Business Combination, Textuals (Details) (USD $) In Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Business Acquisition [Line Items]
Pro Forma results of operations not presented, impact to results of operations not material					0
Goodwill deductible for income tax purposes	$ 0				$ 0
Acquisition-related costs within operating expenses and cost of revenues	$ 0	[1]	$ 1.5	[1]	$ 9.3	[1]	$ 2.1	[1]

[1] Amount includes acquisition-related costs in operating expenses and in cost of revenues.