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

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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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.

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Purchase Price Allocation Related to Acquired Assets and Useful Life (Detail) (USD $) In Thousands, unless otherwise specified				1 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Jan. 31, 2014 Quiterian S.L.	Jan. 31, 2014 Existing technology Quiterian S.L.	Jan. 31, 2014 Customer contracts and relationships Quiterian S.L.
Business Acquisition [Line Items]
Net tangible assets and liabilities			$ (2,555)
Purchase price allocated to intangible assets				2,722	1,769
Goodwill	55,936	51,962	4,582
Total purchase price allocation			$ 6,518
Weighted Average Useful life				7 years	7 years