Stock-Based Compensation (Stock Option Activity Under The Principal Option Plans) (Details) (Stock Options And Awards [Member], USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 29, 2014	Dec. 29, 2013
Stock Options And Awards [Member]
Number of Options Outstanding (in shares)
Number of Shares, Outstanding at beginning of period	2,450,660
Number of Shares, Granted	210,280
Number of Shares, Exercised	(19,804)
Number of Shares, Forfeited or expired	(125,032)
Number of Shares, Outstanding at end of period	2,516,104	2,450,660
Number of Shares, Vested and expected to vest	2,449,087
Number of Shares, Exercisable	1,988,505
Weighted Average Exercise Price (in US$ per share)
Weighted-Average Exercise Price, Outstanding at beginning of period	$ 17.70
Weighted-Average Exercise Price, Granted	$ 14.80
Weighted-Average Exercise Price, Exercised	$ 10.70
Weighted-Average Exercise Price, Forfeited or expired	$ 16.67
Weighted-Average Exercise Price, Outstanding at end of period	$ 17.56	$ 17.70
Weighted-Average Exercise Price, Vested and expected to vest	$ 17.72
Weighted-Average Exercise Price, Exercisable	$ 19.13
Additional Disclosures [Abstract]
Weighted-Average Remaining Contractual Term, Outstanding at beginning of period in years	4 years 4 months 13 days	4 years 4 months 6 days
Weighted-Average Remaining Contractual Term, Outstanding at end of period in years	4 years 4 months 13 days	4 years 4 months 6 days
Weighted-Average Remaining Contractual Term, Vested and expected to vest in years	4 years 3 months
Weighted-Average Remaining Contractual Term, Exercisable	3 years 3 months
Aggregate Intrinsic Value, Outstanding at beginning of period	$ 4,285
Aggregate Intrinsic Value, Outstanding at end of period	3,141	4,285
Aggregate Intrinsic Value, Vested and expected to vest	2,975
Aggregate Intrinsic Value, Exercisable	$ 1,733