Supplemental Financial Information (Details 1) (USD $) In Thousands, unless otherwise specified	Jul. 01, 2012	Dec. 31, 2011
Goodwill
Balance as of December 31, 2011	$ 255,838	$ 72,377
Addition due to Sand Force acquisition	183,461
Balance as of July 1, 2012	$ 255,838	$ 72,377

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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