Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 900,000
Amount of interest and penalties included in liabilities for uncertain tax positions	500,000
Increased interest and penalties	100,000
Cash paid for income taxes (refunds received), net	55,551,000	26,463,000	128,186,000
State and Local Jurisdiction [Member]
Net operating loss and credit carryforwards	3,500,000,000
Expiration date of net operating loss carryforwards	2013 to 2032
Operating Loss Carryforwards, Valuation Allowance	17,400,000
Valuation allowance increase	$ 11,100,000	$ 23,600,000