Financial Statement Details (Details) (USD $) In Thousands, unless otherwise specified	Dec. 30, 2011	Dec. 31, 2010
Financial statement details [Abstract]
Finished goods	$ 18,768	$ 16,351
Work in progress	5,650	6,896
Raw materials and supplies	12,550	12,494
Total inventory	36,968	35,741
Land	745	1,765
Buildings and improvements	11,658	19,218
Machinery and equipment	85,045	92,154
Total property, plant and equipment	97,448	113,137
Income taxes payable	4,967	14,828
Accrued compensation	10,553	13,054
Accrued restructuring costs	4,157	608
Other accrued expenses	23,178	26,112
Total accrued expenses and other current liabilities	$ 42,855	$ 54,602