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Taxes (Details 3) (USD $)
12 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Income tax contingency      
Deferred income tax (benefit) expense $ 2,026,000us-gaap_DeferredIncomeTaxExpenseBenefit $ (2,639,000)us-gaap_DeferredIncomeTaxExpenseBenefit $ 6,858,000us-gaap_DeferredIncomeTaxExpenseBenefit
U.S. income tax      
Income tax contingency      
Tax benefit from exercise of non-qualified stock options and stock appreciation rights and vesting of restricted stock and restricted stock units 4,700,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember
12,000,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember
15,100,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember
Foreign income tax      
Income tax contingency      
Tax benefit from exercise of non-qualified stock options and stock appreciation rights and vesting of restricted stock and restricted stock units $ 400,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
$ 800,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
$ 500,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember