Loans And Allowance For Loan Losses (Summary Of Troubled Debt Restructurings By Class Of Loans, Payment Default) (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013 Contract		Mar. 31, 2012 Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts	28		17
Recorded Investment	$ 314	[1]	$ 188	[1]
Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts
Recorded Investment		[1]		[1]
Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1
Recorded Investment	33	[1]		[1]
Commercial leases [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts
Recorded Investment		[1]		[1]
Commercial loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1
Recorded Investment	33	[1]		[1]
Direct installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	21		14
Recorded Investment	170	[1]	29	[1]
Residential mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	2		2
Recorded Investment	93	[1]	158	[1]
Indirect installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	4		1
Recorded Investment	18	[1]	1	[1]
Consumer lines of credit [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts
Recorded Investment		[1]		[1]
Other [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts
Recorded Investment		[1]		[1]

[1] The recorded investment is as of period end.