Loans (Information By Class Related To Individually Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	$ 499,925	$ 601,557	$ 499,925	$ 601,557
Unpaid Principal Balance	577,704	751,140	577,704	751,140
Related Allowance	96,205	99,464	96,205	99,464
Average Recorded Investment	493,895	610,449	489,837	612,203
Interest Income Recognized on impaired loan	1,820	1,793	3,526	3,118
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	254,415	397,275	254,415	397,275
Unpaid Principal Balance	332,194	546,858	332,194	546,858
Related Allowance	39,165	60,470	39,165	60,470
Average Recorded Investment	260,832	416,421	269,929	426,411
Interest Income Recognized on impaired loan	389	985	790	1,515
Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	245,510	204,282	245,510	204,282
Unpaid Principal Balance	245,510	204,282	245,510	204,282
Related Allowance	57,040	38,994	57,040	38,994
Average Recorded Investment	233,063	194,028	219,908	185,792
Interest Income Recognized on impaired loan	1,431	808	2,736	1,603
Impaired Loans With No Related Allowance Recorded [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	182,838	288,795	182,838	288,795
Unpaid Principal Balance	260,569	428,655	260,569	428,655
Related Allowance	0	0	0	0
Average Recorded Investment	190,917	302,255	198,381	262,974
Interest Income Recognized on impaired loan	342	893	694	1,364
Impaired Loans With Related Allowance Recorded [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	71,577	108,480	71,577	108,480
Unpaid Principal Balance	71,625	118,203	71,625	118,203
Related Allowance	39,165	60,470	39,165	60,470
Average Recorded Investment	69,915	114,166	71,548	163,437
Interest Income Recognized on impaired loan	47	92	96	151
General C&I [Member] | Impaired Loans With No Related Allowance Recorded [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	62,122	91,940	62,122	91,940
Unpaid Principal Balance	81,423	117,491	81,423	117,491
Related Allowance	0	0	0	0
Average Recorded Investment	62,858	91,082	68,551	66,902
Interest Income Recognized on impaired loan	204	232	407	489
General C&I [Member] | Impaired Loans With Related Allowance Recorded [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	18,948	43,956	18,948	43,956
Unpaid Principal Balance	18,948	53,258	18,948	53,258
Related Allowance	7,629	23,980	7,629	23,980
Average Recorded Investment	15,889	49,949	16,696	78,748
Interest Income Recognized on impaired loan	33	81	67	140
TRUPs [Member] | Impaired Loans With No Related Allowance Recorded [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	47,000	57,000	47,000	57,000
Unpaid Principal Balance	47,000	57,000	47,000	57,000
Related Allowance	0	0	0	0
Average Recorded Investment	47,000	47,500	47,000	42,500
Interest Income Recognized on impaired loan	0	0	0	0
TRUPs [Member] | Impaired Loans With Related Allowance Recorded [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	33,700	30,000	33,700	30,000
Unpaid Principal Balance	33,700	30,000	33,700	30,000
Related Allowance	23,829	26,693	23,829	26,693
Average Recorded Investment	33,700	30,000	33,700	30,000
Interest Income Recognized on impaired loan	0	0	0	0
Income CRE [Member] | Impaired Loans With No Related Allowance Recorded [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	51,375	96,935	51,375	96,935
Unpaid Principal Balance	92,153	167,950	92,153	167,950
Related Allowance	0	0	0	0
Average Recorded Investment	57,783	110,102	59,514	102,411
Interest Income Recognized on impaired loan	76	392	153	531
Income CRE [Member] | Impaired Loans With Related Allowance Recorded [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	1,529	12,129	1,529	12,129
Unpaid Principal Balance	1,577	12,314	1,577	12,314
Related Allowance	189	3,550	189	3,550
Average Recorded Investment	1,869	11,866	1,876	23,335
Interest Income Recognized on impaired loan	14	11	29	11
Residential CRE [Member] | Impaired Loans With No Related Allowance Recorded [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	22,341	42,920	22,341	42,920
Unpaid Principal Balance	39,993	86,214	39,993	86,214
Related Allowance	0	0	0	0
Average Recorded Investment	23,276	53,571	23,316	51,161
Interest Income Recognized on impaired loan	62	269	134	344
Residential CRE [Member] | Impaired Loans With Related Allowance Recorded [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	17,400	22,395	17,400	22,395
Unpaid Principal Balance	17,400	22,631	17,400	22,631
Related Allowance	7,518	6,247	7,518	6,247
Average Recorded Investment	18,457	22,351	19,276	31,354
Interest Income Recognized on impaired loan	0	0	0	0
HELOC [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	57,175	36,617	57,175	36,617
Unpaid Principal Balance	57,175	36,617	57,175	36,617
Related Allowance	13,903	11,819	13,903	11,819
Average Recorded Investment	54,793	33,507	53,547	30,996
Interest Income Recognized on impaired loan	411	180	784	321
R/E Installment Loans [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	67,865	51,471	67,865	51,471
Unpaid Principal Balance	67,865	51,471	67,865	51,471
Related Allowance	18,785	11,837	18,785	11,837
Average Recorded Investment	66,505	49,822	69,036	47,935
Interest Income Recognized on impaired loan	276	182	541	344
Permanent Mortgage Portfolio Segment [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	119,537	115,008	119,537	115,008
Unpaid Principal Balance	119,537	115,008	119,537	115,008
Related Allowance	24,131	14,586	24,131	14,586
Average Recorded Investment	110,785	109,449	96,300	105,886
Interest Income Recognized on impaired loan	734	434	1,390	914
Credit Card & Other [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	933	1,186	933	1,186
Unpaid Principal Balance	933	1,186	933	1,186
Related Allowance	221	752	221	752
Average Recorded Investment	980	1,250	1,025	975
Interest Income Recognized on impaired loan	$ 10	$ 12	$ 21	$ 24