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 asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

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Amount of deferred revenue expected to be recognized as such within one year or the normal operating cycle, if longer, assumed at the acquisition date.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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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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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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Business Combinations - Spend Radar (Schedule of Purchase Price Allocation) (Detail) (USD $) In Thousands, unless otherwise specified			1 Months Ended		1 Months Ended		1 Months Ended		1 Months Ended		1 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Oct. 31, 2012 Spend Radar	Oct. 01, 2012 Spend Radar	Oct. 31, 2012 Spend Radar Covenant Not to Compete	Oct. 01, 2012 Spend Radar Covenant Not to Compete	Oct. 31, 2012 Spend Radar Trademarks	Oct. 01, 2012 Spend Radar Trademarks	Oct. 31, 2012 Spend Radar Acquired Technology	Oct. 01, 2012 Spend Radar Acquired Technology	Oct. 31, 2012 Spend Radar Customer Relationships	Oct. 01, 2012 Spend Radar Customer Relationships
Business Acquisition [Line Items]
Accounts receivable				$ 634
Prepaid expenses and other current assets				100
Property and equipment				147
Amortizable intangible assets						203		566		2,693		1,338
Goodwill	64,732	65,280		5,682
Accrued expenses				(305)
Deferred revenues				(1,230)
Total purchase consideration			$ 9,828
Estimated useful life					5 years		5 years		7 years		5 years