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Restructuring (narrative) (detail) (USD $)	3 Months Ended
Restructuring (narrative) (detail) (USD $)	Jun. 29, 2013	Dec. 29, 2012	Jun. 30, 2012
Restructuring Charges [Abstract]
Plant Restructuring	$ 154,000	$ 2,510,000	$ 0

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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