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Purchase Price Allocation Based on Fair Value of Assets Acquired and Liabilities Assumed, Third Pillar Systems Inc. (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011	Aug. 30, 2013 Third Pillar System Inc
Business Acquisition [Line Items]
Cash consideration				$ 2,500
Recognized amounts of identifiable assets acquired and liabilities assumed
Current assets				375
Intangible assets				298
Other non-current assets				24
Current liabilities				(200)
Total identifiable net assets acquired				497
Goodwill	950,424	956,064	925,339	2,003
Total				$ 2,500

X

- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed. It does not include the direct cost of acquisition.

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The amount of acquisition cost of a business combination allocated to current assets excluding cash and cash equivalent.

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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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The amount of identifiable intangible assets recognized as of 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 of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at 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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