Restructuring Related and Impairment Charges (Schedule of Restructuring Reserve by Type of Cost) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Restructuring Reserve [Roll Forward]
Restructuring reserve at beginning of period	$ 1,099	$ 2,632	$ 5,958
Restructuring charges	1,791	3,261	3,902
Cash payments	(2,680)	(4,794)	(7,228)
Restructuring reserve at end of period	210	1,099	2,632
Severance Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve at beginning of period	1,068	2,389	4,389
Restructuring charges	(316)	636	1,768
Cash payments	(560)	(1,957)	(3,768)
Restructuring reserve at end of period	192	1,068	2,389
Facility Termination & Other Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve at beginning of period	31	243	1,569
Restructuring charges	2,107	2,625	2,134
Cash payments	(2,120)	(2,837)	(3,460)
Restructuring reserve at end of period	$ 18	$ 31	$ 243