Loans And Allowance For Loan Losses (Summary Of Troubled Debt Restructurings By Class Of Loans) (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013 Contract	Mar. 31, 2012 Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts	148	116
Pre-Modification Outstanding Recorded Investment	$ 3,031	$ 1,106
Post-Modification Outstanding Recorded Investment	2,992	1,106
Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	5
Pre-Modification Outstanding Recorded Investment	1,029
Post-Modification Outstanding Recorded Investment	905
Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts		1
Pre-Modification Outstanding Recorded Investment		117
Post-Modification Outstanding Recorded Investment		73
Commercial leases [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Commercial loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	5	1
Pre-Modification Outstanding Recorded Investment	1,029	117
Post-Modification Outstanding Recorded Investment	905	73
Direct installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	110	94
Pre-Modification Outstanding Recorded Investment	1,176	600
Post-Modification Outstanding Recorded Investment	1,150	605
Residential mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	14	13
Pre-Modification Outstanding Recorded Investment	597	377
Post-Modification Outstanding Recorded Investment	709	416
Indirect installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	10	6
Pre-Modification Outstanding Recorded Investment	56	9
Post-Modification Outstanding Recorded Investment	56	9
Consumer lines of credit [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	9	2
Pre-Modification Outstanding Recorded Investment	173	3
Post-Modification Outstanding Recorded Investment	172	3
Other [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment