Income Taxes Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Jun. 30, 2012
U.S. Federal [Member]
Current Federal Tax Expense (Benefit) [Line Items]
Deferred Tax Liabilities	$ 50.0
Amount of valuation allowance reversal	70.1
Valuation Allowance, Amount	29.4
State [Member]
Current Federal Tax Expense (Benefit) [Line Items]
Deferred Tax Liabilities	7.4
Amount of valuation allowance reversal	20.0
Valuation Allowance, Amount	9.7
CCAL [Member]
Current Federal Tax Expense (Benefit) [Line Items]
Valuation Allowance, Amount	$ 61.7

The cumulative amount of all deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A taxable temporary difference is a difference between the tax basis and the carrying amount of an asset or liability in the financial statements prepared in accordance with generally accepted accounting principles that will result in taxable amounts in one or more future periods.

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The amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns.

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- Definition

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

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