Loans And Leases (Interest Income From Impaired Loans And Leases, By Class) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			$ 479,281	$ 562,260
Impaired Financing Receivable, Interest Income, Accrual Method	4,727	3,901	13,301	14,831
1-4 Family [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			130,986	118,155
Impaired Financing Receivable, Interest Income, Accrual Method	1,374	1,093	3,909	3,535
Permanent-NCLC [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			10,763	10,471
Impaired Financing Receivable, Interest Income, Accrual Method	111	105	327	310
Construction Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			197	68
Impaired Financing Receivable, Interest Income, Accrual Method	2	2	4	7
Home Equity Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			41,724	28,696
Impaired Financing Receivable, Interest Income, Accrual Method	633	314	1,336	1,062
Liquidating Portfolio-Home Equity Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			7,721	5,535
Impaired Financing Receivable, Interest Income, Accrual Method	132	64	263	274
Commercial Non-Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			93,090	125,876
Impaired Financing Receivable, Interest Income, Accrual Method	830	813	3,035	3,330
Asset-Based Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			986	11,931
Impaired Financing Receivable, Interest Income, Accrual Method	0	61	0	251
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			170,213	194,103
Impaired Financing Receivable, Interest Income, Accrual Method	1,479	1,230	3,921	4,868
Commercial Construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			7,307	26,904
Impaired Financing Receivable, Interest Income, Accrual Method	70	114	216	718
Residential Development [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			14,083	29,444
Impaired Financing Receivable, Interest Income, Accrual Method	83	84	254	414
Equipment Financing [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			2,207	11,068
Impaired Financing Receivable, Interest Income, Accrual Method	13	21	36	62
Liquidating Portfolio-Construction Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			0	1
Impaired Financing Receivable, Interest Income, Accrual Method	0	0	0	0
Other Consumer [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			4	8
Impaired Financing Receivable, Interest Income, Accrual Method	0	0	0	0
Total Residential [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			141,946	128,695
Impaired Financing Receivable, Interest Income, Accrual Method	1,487	1,200	4,240	3,852
Total Consumer [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			49,449	34,239
Impaired Financing Receivable, Interest Income, Accrual Method	765	378	1,599	1,336
Total Commercial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			94,076	137,807
Impaired Financing Receivable, Interest Income, Accrual Method	830	874	3,035	3,581
Total Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			191,603	250,451
Impaired Financing Receivable, Interest Income, Accrual Method	1,632	1,428	4,391	6,000
Total Equipment Financing [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment			2,207	11,068
Impaired Financing Receivable, Interest Income, Accrual Method	$ 13	$ 21	$ 36	$ 62