XML 28 R47.htm IDEA: XBRL DOCUMENT v2.4.1.9
Stock Based Compensation (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Apr. 04, 2015
Mar. 29, 2014
Share-based compensation expense and allocation by cost [Line Items]    
Share-based Compensation $ 21,861us-gaap_ShareBasedCompensation $ 18,864us-gaap_ShareBasedCompensation
Cost of product and maintenance    
Share-based compensation expense and allocation by cost [Line Items]    
Share-based Compensation 569us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember		 482us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
Cost of services    
Share-based compensation expense and allocation by cost [Line Items]    
Share-based Compensation 832us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= cdns_CostOfServicesMember		 703us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= cdns_CostOfServicesMember
Marketing and sales    
Share-based compensation expense and allocation by cost [Line Items]    
Share-based Compensation 5,447us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingAndMarketingExpenseMember		 4,596us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingAndMarketingExpenseMember
Research and development    
Share-based compensation expense and allocation by cost [Line Items]    
Share-based Compensation 11,377us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember		 9,667us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember
General and administrative    
Share-based compensation expense and allocation by cost [Line Items]    
Share-based Compensation $ 3,636us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember		 $ 3,416us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember