XML 15 R39.htm IDEA: XBRL DOCUMENT v3.3.0.814
Employee Stock Plans - 2009 Stock Plan (Details) - shares
9 Months Ended
Apr. 23, 2015
Sep. 27, 2015
Dec. 28, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock based award vesting period   4 years  
2009 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Additional shares of common stock reserved for issuance (in shares) 2,500,000    
Shares reserved for issuance (in shares)   9,700,000  
Maximum additional shares (in shares)   10,000,000  
Maximum | 2009 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Equity awards, term period   10 years  
RSUs | 2009 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Additional shares of common stock reserved for issuance (in shares)   2,500,000  
Shares reserved for issuance (in shares)   3,784,000 1,139,000
Periodic Vesting | 2009 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock based award vesting period   1 month  
Periodic Vesting | Stock Options | 2009 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options vesting rate   2.08%  
Initial Vesting | 2009 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock based award vesting period   1 year  
Initial Vesting | Stock Options | 2009 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options vesting rate   25.00%  
Initial Vesting | RSUs | 2009 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options vesting rate   25.00%