Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Line Items]
Decreased in valuation allowance			$ 2.2
Effective tax rate on pretax (loss) income from continuing operations			(21.60%)	39.00%	38.80%
Goodwill impairment	5.8	565.0	570.8
Goodwill impairment, non-deductable for tax purposes			218.5
Uncertain tax benefits				0.7	1.1
Interest and penalties accrued on the balance sheet related to uncertain income tax positions	0		0
Number of individual states subject to income taxes			50
Tax years open to examination			December 2007 through December 2011
State [Member]
Income Taxes [Line Items]
Net operating loss carry forwards	116.5		116.5
Net operating loss carry forwards, expiration date			2010
Operating loss carry forwards acquired as part of the acquisition			$ 13.2