Stock Plans (Summary of Total Compensation Recognized Related to Outstanding Stock Options) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Jan. 01, 2017 |
Jan. 03, 2016 |
Dec. 28, 2014 |
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Total stock-based compensation expense | $ 17,158 | $ 17,278 | $ 14,057 |
Cost of sales [Member] | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Total stock-based compensation expense | 1,031 | 1,272 | 1,380 |
Research and development expenses [Member ] | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Total stock-based compensation expense | 902 | 526 | 484 |
Selling, general and administrative and other expenses [Member] | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Total stock-based compensation expense | $ 15,225 | $ 15,480 | $ 12,193 |