Preliminary Allocation of Purchase Price for LogLogic Acquisition (Detail) (LogLogic, Inc, USD $) In Thousands, unless otherwise specified	Apr. 10, 2012
LogLogic, Inc
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Cash	$ 5,018
Accounts receivable (approximate contractual value)	5,359
Other assets	1,524
Identifiable intangible assets	61,200
Goodwill	73,189
Liabilities	(7,006)
Deferred Revenue	(7,297)
Deferred income tax asset, net	4,642
Total preliminary purchase price	$ 136,629

Business Acquisition, Purchase Price Allocation, Deferred Revenue

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Amount of cash paid to acquire the entity.

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The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

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The amount of cash and cash equivalents acquired in a business combination.

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The amount of acquisition cost of a business combination allocated to receivables.

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Amount of acquisition cost of a business combination allocated to noncurrent deferred tax assets net of valuation allowance and noncurrent deferred tax liabilities.

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Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

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The amount of acquisition cost of a business combination allocated to liabilities assumed.

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Amount of acquisition cost of a business combination allocated to other assets not separately disclosed in the balance sheet.

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