Loans And Leases (Loans And Leases Modified As A TDR) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013 Contract	Jun. 30, 2012 Contract	Jun. 30, 2013 Contract	Jun. 30, 2012 Contract
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	80	63	161	117
Pre- Modification Recorded Investment	$ 17,109	$ 14,293	$ 38,760	$ 30,979
Post- Modification Recorded Investment	17,109	14,293	38,760	30,979
Post- Modification Coupon Rate	5.40%	5.40%	4.30%	5.80%
1-4 family [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	40	26	72	50
Pre- Modification Recorded Investment	7,845	4,768	14,258	8,828
Post- Modification Recorded Investment	7,845	4,768	14,258	8,828
Post- Modification Coupon Rate	3.90%	3.40%	3.90%	3.70%
Construction [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	0	1	0	1
Pre- Modification Recorded Investment	0	104	0	104
Post- Modification Recorded Investment	0	104	0	104
Post- Modification Coupon Rate	0.00%	6.90%	0.00%	6.90%
Home equity loans [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	28	15	65	27
Pre- Modification Recorded Investment	1,581	1,319	3,978	2,272
Post- Modification Recorded Investment	1,581	1,319	3,978	2,272
Post- Modification Coupon Rate	4.30%	4.00%	4.20%	4.00%
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	4	2	9	4
Pre- Modification Recorded Investment	345	35	434	35
Post- Modification Recorded Investment	345	35	434	35
Post- Modification Coupon Rate	4.40%	9.20%	5.00%	9.10%
Commercial non-mortgage [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	7	13	10	25
Pre- Modification Recorded Investment	7,300	5,758	8,188	16,986
Post- Modification Recorded Investment	7,300	5,758	8,188	16,986
Post- Modification Coupon Rate	7.40%	7.40%	7.10%	7.20%
Commercial real estate [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	1	2	3	3
Pre- Modification Recorded Investment	38	2,167	11,713	2,412
Post- Modification Recorded Investment	38	2,167	11,713	2,412
Post- Modification Coupon Rate	4.50%	4.90%	2.70%	5.00%
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%	5.30%	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	4	0	7
Pre- Modification Recorded Investment	0	142	0	342
Post- Modification Recorded Investment	$ 0	$ 142	$ 0	$ 342
Post- Modification Coupon Rate	0.00%	7.60%	0.00%	7.20%