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Schedule II-Valuation and Qualifying Accounts (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Oct. 01, 2011
Allowance for doubtful accounts [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning of period $ 937 $ 2,194 $ 980
Charged to Costs and Expenses (371) (1,239) 1,219
Other Additions 0 0 0
Other Deductions (62) [1] (18) [1] (5) [1]
End of period 504 937 2,194
Inventory reserve [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning of period 18,617 15,099 10,140
Charged to Costs and Expenses 3,561 6,060 6,701
Other Additions 0 0 0
Other Deductions (8,058) [2] (2,542) [2] (1,742) [2]
End of period 14,120 18,617 15,099
Valuation allowance for deferred taxes [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning of period 25,015 23,777 27,856
Charged to Costs and Expenses 1,429 [3] 1,261 (1,980) [3]
Other Additions 0 0 (2,099) [4]
Other Deductions 0 (23) 0
End of period $ 26,444 $ 25,015 $ 23,777
[1] Represents write-offs of specific accounts receivable.
[2] Sale or scrap of previously reserved inventory.
[3] Reflects increase/decrease in the valuation allowance primarily associated with the Company's U.S. and foreign net operating losses and other deferred tax assets.
[4] Release of valuation allowance related to prior stock option exercises recorded to additional paid in capital.