Derivatives - Interest Rate Swap Agreements (Schedule Of Location Of Derivatives On Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Derivatives - Interest Rate Swap Agreements [Abstract]
Interest rate hedge asset - Fair Value Asset Derivatives	$ 0	$ 23,944
Interest rate hedge liability - Fair Value Liability Derivatives	219,167	71,681
Forward purchase commitment - Asset Derivatives found in Other Assets	6,327
Forward purchase commitments found in Account payable and other liabilities		$ 8,545