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Fair Value Measurements - Schedule of Estimated Fair Value of Intangible Assets, goodwill and Cost Method Equity Investment Measured on Nonrecurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||
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Sep. 28, 2013
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Sep. 29, 2012
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Sep. 28, 2013
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Sep. 29, 2012
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Sep. 24, 2011
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| Fair Value Measurements Of Financial Instruments [Line Items] | |||||
| Goodwill, Total Gains (Losses) | $ (1,100,000) | $ (5,800) | $ (1,117,369) | $ (5,826) | |
| Equipment, Total Gains (Losses) | (4,993) | (6,452) | |||
| Cost-method equity investment, Total Gains (Losses) | (6,438) | (2,445) | |||
| Total Gains (Losses) | (1,128,800) | (12,278) | |||
| Goodwill | 277,840 | 277,840 | |||
| Equipment | 1,363 | 1,363 | |||
| Cost-method equity investments | 1,483 | 1,483 | 345 | ||
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Quoted Prices in Active Market for Identical Assets (Level 1) [Member]
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| Fair Value Measurements Of Financial Instruments [Line Items] | |||||
| Goodwill | |||||
| Equipment | |||||
| Cost-method equity investments | |||||
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Significant Other Observable Inputs (Level 2) [Member]
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| Fair Value Measurements Of Financial Instruments [Line Items] | |||||
| Goodwill | |||||
| Equipment | |||||
| Cost-method equity investments | |||||
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Significant Unobservable Inputs (Level 3) [Member]
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| Fair Value Measurements Of Financial Instruments [Line Items] | |||||
| Goodwill | 277,840 | 277,840 | |||
| Equipment | 1,363 | 1,363 | |||
| Cost-method equity investments | $ 1,483 | $ 1,483 | $ 345 | ||