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Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Jun. 28, 2012 | Sep. 29, 2011 | Jun. 30, 2011
Commitments And Contingencies Disclosure [Abstract] |  |  |
Amount of settlement agreement |  |  | $ 2,600
Accrual for the class action wage and hour lawsuit |  |  | 1,950
Payment to the claims administrator |  | 2,600 |
Reverter payment for unclaimed settlement funds | $ 665 |  |

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