Preliminary Allocation of Purchase Price for Nimbus Acquisition (Detail) (Nimbus Partners Limited, USD $) In Thousands, unless otherwise specified	Aug. 30, 2011
Nimbus Partners Limited
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Cash	$ 971
Accounts receivable (approximate contractual value)	3,634
Other assets	763
Identifiable intangible assets	19,800
Goodwill	28,194
Liabilities	(6,693)
Deferred income tax liabilities, net	(4,669)
Total preliminary purchase price	$ 42,000

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

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