Derivatives (Derivatives Associated With Legacy Mortgage Servicing Activities) (Details) (USD $) In Thousands, unless otherwise specified					3 Months Ended
	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011	Dec. 31, 2010	Mar. 31, 2012 Forwards And Futures [Member] Retained Interests Hedging [Member] Hedging Instruments [Member]		Mar. 31, 2011 Forwards And Futures [Member] Retained Interests Hedging [Member] Hedging Instruments [Member]		Mar. 31, 2012 Interest Rate Swaps And Swaptions [Member] Retained Interests Hedging [Member] Hedging Instruments [Member]		Mar. 31, 2011 Interest Rate Swaps And Swaptions [Member] Retained Interests Hedging [Member] Hedging Instruments [Member]		Mar. 31, 2012 Mortgage Servicing Rights [Member] Retained Interests Hedging [Member] Hedged Items [Member]		Mar. 31, 2011 Mortgage Servicing Rights [Member] Retained Interests Hedging [Member] Hedged Items [Member]		Mar. 31, 2012 Other Retained Interests [Member] Retained Interests Hedging [Member] Hedged Items [Member]		Mar. 31, 2011 Other Retained Interests [Member] Retained Interests Hedging [Member] Hedged Items [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional									$ 2,420,000	[1],[2]	$ 3,848,000	[1],[2]
Notional, Forwards and Futures					2,361,000	[1],[2]	4,868,000	[1],[2]
Assets									9,713	[1],[2]	25,578	[1],[2]
Assets, Forwards and Futures					25,200	[1],[2]	4,852	[1],[2]
Liabilities									30,443	[1],[2]	13,570	[1],[2]
Liabilities, Forwards and Futures					1,155	[1],[2]	11,650	[1],[2]
Gains/(Losses)									4,384	[1],[2]	7,339	[1],[2]
Gains/(Losses), Forwards and Futures					(1,311)	[1],[2]	(4,044)	[1],[2]
Mortgage servicing rights	142,956	144,069	207,748	207,319									139,672	[1],[3]	203,936	[1],[3]
Fair value of retained interests	1,238,041	988,217	924,854														24,610	[1],[4]	34,127	[1],[4]
Gains/(Losses)													$ 5,031	[1],[3]	$ 7,133	[1],[3]	$ 960	[1],[4]	$ 2,044	[1],[4]

[1] Gains/losses included in the Mortgage banking income section of the Consolidated Condensed Statements of Income.

[2] Assets included in the Other assets section of the Consolidated Condensed Statements of Condition. Liabilities included in the Other liabilities section of the Consolidated Condensed Statements of Condition.

[3] Assets included in the Mortgage servicing rights section of the Consolidated Condensed Statements of Condition.

[4] Assets included in the Trading securities section of the Consolidated Condensed Statements of Condition.