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, 2015	Mar. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	$ 26,700	$ 229,219
Aggregate Unpaid Principal | Loans Held-For-Sale Reported At Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	40,762	374,401
Nonaccrual loans	13,023	133,600
Loans 90 days or more past due and still accruing	1,686	15,010
Fair Value Carrying Amount Less Aggregate Unpaid Principal | Loans Held-For-Sale Reported At Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	(14,062)	(145,182)
Nonaccrual loans	(6,243)	(71,758)
Loans 90 days or more past due and still accruing	(343)	(7,750)
Fair Value Carrying Amount | Loans Held-For-Sale Reported At Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	26,700	229,219
Nonaccrual loans	6,780	61,842
Loans 90 days or more past due and still accruing	$ 1,343	$ 7,260