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Subsequent Event	12 Months Ended
	Dec. 31, 2011
Subsequent Event
Subsequent Event	19. Subsequent Event         On February 3, 2012, the Company completed its acquisition of a privately-held company, Unity Semiconductor Corporation ("Unity"), by acquiring all issued and outstanding common shares of Unity. Pursuant to the merger agreement on February 3, 2012, a merger sub merged with and into Unity as the surviving corporation and a wholly owned subsidiary. Under the terms of the merger agreement, the Company paid approximately $35.0 million in cash, subject to certain adjustments. Of the consideration, approximately $5.3 million in cash was deposited into an escrow account until August 3, 2013, subject to any claims, to fund any indemnification obligations to the Company following the consummation of the merger. The Company acquired Unity's technology and a portfolio of memory semiconductor patents, which have applications, among other things. The Company incurred approximately $0.6 million in direct acquisition costs which were expensed as incurred.         As part of the acquisition, the Company agreed to pay $5.0 million in retention bonuses to certain Unity employees and contractors. The retention bonus payouts are subject to the condition of employment, and therefore, will be treated as compensation and will be recorded as compensation expenses as incurred.         The acquisition will be accounted for using the purchase method of accounting in accordance with the business acquisition guidance. Under the purchase accounting method, the total estimated purchase consideration of the acquisition will be allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their relative fair values. The excess of the purchase consideration over the net tangible and identifiable intangible assets acquired and liabilities will be recorded as goodwill. Due to the timing of the acquisition, the allocation of the purchase price has not been finalized.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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