Fair Value Measurements (Reconciliation Of The Credit Loss Recognized On Tax Increment Revenue Bonds) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance	$ 31,022	$ 11,717
Additions	0	19,305
Ending balance	$ 31,022	$ 31,022