per share	61,246	62,773
Effect of dilutive securities	296	305
Weighted average shares outstanding for diluted net income per share	61,542	63,078
Net income per share, Basic	$ 0.92us-gaap_EarningsPerShareBasic	$ 0.93us-gaap_EarningsPerShareBasic
Net income per share, Diluted	$ 0.91us-gaap_EarningsPerShareDiluted	$ 0.93us-gaap_EarningsPerShareDiluted
Antidilutive stock options	0	399

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Undistributed Net Income Reallocated To Participating Securities

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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Earnings allocated (not distributed) to participating securities under the two-class method to the extent that participating securities may share in earnings as if all of the earnings for the period had been distributed.

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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