Business Combinations, Goodwill and Intangible Assets, Net Summary of Intangible Assets Acquired (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Additions to intangible assets related to business combinations	$ 33,800
Developed Technology Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years 10 months 24 days
Additions to intangible assets related to business combinations	$ 33,800

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration