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Acquisitions (Schedule of Purchase Price Allocation) (Details) (Apex Systems, USD $) In Thousands, unless otherwise specified	May 15, 2012
Apex Systems
Business Acquisition [Line Items]
Current assets	$ 169,844
Property and equipment	902
Goodwill	266,788
Identifiable intangible assets	251,555
Other	494
Total assets acquired	689,583
Current liabilities	77,905
Other	850
Total liabilities assumed	78,755
Total purchase price	$ 610,828

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The amount of acquisition cost of a business combination allocated to assets acquired.

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The total purchase price of the acquired entity. This includes cash paid to equity interest holders of the acquired entity, fair value of debt and equity securities issued to equity holders of the acquired entity, and transaction costs paid to third parties to consummate the acquisition.

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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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