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Restructuring Charges (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended					12 Months Ended
	Sep. 30, 2012 Employee	Dec. 31, 2011 Employee	Apr. 02, 2011	Jan. 01, 2011	Jul. 03, 2010 Employee	Mar. 31, 2012	Apr. 02, 2011	Apr. 03, 2010
Restructuring charges (Textual) [Abstract]
Reduction in number of global workforce	46	56			200
Percentage reduction in global workforce	2.00%
Restructuring charges	$ 3,400		$ 6,070	$ 4,276		$ 3,369	$ 10,346	$ 30,064

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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