The charge against earnings in the period, comprised of costs incurred associated with an exit or disposal activity other than for a discontinued operations as defined under generally accepted accounting principles. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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Restructuring And Other Impairment Charges (Narrative) (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jun. 26, 2011	Jul. 01, 2012 Facility	Jun. 26, 2011
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 1,875,000
Number of facilities under restructuring program			3
Asset impairment charges	0	0	0	0
Impairment charges	3,100,000
2012 Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	265,000		871,000
Contract Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			2,023,000
Contract Termination Costs [Member] \| 2012 Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Facility closure costs			2,700,000
Termination Of European Distributor Agreements [Member] \| 2012 Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 300,000		$ 900,000