Loans And Leases (Loans And Leases Modified As A TDR) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 Contract	Dec. 31, 2012 Contract	Dec. 31, 2011 Contract
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	305	909	346
Pre- Modification Recorded Investment	$ 62,054	$ 115,539	$ 149,438
Recorded Investment	62,054	115,539	149,438
Coupon Rate	4.50%	4.60%	4.80%
Residential 1-4 family [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	124	197	137
Pre- Modification Recorded Investment	25,833	32,974	31,939
Recorded Investment	25,833	32,974	31,939
Coupon Rate	4.00%	4.40%	4.10%
Construction [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	0	2	0
Pre- Modification Recorded Investment	0	263	0
Recorded Investment	0	263	0
Coupon Rate	0.00%	6.60%	0.00%
Home equity [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	120	526	106
Pre- Modification Recorded Investment	6,370	26,569	9,422
Recorded Investment	6,370	26,569	9,422
Coupon Rate	4.50%	5.00%	4.30%
Liquidating-home equity [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	22	123	26
Pre- Modification Recorded Investment	703	5,693	1,428
Recorded Investment	703	5,693	1,428
Coupon Rate	5.30%	5.60%	5.40%
Commercial non-mortgage [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	29	37	48
Pre- Modification Recorded Investment	13,265	22,699	45,507
Recorded Investment	13,265	22,699	45,507
Coupon Rate	6.50%	6.30%	6.40%
Asset-based [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	0	0	3
Pre- Modification Recorded Investment	0	0	2,563
Recorded Investment	0	0	2,563
Coupon Rate	0.00%	0.00%	5.20%
Commercial real estate [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	6	10	21
Pre- Modification Recorded Investment	12,121	25,855	47,544
Recorded Investment	12,121	25,855	47,544
Coupon Rate	2.80%	2.80%	4.10%
Commercial construction [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	0	0	1
Pre- Modification Recorded Investment	0	0	10,100
Recorded Investment	0	0	10,100
Coupon Rate	0.00%	0.00%	3.00%
Residential development [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	4	6	2
Pre- Modification Recorded Investment	3,762	896	719
Recorded Investment	3,762	896	719
Coupon Rate	5.30%	5.30%	5.30%
Equipment financing [Member]
Information On How Loans And Leases Were Modified As Troubled Debt Restructuring [Line Items]
Number of Loans and Leases	0	8	2
Pre- Modification Recorded Investment	0	590	216
Recorded Investment	$ 0	$ 590	$ 216
Coupon Rate	0.00%	6.70%	7.90%