Income Taxes (Details 3) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
State [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to expire	$ 669.0
U.S. Federal [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to be fully utilized	17.9
2012 [Member] | State [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to expire	2.6
2012 [Member] | U.S. Federal [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to be fully utilized	5.2
2013 [Member] | State [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to expire	7.0
2013 [Member] | U.S. Federal [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to be fully utilized	5.2
2014 [Member] | State [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to expire	18.4
2014 [Member] | U.S. Federal [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to be fully utilized	0.9
2015 [Member] | State [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to expire	8.0
2015 [Member] | U.S. Federal [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to be fully utilized	0.7
2016 [Member] | State [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to expire	4.3
2016 [Member] | U.S. Federal [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to be fully utilized	0.7
2017 and after [Member] | State [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to expire	628.7
2017 and after [Member] | U.S. Federal [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to be fully utilized	$ 5.2