Business Segment, Geographic And Concentration Risk Information (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 29, 2012	Dec. 30, 2011
Segment Reporting, Asset Reconciling Item [Line Items]
Property, plant and equipment, net	$ 156,380	$ 145,806
United States [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Property, plant and equipment, net	123,362	113,693
Rest Of World [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Property, plant and equipment, net	$ 33,018	$ 32,113

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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