Income Taxes (Operating Loss Carryforwards) (Details 5) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
State [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to expire	$ 597.1
U.S. Federal [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to be fully utilized	7.4
2014 [Member] | State [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to expire	5.3
2014 [Member] | U.S. Federal [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to be fully utilized	0.7
2015 [Member] | State [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to expire	5.4
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	5.7
2016 [Member] | U.S. Federal [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to be fully utilized	0.7
2017 [Member] | State [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to expire	2.5
2017 [Member] | U.S. Federal [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to be fully utilized	0.7
2018 [Member] | State [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to expire	4.5
2018 [Member] | U.S. Federal [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to be fully utilized	0.7
2019 and after [Member] | State [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to expire	573.7
2019 and after [Member] | U.S. Federal [Member]
Operating Loss Carryforwards [Line Items]
Income tax loss carryforwards to be fully utilized	$ 3.9