Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Income Taxes.
Federal and state net operating loss carryforwards amount subject to IRC Section 382 limitations	$ 728
Unused net operating loss carryforwards	776
Amount of net operating loss carryforwards which will expire prior to utilization	715
Recognition period for net unrealized built in losses	5 years
Unfavorable book to tax add backs in U.S. corporate income tax return amount	19.4
Gross deferred tax liability	$ 7.4