Income Taxes Carryforwards (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013 Internal Revenue Service (IRS) [Member]	Mar. 31, 2014 Subsequent Event [Member]
Operating Loss Carryforwards [Line Items]
Federal Net Operating Loss Carryforwards to Expire in 2030	$ 301.2
Federal Tax Credit Carryforwards that Expire Beginning in 2023	40.6
Deferred Tax Assets, Operating Loss Carryforwards, State and Local, Decrease		$ 1.5