Fair Value Of Assets And Liabilities (Changes In Fair Value Of Assets And Liabilities Which Fair Value Option Included In Current Period Earnings) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Mortgage Banking Noninterest Income [Member] | Loans Held For Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in fair value included in net income	$ 41,757,000	$ (1,805,000)	$ 51,158,000	$ (3,940,000)
Mortgage Banking Noninterest Income [Member] | Other Short-Term Borrowings [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in fair value included in net income	0	634,000	0	(559,000)
Capital Market Noninterest Income [Member] | Mortgage Loan Pool Held For Trading [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in fair value included in net income	$ 0	$ 1,867,000	$ 0	$ 1,867,000