Stock-Based Compensation (Stock Option Activity Under The Principal Option Plans) (Details) - Stock Options And Awards - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 27, 2016	Dec. 27, 2015
Number of Options Outstanding (in shares)
Number of shares, outstanding at beginning of period (shares)	2,265,992
Number of shares, granted (shares)	16,200
Number of shares, exercised (shares)	(35,943)
Number of shares, forfeited or expired (shares)	(153,481)
Number of shares, outstanding at end of period (shares)	2,092,768	2,265,992
Number of shares, vested and expected to vest (shares)	2,040,374
Number of shares, exercisable (shares)	1,744,174
Weighted average exercise price
Weighted-average exercise price, outstanding at beginning of period (USD per share)	$ 16.59
Weighted-average exercise price, granted (USD per share)	6.04
Weighted-average exercise price, exercised (USD per share)	7.80
Weighted-average exercise price, forfeited or expired (USD per share)	20.67
Weighted-average exercise price, outstanding at end of period (USD per share)	16.36	$ 16.59
Weighted-average exercise price, vested and expected to vest (USD per share)	16.50
Weighted-average exercise price, exercisable (USD per share)	$ 17.38
Additional Disclosures [Abstract]
Weighted-average remaining contractual term, outstanding at beginning of period in years	4 years 1 month 10 days	4 years 5 months 27 days
Weighted-average remaining contractual term, vested and expected to vest in years	3 years 11 months 28 days
Weighted-average remaining contractual term, exercisable	3 years 2 months 1 day
Aggregate intrinsic value, outstanding at beginning of period	$ 19
Aggregate intrinsic value, outstanding at end of period	1,053	$ 19
Aggregate intrinsic value, vested and expected to vest	984
Aggregate intrinsic value, exercisable	$ 623