Long-lived Assets (Details) (USD $) In Thousands, unless otherwise specified	Jun. 29, 2013	Dec. 29, 2012
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Net, Excludes Construction in Progress Gross	$ 267,083	$ 259,236
Less: Accumulated depreciation, amortization and enterprise-wide impairment	(231,571)	(227,126)
Property Plant And Equipment Net, Excludes Construction in Progress	35,512	32,110
Construction in Progress, Gross	4,118	13,405
Property, Plant and Equipment, Net	39,630	45,515
Building [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Net, Excludes Construction in Progress Gross	790	790
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Net, Excludes Construction in Progress Gross	149,736	140,320
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Net, Excludes Construction in Progress Gross	38,050	38,092
Assets Held under Capital Leases [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Net, Excludes Construction in Progress Gross	2,525	2,367
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Net, Excludes Construction in Progress Gross	5,990	6,249
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Net, Excludes Construction in Progress Gross	$ 69,992	$ 71,418