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Income Taxes (Details) (USD $)	3 Months Ended
Income Taxes (Details) (USD $)	Mar. 31, 2012
Income Taxes [Abstract]
Material changes to the total amount of unrecognized tax benefits	$ 0
Accrued interest expense	71,000
Gross liability for unrecognized tax benefits	11,086,000
Unrecognized tax benefits that would impact our effective tax rate	7,085,000
Interest included in total liability	3,455,000
Significant increases or decreases for uncertain tax positions	$ 0

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.

+ References+ Details