Allowance For Loan Losses, Allowance For Losses On Lending-Related Commitments And Impaired Loans (Summary Of Loans Restructured And Subsequently Defaulted Under The Restructured Terms) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	139	[1]	93	[1]
Balance	$ 130,851	[1]	$ 67,969	[1]
Residential Real Estate And Other [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	19	[1]	4	[1]
Balance	6,777	[1]	1,527	[1]
Commercial And Industrial [Member] | Commercial [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	20	[1]	38	[1]
Balance	5,388	[1]	15,222	[1]
Residential Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	1	[1]
Balance	1,105	[1]
Commercial Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	10	[1]	3	[1]
Balance	12,762	[1]	2,006	[1]
Land [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	20	[1]	7	[1]
Balance	34,452	[1]	7,155	[1]
Office [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	6	[1]	8	[1]
Balance	6,401	[1]	10,402	[1]
Industrial [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	3	[1]	4	[1]
Balance	2,110	[1]	6,373	[1]
Retail [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	19	[1]	8	[1]
Balance	27,746	[1]	7,249	[1]
Multi-Family [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	6	[1]	4	[1]
Balance	4,414	[1]	3,277	[1]
Mixed Use And Other [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	35	[1]	17	[1]
Balance	29,696	[1]	14,758	[1]
Payment In Default [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	24	[2]	25	[2]
Balance	14,524	[2]	13,529	[2]
Payment In Default [Member] | Residential Real Estate And Other [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	3	[2]	2	[2]
Balance	721	[2]	450	[2]
Payment In Default [Member] | Commercial And Industrial [Member] | Commercial [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	6	[2]	13	[2]
Balance	664	[2]	4,230	[2]
Payment In Default [Member] | Commercial Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	1	[2]	1	[2]
Balance	467	[2]	981	[2]
Payment In Default [Member] | Land [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	2	[2]	1	[2]
Balance	1,430	[2]	347	[2]
Payment In Default [Member] | Office [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	2	[2]	1	[2]
Balance	421	[2]	1,660	[2]
Payment In Default [Member] | Retail [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	3	[2]	3	[2]
Balance	4,299	[2]	3,141	[2]
Payment In Default [Member] | Multi-Family [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count			1	[2]
Balance			633	[2]
Payment In Default [Member] | Mixed Use And Other [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	7	[2]	3	[2]
Balance	$ 6,522	[2]	$ 2,087	[2]

[1] Total restructured loans represent all loans restructured during the previous twelve months from the date indicated.

[2] Restructured loans considered to be in payment default are over 30 days past-due subsequent to the restructuring.