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Income Taxes (Narrative) (Details) (USD $)
3 Months Ended12 Months Ended
Apr. 01, 2011
Dec. 31, 2010
Sep. 30, 2011
Sep. 24, 2010
Sep. 25, 2009
Apr. 30, 2009
Income Taxes [Abstract]      
Licensing revenue withholding tax remittances  $ 32,200,000$ 31,600,000$ 22,800,000 
Deferred income tax withholding tax foreign earnings  71,400,000   
U.S. income taxes, adjusted for any foreign tax credits, and withholding taxes  20,700,000   
Deferred tax liability related to the amortization of intangible asset 11,000,000    
Deferred tax liability related to amortization of intangible assets  595,00012,281,000  
Net operating loss carryovers for Australia tax purposes  1,200,000   
Net operating loss carryovers for Federal tax purposes  7,200,000  9,700,000
Net operating loss carryovers for California tax purposes  9,600,000  9,600,000
Unrecognized tax benefits, gross300,000 8,683,00016,558,00016,916,000 
Unrecognized tax benefits if recognized, would affect our effective tax rate  3,800,000   
Accrued interest on unrecognized tax benefits  2,000,000900,000  
Accrued penalties on unrecognized tax benefits  2,400,0002,600,000  
Reduction in penalties for current tax provision  200,000   
Increase in interest expense for current tax provision  1,100,000   
Reduction in gross unrecognized tax benefits$ 8,100,000