Taxes Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2008
Taxes [Abstract]
Interest and penalties accrued related to unrecognized tax benefits	$ 1,000,000	$ 800,000
Operating loss carryforwards	1,300,000,000			145,100,000
Operating Loss Carryforwards, Expiration Dates	expire between 2024 and 2032
Tax credit carryforward	150,000,000
Furture cash tax benefits accrue		800,000	1,300,000
Increase (decrease) in valuation allowance	31,800,000	2,100,000	(400,000)
Interest and penalties recognized	200,000
Stock options and other equity based compensation, tax expense (benefit)	$ 300,000	$ (400,000)	$ (800,000)