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Shareholders' Equity - Additional Information (Detail) (USD $)
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12 Months Ended | 12 Months Ended | |||||||||||
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Sep. 27, 2014
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Sep. 28, 2013
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Sep. 29, 2012
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Sep. 27, 2014
Common Stock [Member]
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Jun. 25, 2011
Common Stock [Member]
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Sep. 27, 2014
Class A Common Stock [Member]
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Sep. 28, 2013
Class A Common Stock [Member]
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Sep. 29, 2012
Class A Common Stock [Member]
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Sep. 27, 2014
Class B Stock [Member]
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Sep. 28, 2013
Class B Stock [Member]
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Sep. 29, 2012
Class B Stock [Member]
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Sep. 27, 2014
Maximum [Member]
Class B Stock [Member]
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Sep. 27, 2014
Minimum [Member]
Class B Stock [Member]
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| Class of Stock [Line Items] | |||||||||||||
| Common stock authorized | 80,000,000 | 100,000,000 | 3,000,000 | 3,000,000 | |||||||||
| Common stock, par value | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | |||||||||
| Common stock, shares outstanding | 12,437,307 | 36,887,311 | 1,652,262 | 1,652,262 | |||||||||
| Number of voting powers | 10 | 1 | |||||||||||
| Percentage of vote cast for shares | 49.00% | ||||||||||||
| Convertible shares conversion ratio | 1 | ||||||||||||
| Authorized amount to repurchase stock | $ 100,000,000 | ||||||||||||
| Repurchase of common stock, shares | 300 | 165,900 | 1,904,700 | 0 | 0 | ||||||||
| Repurchase of common stock | 2,000 | 1,503,000 | 20,884,000 | 0 | 1,000 | 19,000 | 0 | 0 | 0 | ||||
| Aggregate stock repurchased shares | 6,300,000 | ||||||||||||
| Aggregate stock repurchased value | $ 49,900,000 | ||||||||||||
| X | ||||||||||
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- Definition
Aggregate stock repurchased shares. No definition available.
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| X | ||||||||||
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- Definition
Aggregate stock repurchased value. No definition available.
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| X | ||||||||||
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- Definition
Convertible shares conversion ratio. No definition available.
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| X | ||||||||||
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- Definition
Number of votes entitled per share. No definition available.
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| X | ||||||||||
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- Definition
Percentage of vote cast for shares. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Face amount or stated value per share of common stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of stock repurchase plan authorized. No definition available.
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