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Stock-Based Compensation (Details 3) (USD $)
12 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Stock-based compensation costs      
Share based compensation cost before tax $ 39,067,000us-gaap_AllocatedShareBasedCompensationExpense $ 30,800,000us-gaap_AllocatedShareBasedCompensationExpense $ 31,176,000us-gaap_AllocatedShareBasedCompensationExpense
Income tax benefit 4,024,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense 2,633,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense 4,911,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
Share based compensation cost after tax 35,043,000us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax 28,167,000us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax 26,265,000us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax
Total unrecognized compensation costs related to awards 51,200,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized    
Cost of revenues      
Stock-based compensation costs      
Share based compensation cost before tax 775,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
952,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
1,206,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
Research and development      
Stock-based compensation costs      
Share based compensation cost before tax 18,521,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember
14,530,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember
12,602,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember
Selling, general and administrative      
Stock-based compensation costs      
Share based compensation cost before tax $ 19,771,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
$ 15,318,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
$ 17,368,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember