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Restructuring and Related Charges (Detail) (USD $)	3 Months Ended
Restructuring and Related Charges (Detail) (USD $)	Mar. 30, 2013	Mar. 31, 2012	Jun. 30, 2012 Future Lease Obligation [Member]	Dec. 31, 2011 Future Lease Obligation [Member]
Restructuring Charges	$ 260,000	$ 9,000	$ 418,000	$ 499,000

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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