Fair Value Measurements (Reconciliation Of The Credit Loss Recognized On Subordinated Tax Increment Revenue Bonds) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Credit loss recognized, beginning balance	$ 31,022	$ 11,717
Additions	0	19,305
Credit loss recognized, ending balance	$ 31,022	$ 31,022