Fair Value Of Assets And Liabilities (Schedule Of Unobservable Inputs Utilized In Determining The Fair Value Of Level 3 Recurring And Non-Recurring Measurements) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012
Interest Only Trading Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 17,381,000
Valuation Techniques	Discounted cash flow
Unobservable Input	(a)	[1]
Level 3 class, values utilized	(a)	[1]
Loans Held-For-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, recurring and nonrecurring	225,809,000
Valuation Techniques	Discounted cash flow
Venture Capital Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	12,179,000
Mortgage Servicing Rights [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	142,956,000
Valuation Techniques	Discounted cash flow
Unobservable Input	(a)	[1]
Level 3 class, values utilized	(a)	[1]
Other Short-Term Borrowings [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	15,073,000
Valuation Techniques	Discounted cash flow
Unobservable Input	(b)	[2]
Level 3 class, values utilized	(b)	[2]
Derivative Liabilities, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	2,960,000
Valuation Techniques	Discounted cash flow
Loans, Net Of Unearned Income [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, nonrecurring	120,938,000	[3]
Unobservable Input	Financial Statements/Auction Values
Real Estate Acquired By Foreclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, nonrecurring	59,132,000	[4]
Valuation Techniques	Appraisals from comparable properties	[4]
Unobservable Input	Adjustment for value changes since appraisal	[4]
Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, nonrecurring	86,794,000	[5]
Recent Purchase Offers [Member] | Venture Capital Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Techniques	Recent purchase offers
Unobservable Input	Adjustment for preferences in equity tranches
Recent Capitalization Transactions [Member] | Venture Capital Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Techniques	Recent capitalization transactions
Unobservable Input	Adjustment for preferences in equity tranches
Discounted Cash Flow [Member] | Derivative Liabilities, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	Visa covered litigation resolution amount
Discounted Cash Flow [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Techniques	Discounted cash flow	[5]
Unobservable Input	Adjustments to current sales yields for specific properties	[5]
Discounted Cash Flow [Member] | 6% - 10% Values Utilized [Member] | Loans Held-For-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	Prepayment speeds
Discounted Cash Flow [Member] | 2% - 4% Values Utilized [Member] | Loans Held-For-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	Credit spreads
Discounted Cash Flow [Member] | 15.0% - 25.0% Values Utilized [Member] | Loans Held-For-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	Delinquency adjustment factor
Discounted Cash Flow [Member] | Credit Spread 50% - 60% Of UPB [Member] | Loans Held-For-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	Loss severity trends
Discounted Cash Flow [Member] | 10% - 30% [Member] | Derivative Liabilities, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	Probability of resolution scenarios
Appraisals From Comparable Properties [Member] | Loans, Net Of Unearned Income [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Techniques	Appraisals from comparable properties	[3]
Unobservable Input	Adjustment for value changes since appraisal	[3]
Appraisals From Comparable Properties [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Techniques	Appraisals from comparable properties
Unobservable Input	Marketability adjustments for specific properties
Other Collateral Valuations [Member] | Loans, Net Of Unearned Income [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Techniques	Other collateral valuations
Unobservable Input	Borrowing base certificates
Maximum [Member] | Derivative Liabilities, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	30.00%
Values Utilized	5,100,000
Values Utilized, period, months	12
Maximum [Member] | 6% - 10% Values Utilized [Member] | Loans Held-For-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	10.00%
Maximum [Member] | 2% - 4% Values Utilized [Member] | Loans Held-For-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	4.00%
Maximum [Member] | 15.0% - 25.0% Values Utilized [Member] | Loans Held-For-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	25.00%
Maximum [Member] | Credit Spread 50% - 60% Of UPB [Member] | Loans Held-For-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	60.00%
Maximum [Member] | 5% - 15% Of Appraisal [Member] | Loans, Net Of Unearned Income [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	15.00%
Maximum [Member] | 20% - 50% Of Gross Value [Member] | Loans, Net Of Unearned Income [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	50.00%
Maximum [Member] | 0% - 25% Of Reported Value [Member] | Loans, Net Of Unearned Income [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	25.00%
Maximum [Member] | 0% - 10% Of Appraisal [Member] | Real Estate Acquired By Foreclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	10.00%
Maximum [Member] | Recent Purchase Offers [Member] | 0% - 10% Discount [Member] | Venture Capital Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	10.00%
Maximum [Member] | Recent Capitalization Transactions [Member] | 0% - 10% Discount [Member] | Venture Capital Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	10.00%
Maximum [Member] | Discounted Cash Flow [Member] | 0% - 15% Adjustment To Yield [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	15.00%
Maximum [Member] | Appraisals From Comparable Properties [Member] | 0% - 25% Of Appraisal [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	25.00%
Minimum [Member] | Derivative Liabilities, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	10.00%
Values Utilized	$ 4,300,000
Values Utilized, period, months	3
Minimum [Member] | 6% - 10% Values Utilized [Member] | Loans Held-For-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	6.00%
Minimum [Member] | 2% - 4% Values Utilized [Member] | Loans Held-For-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	2.00%
Minimum [Member] | 15.0% - 25.0% Values Utilized [Member] | Loans Held-For-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	15.00%
Minimum [Member] | Credit Spread 50% - 60% Of UPB [Member] | Loans Held-For-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	50.00%
Minimum [Member] | 5% - 15% Of Appraisal [Member] | Loans, Net Of Unearned Income [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	5.00%
Minimum [Member] | 20% - 50% Of Gross Value [Member] | Loans, Net Of Unearned Income [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	20.00%
Minimum [Member] | 0% - 25% Of Reported Value [Member] | Loans, Net Of Unearned Income [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	0.00%
Minimum [Member] | 0% - 10% Of Appraisal [Member] | Real Estate Acquired By Foreclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	0.00%
Minimum [Member] | Recent Purchase Offers [Member] | 0% - 10% Discount [Member] | Venture Capital Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	0.00%
Minimum [Member] | Recent Capitalization Transactions [Member] | 0% - 10% Discount [Member] | Venture Capital Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	0.00%
Minimum [Member] | Discounted Cash Flow [Member] | 0% - 15% Adjustment To Yield [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	0.00%
Minimum [Member] | Appraisals From Comparable Properties [Member] | 0% - 25% Of Appraisal [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percent of Values Utilized	0.00%
Three Months To Twelve Months [Member] | Discounted Cash Flow [Member] | Derivative Liabilities, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	Time until resolution

[1] The unobservable inputs for Interest-only trading securities and MSR are discussed in Note 12.

[2] The inputs and associated ranges for Other short-term borrowings mirror those of the related MSR.

[3] Represents carrying value of loans for which adjustments are based on the appraised value of the collateral. Write-downs on these loans are recognized as part of provision.

[4] Represents the fair value and related losses of foreclosed properties that were measured subsequent to their initial classification as foreclosed assets. Balance excludes foreclosed real estate related to government insured mortgages.

[5] Represents low income housing investments and new market tax credit investments.