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Goodwill And Intangible Assets (Tables) | 12 Months Ended
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Sep. 30, 2011
Goodwill and Intangible Assets Disclosure [Abstract] |
ScheduleofIntangibleAssetsExcludingGoodwillTextBlock [Table Text Block] | Intangible assets consist of the following (in thousands):
|  | As of |  | As of
| Weighted Average Amortization Period Remaining (Years) | September 30, 2011 |  | October 1, 2010
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Amortizing intangible assets |  |  |  |  |  |  |  |  |  |  |  |
Developed technology | 1.9 | $ | 20,660 |  |  | $ | (13,751 | ) |  | $ | 6,909 |  |  | $ | 14,150 |  |  | $ | (10,862 | ) |  | $ | 3,288 |
Customer relationships | 3.6 | 57,510 |  |  | (21,828 | ) |  | 35,682 |  |  | 21,510 |  |  | (15,894 | ) |  | 5,616 |
Patents and other | 4.0 | 53,896 |  |  | (13,548 | ) |  | 40,348 |  |  | 5,966 |  |  | (5,630 | ) |  | 336 |
Total amortizing intangibles |  | 132,066 |  |  | (49,127 | ) |  | 82,939 |  |  | 41,626 |  |  | (32,386 | ) |  | 9,240 |
Nonamortizing intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks |  | 3,869 |  |  | — |  |  | 3,869 |  |  | 3,269 |  |  | — |  |  | 3,269 |
Total intangible assets |  | $ | 135,935 |  |  | $ | (49,127 | ) |  | $ | 86,808 |  |  | $ | 44,895 |  |  | $ | (32,386 | ) |  | $ | 12,509 |
ChangesinGrossCarryingAmountofGoodwillandIntangibleAssetsTextBlock [Table Text Block] | The changes in the gross carrying amount of goodwill and intangible assets are as follows (in thousands):
| Goodwill |  | Developed Technology |  | Customer Relationships |  | Patents and Other |  | Nonamortizing Trademarks |  | Total
Balance as of October 2, 2009 | $ | 482,893 |  |  | $ | 13,750 |  |  | $ | 21,510 |  |  | $ | 5,966 |  |  | $ | 3,269 |  |  | $ | 527,388 |
Additions during period | 2,731 |  |  | 400 |  |  | — |  |  | — |  |  | — |  |  | 3,131 |
Deductions during year | (37 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | (37 | )
Balance as of October 1, 2010 | 485,587 |  |  | 14,150 |  |  | 21,510 |  |  | 5,966 |  |  | 3,269 |  |  | 530,482 |
Additions during period | 177,529 |  |  | 6,510 |  |  | 36,000 |  |  | 47,930 |  |  | 600 |  |  | 268,569 |
Deductions during year | (75 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | (75 | )
Balance as of September 30, 2011 | $ | 663,041 |  |  | $ | 20,660 |  |  | $ | 57,510 |  |  | $ | 53,896 |  |  | $ | 3,869 |  |  | $ | 798,976 |
Schedule Of Expected Annual Amortization Expense Related To Intangible Assets For The Next Five Years | Annual amortization expense for the next five years related to intangible assets is expected to be as follows (in thousands):
| 2012 |  | 2013 |  | 2014 |  | 2015 |  | 2016
Amortization expense | $ | 25,599 |  |  | $ | 19,810 |  |  | $ | 15,211 |  |  | $ | 13,172 |  |  | $ | 9,147 |

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- Definition Tabular disclosure of the estimated aggregate amortization expense for intangible assets subject to amortization for each of the five succeeding fiscal years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 350 -SubTopic 30 -Publisher FASB -Number -Article -Subparagraph (a) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275 + Details
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