Fair Value Of Assets And Liabilities (Summary Of Differences Between The Fair Value Carrying Amount Of Mortgages Held-For-Sale And Aggregate Unpaid Principal Amount) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	$ 232,684	$ 223,158
Aggregate Unpaid Principal [Member] | Loans Held For Sale Reported At Fair Value [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	367,952	310,837
Nonaccrual loans	130,874	96,820
Loans 90 days or more past due and still accruing	18,370	19,062
Fair Value Carrying Amount Less Aggregate Unpaid Principal [Member] | Loans Held For Sale Reported At Fair Value [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	(135,268)	(87,679)
Nonaccrual loans	(69,006)	(52,507)
Loans 90 days or more past due and still accruing	(10,191)	(10,360)
Carrying Reported Amount Fair Value Disclosure [Member] | Loans Held For Sale Reported At Fair Value [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	232,684	223,158
Nonaccrual loans	61,868	44,313
Loans 90 days or more past due and still accruing	$ 8,179	$ 8,702