Income Taxes (Details 3) (USD $)			12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 Federal [Member]	Dec. 31, 2011 State [Member]	Dec. 31, 2011 Other Federal and State [Member]
Estimated tax attribute carryovers and their expiration dates
Operating losses, carryover amount			$ 9,000,000,000	$ 8,000,000,000
Operating losses, years of expiration			2023-2031	2012-2031
Capital losses	12,995,000	56,602,000		162,000,000
Capital Losses, years of expiration				2013-2015
Tax Credit carryforward amount			$ 79,000,000		$ 80,000,000
Tax credit, years of expiration			never		2012-2031