Weighted Average Assumptions Utilized to Value Stock Options (Detail) (USD $)
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3 Months Ended | 9 Months Ended | ||
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Jun. 23, 2012
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Jun. 25, 2011
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Jun. 23, 2012
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Jun. 25, 2011
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Risk-free interest rate | 0.70% | 1.00% | 0.70% | 1.00% |
Expected volatility | 47.00% | 45.00% | 47.00% | 45.00% |
Expected life (in years) | 4 years 3 months 18 days | 4 years 3 months 18 days | 4 years 3 months 18 days | 4 years 2 months 12 days |
Dividend yield | ||||
Weighted average fair value of options granted | $ 7.10 | $ 7.96 | $ 6.43 | $ 6.23 |
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- Definition
Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Disclosure of the weighted average expected dividend for an entity using a valuation technique with different dividend rates during the contractual term. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The range of expected volatilities used and the weighted-average expected volatility for an entity using a valuation technique with different volatilities during the contractual term. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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