Stock-Based Compensation (Stock Option Activity Under The Principal Option Plans) (Details) (Stock Options And Awards, USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013
Stock Options And Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Outstanding at beginning of period	2,450,660
Number of Shares, Granted	212,080
Number of Shares, Exercised	(69,836)
Number of Shares, Forfeited or expired	(243,457)
Number of Shares, Outstanding at end of period	2,349,447	2,450,660
Number of Shares, Vested and expected to vest	2,312,566
Number of Shares, Exercisable	1,932,834
Weighted-Average Exercise Price, Outstanding at beginning of period	$ 17.70
Weighted-Average Exercise Price, Granted	$ 14.78
Weighted-Average Exercise Price, Exercised	$ 9.05
Weighted-Average Exercise Price, Forfeited or expired	$ 16.93
Weighted-Average Exercise Price, Outstanding at end of period	$ 17.77	$ 17.70
Weighted-Average Exercise Price, Vested and expected to vest	$ 17.85
Weighted-Average Exercise Price, Exercisable	$ 18.89
Weighted-Average Remaining Contractual Term, Outstanding at beginning of period in years	3 years 11 months 23 days	4 years 4 months 6 days
Weighted-Average Remaining Contractual Term, Outstanding at end of period in years	3 years 11 months 23 days	4 years 4 months 6 days
Weighted-Average Remaining Contractual Term, Vested and expected to vest in years	3 years 10 months 24 days
Weighted-Average Remaining Contractual Term, Exercisable in years	3 years 0 months 7 days
Aggregate Intrinsic Value, Outstanding at beginning of period	$ 4,285
Aggregate Intrinsic Value, Outstanding at end of period	2,716	4,285
Aggregate Intrinsic Value, Vested and expected to vest	2,642
Aggregate Intrinsic Value, Exercisable	$ 1,971