Stock-based Compensation (Summary Of Stock Option Activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended |
Sep. 28, 2014 | Oct. 04, 2015 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | |
Options, Granted | 0 | |
Stock Options [Member] | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | |
Options, Balance, January 5, 2015 | | 1,021 |
Options, Granted | | 39 |
Options, Exercised | | (8) |
Options, Canceled | | (79) |
Options, Balance, October 4, 2015 | | 973 |
Options, Vested and expected to vest at October 4, 2015 | | 956 |
Options, Exercisable, October 4, 2015 | | 817 |
Options, Weighted Average Exercise Price, Balance, January 5, 2015 | | $ 39.56 |
Options, Weighted Average Exercise Price, Granted | | 28.31 |
Options, Weighted Average Exercise Price, Exercised | | 31.76 |
Options, Weighted Average Exercise Price, Canceled | | 49.25 |
Options, Weighted Average Exercise Price, Balance, October 4, 2015 | | 38.37 |
Options, Weighted Average Exercise Price, Vested and expected to vest at October 4, 2015 | | 38.50 |
Options, Weighted Average Exercise Price, Exercisable, October 4, 2015 | | $ 39.66 |
Options, Weighted Average Remaining Contractual Term (in years), Balance, October 4, 2015 | | 5 years 7 months 13 days |
Options, Weighted Average Remaining Contractual Term (in years), Vested and expected to vest at October 4,2015 | | 5 years 6 months 26 days |
Options, Weighted Average Remaining Contractual Term (in years), Exercisable, October 4, 2015 | | 5 years 2 months 1 day |
Options, Aggregate Intrinsic Value, Balance, October 4, 2015 | | $ 901 |
Options, Aggregate Intrinsic Value, Vested and expected to vest at October 4, 2015 | | 879 |
Options, Aggregate Intrinsic Value, Exercisable, October 4, 2015 | | $ 739 |