Loans And Allowance For Credit Losses (Summary Of Information On Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	$ 1,329,095	$ 1,889,661
Impaired Financing Receivable, Recorded Investment	924,553	1,325,838
Impaired Financing Receivable, Related Allowance	66,206	77,089
Impaired Financing Receivable, Interest Income, Accrual Method	132,087	109,932
Impaired Financing Receivable, Unpaid Principal Balance	1,109,953	1,908,339
Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	185,895	199,238
Impaired Financing Receivable, Recorded Investment	156,784	146,815
Impaired Financing Receivable, Related Allowance	23,687	12,198
Impaired Financing Receivable, Interest Income, Accrual Method	3,572	3,557
Impaired Financing Receivable, Unpaid Principal Balance	178,281	176,521
Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	216,218	262,511
Impaired Financing Receivable, Recorded Investment	138,945	185,695
Impaired Financing Receivable, Related Allowance	13,900	17,105
Impaired Financing Receivable, Interest Income, Accrual Method	3,620	2,512
Impaired Financing Receivable, Unpaid Principal Balance	151,499	210,319
Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	402,113	461,749
Impaired Financing Receivable, Recorded Investment	295,729	332,510
Impaired Financing Receivable, Related Allowance	37,587	29,303
Impaired Financing Receivable, Interest Income, Accrual Method	7,192	6,069
Impaired Financing Receivable, Unpaid Principal Balance	329,780	386,840
Construction And Land Development [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	134,540	274,226
Impaired Financing Receivable, Recorded Investment	69,950	153,096
Impaired Financing Receivable, Related Allowance	3,483	5,178
Impaired Financing Receivable, Interest Income, Accrual Method	4,013	4,785
Impaired Financing Receivable, Unpaid Principal Balance	85,440	182,385
Term [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	286,389	410,901
Impaired Financing Receivable, Recorded Investment	146,588	257,830
Impaired Financing Receivable, Related Allowance	7,981	16,725
Impaired Financing Receivable, Interest Income, Accrual Method	6,686	7,298
Impaired Financing Receivable, Unpaid Principal Balance	171,826	310,242
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	420,929	685,127
Impaired Financing Receivable, Recorded Investment	216,538	410,926
Impaired Financing Receivable, Related Allowance	11,464	21,903
Impaired Financing Receivable, Interest Income, Accrual Method	10,699	12,083
Impaired Financing Receivable, Unpaid Principal Balance	257,266	492,627
Home Equity Line of Credit [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	13,380	2,766
Impaired Financing Receivable, Recorded Investment	14,768	11,499
Impaired Financing Receivable, Related Allowance	178	297
Impaired Financing Receivable, Interest Income, Accrual Method	385	42
Impaired Financing Receivable, Unpaid Principal Balance	17,547	14,339
One Through Four Family Residential [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	100,283	107,118
Impaired Financing Receivable, Recorded Investment	80,907	92,469
Impaired Financing Receivable, Related Allowance	10,276	12,921
Impaired Financing Receivable, Interest Income, Accrual Method	1,581	1,629
Impaired Financing Receivable, Unpaid Principal Balance	95,613	108,934
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	6,218	9,697
Impaired Financing Receivable, Recorded Investment	3,576	5,795
Impaired Financing Receivable, Related Allowance	175	517
Impaired Financing Receivable, Interest Income, Accrual Method	148	188
Impaired Financing Receivable, Unpaid Principal Balance	4,713	7,054
Bankcard And Other Revolving Plans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	0	24
Impaired Financing Receivable, Recorded Investment	726	287
Impaired Financing Receivable, Related Allowance	0	1
Impaired Financing Receivable, Interest Income, Accrual Method	0	0
Impaired Financing Receivable, Unpaid Principal Balance	726	287
Consumer Other Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	1,770	1,055
Impaired Financing Receivable, Recorded Investment	0	2,007
Impaired Financing Receivable, Related Allowance	0	22
Impaired Financing Receivable, Interest Income, Accrual Method	0	0
Impaired Financing Receivable, Unpaid Principal Balance	0	2,454
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	121,651	120,660
Impaired Financing Receivable, Recorded Investment	99,977	112,057
Impaired Financing Receivable, Related Allowance	10,629	13,758
Impaired Financing Receivable, Interest Income, Accrual Method	2,114	1,859
Impaired Financing Receivable, Unpaid Principal Balance	118,599	133,068
FDIC-Supported Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	384,402	622,125
Impaired Financing Receivable, Recorded Investment	312,309	470,345
Impaired Financing Receivable, Related Allowance	6,526	12,125
Impaired Financing Receivable, Interest Income, Accrual Method	112,082	89,921
Impaired Financing Receivable, Unpaid Principal Balance	404,308	895,804
Impaired Financing Receivable Recorded Investment With an Allowance [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	652,007	751,045
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	126,692	119,780
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	88,584	106,282
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	215,276	226,062
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Construction And Land Development [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	50,744	85,855
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Term [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	112,330	187,112
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	163,074	272,967
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	2,200	3,444
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | One Through Four Family Residential [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	42,132	49,867
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	933	3,085
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Bankcard And Other Revolving Plans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	0	287
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Consumer Other Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	0	175
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	45,265	56,858
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | FDIC-Supported Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	228,392	195,158
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		574,793
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		27,035
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		79,413
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		106,448
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Construction And Land Development [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		67,241
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Term [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		70,718
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		137,959
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		8,055
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | One Through Four Family Residential [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		42,602
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		2,710
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Bankcard And Other Revolving Plans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		0
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Consumer Other Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		1,832
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		55,199
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | FDIC-Supported Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		275,187
Impaired Financing Receivable Recorded Investment With No Allowance [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	272,546
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	30,092
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	50,361
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	80,453
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Construction And Land Development [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	19,206
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Term [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	34,258
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	53,464
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	12,568
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | One Through Four Family Residential [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	38,775
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	2,643
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Bankcard And Other Revolving Plans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	726
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Consumer Other Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	0
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	54,712
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | FDIC-Supported Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	$ 83,917