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Borrowing Arrangements (Tables) | 6 Months Ended
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Mar. 30, 2012
Debt Disclosure [Abstract] |
Additional Information About The Company's 1.50% Notes | The following tables provide additional information about the Company's 2007 Convertible Notes (in thousands):
| As of
| March 30, 2012 |  | September 30, 2011
Equity component of the convertible notes outstanding | $ | — |  |  | $ | 6,061 |
Principal amount of the convertible notes | $ | — |  |  | $ | 26,677 |
Unamortized discount of the liability component | $ | — |  |  | $ | 588 |
Net carrying amount of the liability component | $ | — |  |  | $ | 26,089 |
Debt Instrument [Line Items] |
Internest Expense on Debt [Table Text Block] |
| Three-months Ended |  | Six-months Ended
| March 30, 2012 |  | April 1, 2011 |  | March 30, 2012 |  | April 1, 2011
Effective interest rate on the liability component | 6.86 | % |  | 6.86 | % |  | 6.86 | % |  | 6.86 | %
Cash interest expense recognized (contractual interest) | $ | 8 |  |  | $ | 100 |  |  | $ | 105 |  |  | $ | 200 |
Effective interest expense recognized | $ | 77 |  |  | $ | 333 |  |  | $ | 428 |  |  | $ | 661 |

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