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Intangible Assets (Details Textual) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended
Intangible Assets (Details Textual) (USD $)	Sep. 29, 2012	Sep. 24, 2011	Sep. 29, 2012	Sep. 24, 2011	Mar. 31, 2012 Core Developed Technologies [Member]
Intangible Assets (Textual) [Abstract]
In-process technology					$ 16,300,000
Useful life (in years)					5 years
Amortization expense	$ 4,600,000	$ 5,400,000	$ 13,107,000	$ 13,526,000

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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