Composition Of Certain Financial Statement Captions (Schedule Of Allowance For Doubtful Accounts) (Details) (USD $) In Thousands | 12 Months Ended | ||
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Sep. 30, 2011 | Sep. 24, 2010 | Sep. 25, 2009 | |
| Composition Of Certain Financial Statement Captions [Abstract] | |||
| Balance at Beginning of Fiscal Year | $ 2,040 | $ 2,222 | $ 1,799 |
| Charged to Operations | 772 | 365 | 1,392 |
| Deductions | (346) | (547) | (969) |
| Balance at End of Fiscal Year | $ 2,466 | $ 2,040 | $ 2,222 |
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- Definition Composition Of Certain Financial Statement Captions [Abstract]
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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to costs and expenses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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