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Acquisitions - Transaction and Integration Related Costs Expensed (Details) (Gennum [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 28, 2013	Jul. 29, 2012	Jul. 28, 2013	Jul. 29, 2012
Gennum [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Transaction and integration related costs	$ 386	$ 1,763	$ 987	$ 20,389

For transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination, such as related to pre-existing relationships with the acquiree, this element represents the disclosure of the amount of acquisition related costs which have been expensed.

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