Income Taxes (Narrative) (Details) (USD $)	3 Months Ended
Mar. 31, 2012
Income Taxes [Abstract]
Deferred income tax liabilities associated with change in management's plans	$ 2,800,000
Unrecognized tax benefits	18,000,000
Unrecognized tax benefits that would impact effective tax rate	12,700,000
Unrecognized tax benefits excluding interest and penalties	2,700,000
Accrued income tax-related interest expense	2,600,000
Penalties accrued	0
Total amount of accrued income tax-related interest	$ 200,000

This element represents the amount of statutory penalties accrued as of the date of the statement of financial position for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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This element represents the amount of interest expense accrued as of the date of the statement of financial position for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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- Definition

This element represents interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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