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Restructuring and Related Charges (Detail) (USD $)	9 Months Ended		3 Months Ended
Restructuring and Related Charges (Detail) (USD $)	Sep. 29, 2012	Oct. 01, 2011	Jun. 30, 2012 Future Lease Obligation [Member]	Dec. 31, 2011 Future Lease Obligation [Member]
Restructuring Charges	$ 395,000	$ (253,000)	$ 418,000	$ 499,000
Percentage Usage, Leased Facility	50.00%

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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