Loans And Leases (Loans And Leases Modified As TDRs Within Previous Twelve Months And For Which There Was A Payment Default In Period) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 loan	Dec. 31, 2011 loan
Financing Receivable, Impaired [Line Items]
Number of Loans and Leases	2	27
Recorded Investment	$ 847	$ 5,625
1-4 Family [Member]
Financing Receivable, Impaired [Line Items]
Number of Loans and Leases	2	9
Recorded Investment	847	1,625
Permanent-NCLC [Member]
Financing Receivable, Impaired [Line Items]
Number of Loans and Leases	0	0
Recorded Investment	0	0
Home Equity Loans [Member]
Financing Receivable, Impaired [Line Items]
Number of Loans and Leases	0	8
Recorded Investment	0	1,195
Liquidating Portfolio-Home Equity Loans [Member]
Financing Receivable, Impaired [Line Items]
Number of Loans and Leases	0	2
Recorded Investment	0	108
Commercial Non-Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Number of Loans and Leases	0	3
Recorded Investment	0	804
Asset-Based Loans [Member]
Financing Receivable, Impaired [Line Items]
Number of Loans and Leases	0	2
Recorded Investment	0	522
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Number of Loans and Leases	0	3
Recorded Investment	$ 0	$ 1,371