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.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

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Amount of assets acquired at the acquisition date.

+ References

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

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-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

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Acquisitions and Investment - Allocation of Purchase Price and Estimated Useful Life of Assets Acquired (Detail) (USD $) In Thousands, unless otherwise specified					12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Nov. 06, 2012 Phygen, LLC [Member]	Dec. 31, 2013 Developed technology [Member] Phygen, LLC [Member]	Nov. 06, 2012 Developed technology [Member] Phygen, LLC [Member]	Dec. 31, 2013 Trademarks [Member] Phygen, LLC [Member]	Nov. 06, 2012 Trademarks [Member] Phygen, LLC [Member]	Dec. 31, 2013 Covenant not-to-compete [Member] Phygen, LLC [Member]	Nov. 06, 2012 Covenant not-to-compete [Member] Phygen, LLC [Member]	Dec. 31, 2013 Customer-related intangible [Member] Phygen, LLC [Member]	Nov. 06, 2012 Customer-related intangible [Member] Phygen, LLC [Member]	Dec. 31, 2013 Distribution network [Member] Phygen, LLC [Member]	Nov. 06, 2012 Distribution network [Member] Phygen, LLC [Member]
Business Acquisition [Line Items]
Acquired intangibles, Useful lives (in years)					3 years		3 years		3 years		12 years		12 years
Net tangible assets assumed, Estimated Fair Value				$ 1,086
Acquired intangibles, Estimated Fair Value				8,900		176		59		389		5,843		2,413
Goodwill	183,004	180,838	168,609	8,514
Total purchase price allocation				$ 18,480