Income Taxes (Details) (USD $) In Millions	3 Months Ended
Mar. 31, 2011	Jun. 30, 2011	Dec. 31, 2010
Income Taxes
Uncertain tax positions		$ 1.2	$ 1.0
Accrued interest and penalties related to tax positions		0.1	0.1
Valuation allowance			28.4
Reduction in valuation allowance	$ 24.5

The sum of the portions of deferred tax assets as of the balance sheet date for which, based on the weight of available evidence, it is more likely than not will not be realized through future reductions of tax-based income.

+ References+ Details

This element represents the total of accruals as of the date of the statement of financial position for interest 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 and the amount of statutory penalties 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.

+ References+ Details

- Definition

The amount of the change in the period in the valuation allowance for a specified deferred tax asset.

+ References+ Details