Loans And Leases (Loans And Leases Modified As A TDR) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013 Contract	Sep. 30, 2012 Contract	Sep. 30, 2013 Contract	Sep. 30, 2012 Contract
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	81	701	242	818
Pre- Modification Recorded Investment	$ 11,414	$ 72,960	$ 50,174	$ 103,939
Post- Modification Recorded Investment	11,414	72,960	50,174	103,939
Post- Modification Coupon Rate	5.00%	4.10%	4.40%	4.60%
1-4 family [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	24	120	96	170
Pre- Modification Recorded Investment	4,872	17,441	19,130	26,269
Post- Modification Recorded Investment	4,872	17,441	19,130	26,269
Post- Modification Coupon Rate	4.50%	4.70%	4.00%	4.40%
Construction [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	0	1	0	2
Pre- Modification Recorded Investment	0	159	0	263
Post- Modification Recorded Investment	0	159	0	263
Post- Modification Coupon Rate	0.00%	6.40%	0.00%	6.60%
Home equity loans [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	31	459	96	486
Pre- Modification Recorded Investment	1,058	23,277	5,036	25,549
Post- Modification Recorded Investment	1,058	23,277	5,036	25,549
Post- Modification Coupon Rate	5.20%	5.10%	4.40%	5.00%
Liquidating portfolio-home equity loans [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	10	108	19	112
Pre- Modification Recorded Investment	223	5,542	657	5,577
Post- Modification Recorded Investment	223	5,542	657	5,577
Post- Modification Coupon Rate	5.60%	5.50%	5.20%	5.60%
Commercial non-mortgage [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	14	8	24	33
Pre- Modification Recorded Investment	4,921	4,786	13,109	21,772
Post- Modification Recorded Investment	4,921	4,786	13,109	21,772
Post- Modification Coupon Rate	5.40%	3.10%	6.50%	6.30%
Commercial real estate [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	2	4	5	7
Pre- Modification Recorded Investment	340	21,507	12,053	23,919
Post- Modification Recorded Investment	340	21,507	12,053	23,919
Post- Modification Coupon Rate	5.60%	2.20%	2.80%	2.50%
Residential development [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	0	0	2	0
Pre- Modification Recorded Investment	0	0	189	0
Post- Modification Recorded Investment	0	0	189	0
Post- Modification Coupon Rate	0.00%	0.00%	5.00%	0.00%
Equipment financing [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	0	1	0	8
Pre- Modification Recorded Investment	0	248	0	590
Post- Modification Recorded Investment	$ 0	$ 248	$ 0	$ 590
Post- Modification Coupon Rate	0.00%	6.10%	0.00%	6.70%