Commitments And Contingencies (Consolidated Statements Of Financial Condition Related To Fair Value Of Derivative Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Other Assets [Member] | Designated As Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 1,146	$ 8,414
Other Assets [Member] | Designated As Hedging Instrument [Member] | Cash Flow Hedge Interest Rate Caps And Swaps On Short-Term Borrowings And Deposit Accounts [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	294	8,414
Other Assets [Member] | Designated As Hedging Instrument [Member] | Fair Value Hedge Commercial Loan Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	852
Other Assets [Member] | Not Designated As Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	4,065
Other Assets [Member] | Not Designated As Hedging Instrument [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	4,065
Other Liabilities [Member] | Designated As Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	17,789	1,379
Other Liabilities [Member] | Designated As Hedging Instrument [Member] | Cash Flow Hedge Interest Rate Caps And Swaps On Short-Term Borrowings And Deposit Accounts [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	15,649
Other Liabilities [Member] | Designated As Hedging Instrument [Member] | Fair Value Hedge Commercial Loan Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	2,140	1,379
Other Liabilities [Member] | Not Designated As Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	4,065
Other Liabilities [Member] | Not Designated As Hedging Instrument [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	$ 4,065