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Summary of Interim Financial Information (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2013	Dec. 30, 2012	Sep. 30, 2012	Jul. 01, 2012	Mar. 31, 2012	Jan. 01, 2012	Oct. 02, 2011	Jul. 03, 2011	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Quarterly Financial Information [Line Items]
Restructuring charges	$ 1,723	$ 3,776	$ 1,295	$ 370	$ 2,236	$ 1,440	$ 902	$ 410	$ 7,164	$ 4,988	$ 6,813
Legal proceedings settlement income							$ 900			$ 900

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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