v2.4.0.8
Income Taxes - Additional Information (Detail) (USD $)
 6 Months Ended 12 Months Ended
Mar. 30, 2013
Sep. 28, 2013
Sep. 29, 2012
Income Taxes [Line Items]      
Valuation allowance   $ 43,354,000 $ 64,337,000
Reversal of income tax reserves   9,100,000  
Decrease in valuation allowance   21,000,000  
Operating losses and credits expiration period   Losses and credits expire between 2014 and 2033  
Gross unrecognized tax benefits, excluding interest   121,800,000 53,100,000
Increase in gross unrecognized tax benefits     68,700,000
Increase in gross unrecognized tax benefits resulted from uncertain tax positions 58,400,000    
Unrecognized tax benefit that would impact effective tax rate   61,000,000  
Interest accrued on unrecognized tax benefits   3,600,000 2,600,000
Income tax penalty accrued   0  
Income tax holiday expiration date   2015  
Unremitted foreign earnings   33,400,000  
Net Operating Losses Carryforwards [Member]
      
Income Taxes [Line Items]      
Amount with unlimited carry forward periods   55,200,000  
Tax Credit Carryforward [Member]
      
Income Taxes [Line Items]      
Amount with unlimited carry forward periods   9,000,000  
Federal net operating loss expected to be expired unutilized   4,500,000  
State net operating loss expected to be expired unutilized   69,300,000  
Foreign net operating loss expected to be expired unutilized   67,500,000  
Minimum [Member]
      
Income Taxes [Line Items]      
Amount of unrecognized tax benefits that are reasonably possible of being reduced in the next twelve months   2,000,000  
Maximum [Member]
      
Income Taxes [Line Items]      
Amount of unrecognized tax benefits that are reasonably possible of being reduced in the next twelve months   4,000,000  
Domestic Tax Authority [Member]
      
Income Taxes [Line Items]      
Federal net operating losses   24,400,000  
Federal credit carry forwards   900,000  
State and Local Jurisdiction [Member]
      
Income Taxes [Line Items]      
Federal net operating losses   41,200,000  
Federal credit carry forwards   12,800,000  
Foreign Tax Authority [Member]
      
Income Taxes [Line Items]      
Federal net operating losses   55,200,000  
Federal credit carry forwards   $ 1,900,000