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, and direct costs of the acquisition.

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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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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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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The net result for the period of deducting operating expenses from operating revenues.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Acquisition of Cyrus Networks, LLC (Details) (USD $) In Millions, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jun. 11, 2010
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Goodwill Amount					$ 269.9
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets					138.0
Revenue, Net	367.5	338.6	728.3	662.3
Operating Income (Loss)	77.6	69.8	164.0	152.2
Business Acquisition, Pro Forma Information [Abstract]
Revenue		352.8		693.9
Net income		11.3		28.0
Basic earnings per common share		$ 0.04		$ 0.11
Diluted earnings per common share		$ 0.04		$ 0.11
Cyrus Networks [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price					526
Revenue, Net	22.7		44.8
Operating Income (Loss)	$ 6.5		$ 12.5